Electrostatic modulation of superconductivity in ultrathin GdBa2Cu3O(7-x) films

Science

Volumn 284, Issue 5417, 1999, Pages 1152-1155

  Ahn, C H ^a   Gariglio, S ^a   Paruch, P ^a   Tybell, T ^a   Antognazza, L ^a   Triscone, J M ^a  

^a UNIVERSITY OF GENEVA   (Switzerland)

Author keywords

[No Author keywords available]

Indexed keywords

ELECTROSTATICS; HIGH TEMPERATURE SUPERCONDUCTORS; MODULATION; OXIDE SUPERCONDUCTORS; ULTRATHIN FILMS;

CRITICAL TEMPERATURES; ELECTROSTATIC MODULATION;

SUPERCONDUCTING FILMS;

ARTICLE; CHEMICAL MODIFICATION; CONDUCTOR; ELECTRIC CONDUCTIVITY; ELECTRIC FIELD; ELECTROCHEMICAL ANALYSIS; FILM; MOLECULAR DYNAMICS; POLARIZATION; PRIORITY JOURNAL;

EID: 0033553666     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.284.5417.1152     Document Type: Article

References (55)

1. A. M. Goldman and N. Markovic, Phys. Today 51 (no. 11), 39 (1998), and references therein; M. P. A. Fisher, G. Grinstein, S. M. Girvin, Phys. Rev. Lett. 64, 587 (1990); M. P. A. Fisher, ibid. 65, 923 (1990); A. F. Hebard and M. A. Paalanen, ibid., p. 927; Y. Liu et al., ibid. 67, 2068 (1991); A. Yazdani and A. Kapitulnik, ibid. 74, 3037 (1995); E. Chow, P. Delsing, D. B. Haviland, ibid. 81, 204 (1998); S. L. Sondhi, S. M. Girvin, J. P. Carini, D. Shahar, Rev. Mod. Phys. 69, 315 (1997); A. J. Rimberg et al., Phys. Rev. Lett. 78, 2632 (1997); M. I. Eremets, K. Shimizu, T. C. Kobayashi, K. Amaya, Science 281, 1333 (1998); G. T. Seidler, T. F. Rosenbaum, B. W. Veal, Phys. Rev. B 45, 10162 (1992); K. Karpinska et al., Phys. Rev. Lett. 77, 3033 (1996); N. E. Hussey et al., ibid. 80, 2909 (1998).
2. A. M. Goldman and N. Markovic, Phys. Today 51 (no. 11), 39 (1998), and references therein; M. P. A. Fisher, G. Grinstein, S. M. Girvin, Phys. Rev. Lett. 64, 587 (1990); M. P. A. Fisher, ibid. 65, 923 (1990); A. F. Hebard and M. A. Paalanen, ibid., p. 927; Y. Liu et al., ibid. 67, 2068 (1991); A. Yazdani and A. Kapitulnik, ibid. 74, 3037 (1995); E. Chow, P. Delsing, D. B. Haviland, ibid. 81, 204 (1998); S. L. Sondhi, S. M. Girvin, J. P. Carini, D. Shahar, Rev. Mod. Phys. 69, 315 (1997); A. J. Rimberg et al., Phys. Rev. Lett. 78, 2632 (1997); M. I. Eremets, K. Shimizu, T. C. Kobayashi, K. Amaya, Science 281, 1333 (1998); G. T. Seidler, T. F. Rosenbaum, B. W. Veal, Phys. Rev. B 45, 10162 (1992); K. Karpinska et al., Phys. Rev. Lett. 77, 3033 (1996); N. E. Hussey et al., ibid. 80, 2909 (1998).
3. A. M. Goldman and N. Markovic, Phys. Today 51 (no. 11), 39 (1998), and references therein; M. P. A. Fisher, G. Grinstein, S. M. Girvin, Phys. Rev. Lett. 64, 587 (1990); M. P. A. Fisher, ibid. 65, 923 (1990); A. F. Hebard and M. A. Paalanen, ibid., p. 927; Y. Liu et al., ibid. 67, 2068 (1991); A. Yazdani and A. Kapitulnik, ibid. 74, 3037 (1995); E. Chow, P. Delsing, D. B. Haviland, ibid. 81, 204 (1998); S. L. Sondhi, S. M. Girvin, J. P. Carini, D. Shahar, Rev. Mod. Phys. 69, 315 (1997); A. J. Rimberg et al., Phys. Rev. Lett. 78, 2632 (1997); M. I. Eremets, K. Shimizu, T. C. Kobayashi, K. Amaya, Science 281, 1333 (1998); G. T. Seidler, T. F. Rosenbaum, B. W. Veal, Phys. Rev. B 45, 10162 (1992); K. Karpinska et al., Phys. Rev. Lett. 77, 3033 (1996); N. E. Hussey et al., ibid. 80, 2909 (1998).
4. A. M. Goldman and N. Markovic, Phys. Today 51 (no. 11), 39 (1998), and references therein; M. P. A. Fisher, G. Grinstein, S. M. Girvin, Phys. Rev. Lett. 64, 587 (1990); M. P. A. Fisher, ibid. 65, 923 (1990); A. F. Hebard and M. A. Paalanen, ibid., p. 927; Y. Liu et al., ibid. 67, 2068 (1991); A. Yazdani and A. Kapitulnik, ibid. 74, 3037 (1995); E. Chow, P. Delsing, D. B. Haviland, ibid. 81, 204 (1998); S. L. Sondhi, S. M. Girvin, J. P. Carini, D. Shahar, Rev. Mod. Phys. 69, 315 (1997); A. J. Rimberg et al., Phys. Rev. Lett. 78, 2632 (1997); M. I. Eremets, K. Shimizu, T. C. Kobayashi, K. Amaya, Science 281, 1333 (1998); G. T. Seidler, T. F. Rosenbaum, B. W. Veal, Phys. Rev. B 45, 10162 (1992); K. Karpinska et al., Phys. Rev. Lett. 77, 3033 (1996); N. E. Hussey et al., ibid. 80, 2909 (1998).
5. A. M. Goldman and N. Markovic, Phys. Today 51 (no. 11), 39 (1998), and references therein; M. P. A. Fisher, G. Grinstein, S. M. Girvin, Phys. Rev. Lett. 64, 587 (1990); M. P. A. Fisher, ibid. 65, 923 (1990); A. F. Hebard and M. A. Paalanen, ibid., p. 927; Y. Liu et al., ibid. 67, 2068 (1991); A. Yazdani and A. Kapitulnik, ibid. 74, 3037 (1995); E. Chow, P. Delsing, D. B. Haviland, ibid. 81, 204 (1998); S. L. Sondhi, S. M. Girvin, J. P. Carini, D. Shahar, Rev. Mod. Phys. 69, 315 (1997); A. J. Rimberg et al., Phys. Rev. Lett. 78, 2632 (1997); M. I. Eremets, K. Shimizu, T. C. Kobayashi, K. Amaya, Science 281, 1333 (1998); G. T. Seidler, T. F. Rosenbaum, B. W. Veal, Phys. Rev. B 45, 10162 (1992); K. Karpinska et al., Phys. Rev. Lett. 77, 3033 (1996); N. E. Hussey et al., ibid. 80, 2909 (1998).
6. A. M. Goldman and N. Markovic, Phys. Today 51 (no. 11), 39 (1998), and references therein; M. P. A. Fisher, G. Grinstein, S. M. Girvin, Phys. Rev. Lett. 64, 587 (1990); M. P. A. Fisher, ibid. 65, 923 (1990); A. F. Hebard and M. A. Paalanen, ibid., p. 927; Y. Liu et al., ibid. 67, 2068 (1991); A. Yazdani and A. Kapitulnik, ibid. 74, 3037 (1995); E. Chow, P. Delsing, D. B. Haviland, ibid. 81, 204 (1998); S. L. Sondhi, S. M. Girvin, J. P. Carini, D. Shahar, Rev. Mod. Phys. 69, 315 (1997); A. J. Rimberg et al., Phys. Rev. Lett. 78, 2632 (1997); M. I. Eremets, K. Shimizu, T. C. Kobayashi, K. Amaya, Science 281, 1333 (1998); G. T. Seidler, T. F. Rosenbaum, B. W. Veal, Phys. Rev. B 45, 10162 (1992); K. Karpinska et al., Phys. Rev. Lett. 77, 3033 (1996); N. E. Hussey et al., ibid. 80, 2909 (1998).
7. A. M. Goldman and N. Markovic, Phys. Today 51 (no. 11), 39 (1998), and references therein; M. P. A. Fisher, G. Grinstein, S. M. Girvin, Phys. Rev. Lett. 64, 587 (1990); M. P. A. Fisher, ibid. 65, 923 (1990); A. F. Hebard and M. A. Paalanen, ibid., p. 927; Y. Liu et al., ibid. 67, 2068 (1991); A. Yazdani and A. Kapitulnik, ibid. 74, 3037 (1995); E. Chow, P. Delsing, D. B. Haviland, ibid. 81, 204 (1998); S. L. Sondhi, S. M. Girvin, J. P. Carini, D. Shahar, Rev. Mod. Phys. 69, 315 (1997); A. J. Rimberg et al., Phys. Rev. Lett. 78, 2632 (1997); M. I. Eremets, K. Shimizu, T. C. Kobayashi, K. Amaya, Science 281, 1333 (1998); G. T. Seidler, T. F. Rosenbaum, B. W. Veal, Phys. Rev. B 45, 10162 (1992); K. Karpinska et al., Phys. Rev. Lett. 77, 3033 (1996); N. E. Hussey et al., ibid. 80, 2909 (1998).
8. A. M. Goldman and N. Markovic, Phys. Today 51 (no. 11), 39 (1998), and references therein; M. P. A. Fisher, G. Grinstein, S. M. Girvin, Phys. Rev. Lett. 64, 587 (1990); M. P. A. Fisher, ibid. 65, 923 (1990); A. F. Hebard and M. A. Paalanen, ibid., p. 927; Y. Liu et al., ibid. 67, 2068 (1991); A. Yazdani and A. Kapitulnik, ibid. 74, 3037 (1995); E. Chow, P. Delsing, D. B. Haviland, ibid. 81, 204 (1998); S. L. Sondhi, S. M. Girvin, J. P. Carini, D. Shahar, Rev. Mod. Phys. 69, 315 (1997); A. J. Rimberg et al., Phys. Rev. Lett. 78, 2632 (1997); M. I. Eremets, K. Shimizu, T. C. Kobayashi, K. Amaya, Science 281, 1333 (1998); G. T. Seidler, T. F. Rosenbaum, B. W. Veal, Phys. Rev. B 45, 10162 (1992); K. Karpinska et al., Phys. Rev. Lett. 77, 3033 (1996); N. E. Hussey et al., ibid. 80, 2909 (1998).
9. A. M. Goldman and N. Markovic, Phys. Today 51 (no. 11), 39 (1998), and references therein; M. P. A. Fisher, G. Grinstein, S. M. Girvin, Phys. Rev. Lett. 64, 587 (1990); M. P. A. Fisher, ibid. 65, 923 (1990); A. F. Hebard and M. A. Paalanen, ibid., p. 927; Y. Liu et al., ibid. 67, 2068 (1991); A. Yazdani and A. Kapitulnik, ibid. 74, 3037 (1995); E. Chow, P. Delsing, D. B. Haviland, ibid. 81, 204 (1998); S. L. Sondhi, S. M. Girvin, J. P. Carini, D. Shahar, Rev. Mod. Phys. 69, 315 (1997); A. J. Rimberg et al., Phys. Rev. Lett. 78, 2632 (1997); M. I. Eremets, K. Shimizu, T. C. Kobayashi, K. Amaya, Science 281, 1333 (1998); G. T. Seidler, T. F. Rosenbaum, B. W. Veal, Phys. Rev. B 45, 10162 (1992); K. Karpinska et al., Phys. Rev. Lett. 77, 3033 (1996); N. E. Hussey et al., ibid. 80, 2909 (1998).
10. A. M. Goldman and N. Markovic, Phys. Today 51 (no. 11), 39 (1998), and references therein; M. P. A. Fisher, G. Grinstein, S. M. Girvin, Phys. Rev. Lett. 64, 587 (1990); M. P. A. Fisher, ibid. 65, 923 (1990); A. F. Hebard and M. A. Paalanen, ibid., p. 927; Y. Liu et al., ibid. 67, 2068 (1991); A. Yazdani and A. Kapitulnik, ibid. 74, 3037 (1995); E. Chow, P. Delsing, D. B. Haviland, ibid. 81, 204 (1998); S. L. Sondhi, S. M. Girvin, J. P. Carini, D. Shahar, Rev. Mod. Phys. 69, 315 (1997); A. J. Rimberg et al., Phys. Rev. Lett. 78, 2632 (1997); M. I. Eremets, K. Shimizu, T. C. Kobayashi, K. Amaya, Science 281, 1333 (1998); G. T. Seidler, T. F. Rosenbaum, B. W. Veal, Phys. Rev. B 45, 10162 (1992); K. Karpinska et al., Phys. Rev. Lett. 77, 3033 (1996); N. E. Hussey et al., ibid. 80, 2909 (1998).
11. A. M. Goldman and N. Markovic, Phys. Today 51 (no. 11), 39 (1998), and references therein; M. P. A. Fisher, G. Grinstein, S. M. Girvin, Phys. Rev. Lett. 64, 587 (1990); M. P. A. Fisher, ibid. 65, 923 (1990); A. F. Hebard and M. A. Paalanen, ibid., p. 927; Y. Liu et al., ibid. 67, 2068 (1991); A. Yazdani and A. Kapitulnik, ibid. 74, 3037 (1995); E. Chow, P. Delsing, D. B. Haviland, ibid. 81, 204 (1998); S. L. Sondhi, S. M. Girvin, J. P. Carini, D. Shahar, Rev. Mod. Phys. 69, 315 (1997); A. J. Rimberg et al., Phys. Rev. Lett. 78, 2632 (1997); M. I. Eremets, K. Shimizu, T. C. Kobayashi, K. Amaya, Science 281, 1333 (1998); G. T. Seidler, T. F. Rosenbaum, B. W. Veal, Phys. Rev. B 45, 10162 (1992); K. Karpinska et al., Phys. Rev. Lett. 77, 3033 (1996); N. E. Hussey et al., ibid. 80, 2909 (1998).
12. A. M. Goldman and N. Markovic, Phys. Today 51 (no. 11), 39 (1998), and references therein; M. P. A. Fisher, G. Grinstein, S. M. Girvin, Phys. Rev. Lett. 64, 587 (1990); M. P. A. Fisher, ibid. 65, 923 (1990); A. F. Hebard and M. A. Paalanen, ibid., p. 927; Y. Liu et al., ibid. 67, 2068 (1991); A. Yazdani and A. Kapitulnik, ibid. 74, 3037 (1995); E. Chow, P. Delsing, D. B. Haviland, ibid. 81, 204 (1998); S. L. Sondhi, S. M. Girvin, J. P. Carini, D. Shahar, Rev. Mod. Phys. 69, 315 (1997); A. J. Rimberg et al., Phys. Rev. Lett. 78, 2632 (1997); M. I. Eremets, K. Shimizu, T. C. Kobayashi, K. Amaya, Science 281, 1333 (1998); G. T. Seidler, T. F. Rosenbaum, B. W. Veal, Phys. Rev. B 45, 10162 (1992); K. Karpinska et al., Phys. Rev. Lett. 77, 3033 (1996); N. E. Hussey et al., ibid. 80, 2909 (1998).
13. A. M. Goldman and N. Markovic, Phys. Today 51 (no. 11), 39 (1998), and references therein; M. P. A. Fisher, G. Grinstein, S. M. Girvin, Phys. Rev. Lett. 64, 587 (1990); M. P. A. Fisher, ibid. 65, 923 (1990); A. F. Hebard and M. A. Paalanen, ibid., p. 927; Y. Liu et al., ibid. 67, 2068 (1991); A. Yazdani and A. Kapitulnik, ibid. 74, 3037 (1995); E. Chow, P. Delsing, D. B. Haviland, ibid. 81, 204 (1998); S. L. Sondhi, S. M. Girvin, J. P. Carini, D. Shahar, Rev. Mod. Phys. 69, 315 (1997); A. J. Rimberg et al., Phys. Rev. Lett. 78, 2632 (1997); M. I. Eremets, K. Shimizu, T. C. Kobayashi, K. Amaya, Science 281, 1333 (1998); G. T. Seidler, T. F. Rosenbaum, B. W. Veal, Phys. Rev. B 45, 10162 (1992); K. Karpinska et al., Phys. Rev. Lett. 77, 3033 (1996); N. E. Hussey et al., ibid. 80, 2909 (1998).
14. Y. Ando, G. S. Boebinger, A. Passner, T. Kimura, K. Kishio, Phys. Rev. Lett. 72, 4662 (1995); G. S. Boebinger et al., ibid. 77, 5417 (1996).
15. Y. Ando, G. S. Boebinger, A. Passner, T. Kimura, K. Kishio, Phys. Rev. Lett. 72, 4662 (1995); G. S. Boebinger et al., ibid. 77, 5417 (1996).
16. Y. Fukuzumi, K. Mizuhashi, K. Takenaka, S. Uchida, ibid. 76, 684 (1996).
17. P. Fournier et al., ibid. 81, 4720 (1998).
18. S.-C. Zhang, Science 275, 1089 (1997).
19. C. H. Ahn et al., ibid. 269, 373 (1995); Y. Watanabe, Appl. Phys. Lett. 66, 1770 (1995); S. Hontsu, J. Ishii, H. Tabata, T. Kawai, ibid. 67, 554 (1995); S. Hontsu, M. Nakamori, H. Tabata, J. Ishii, T. Kawai, IEEE Trans. Electron. E80-C, 1304 (1997); C. H. Ahn et al., Appl. Phys. Lett. 70, 206 (1997); C. H. Ahn et al., Science 276, 1100 (1997); U. Kabasawa, H. Hasegawa, T. Fukazawa, Y. Tarutani, K. Takagi, J. Appl. Phys. 81, 2302 (1997); L. X. Cao et al., Physica C 47-52, 303 (1998).
20. C. H. Ahn et al., ibid. 269, 373 (1995); Y. Watanabe, Appl. Phys. Lett. 66, 1770 (1995); S. Hontsu, J. Ishii, H. Tabata, T. Kawai, ibid. 67, 554 (1995); S. Hontsu, M. Nakamori, H. Tabata, J. Ishii, T. Kawai, IEEE Trans. Electron. E80-C, 1304 (1997); C. H. Ahn et al., Appl. Phys. Lett. 70, 206 (1997); C. H. Ahn et al., Science 276, 1100 (1997); U. Kabasawa, H. Hasegawa, T. Fukazawa, Y. Tarutani, K. Takagi, J. Appl. Phys. 81, 2302 (1997); L. X. Cao et al., Physica C 47-52, 303 (1998).
21. C. H. Ahn et al., ibid. 269, 373 (1995); Y. Watanabe, Appl. Phys. Lett. 66, 1770 (1995); S. Hontsu, J. Ishii, H. Tabata, T. Kawai, ibid. 67, 554 (1995); S. Hontsu, M. Nakamori, H. Tabata, J. Ishii, T. Kawai, IEEE Trans. Electron. E80-C, 1304 (1997); C. H. Ahn et al., Appl. Phys. Lett. 70, 206 (1997); C. H. Ahn et al., Science 276, 1100 (1997); U. Kabasawa, H. Hasegawa, T. Fukazawa, Y. Tarutani, K. Takagi, J. Appl. Phys. 81, 2302 (1997); L. X. Cao et al., Physica C 47-52, 303 (1998).
22. C. H. Ahn et al., ibid. 269, 373 (1995); Y. Watanabe, Appl. Phys. Lett. 66, 1770 (1995); S. Hontsu, J. Ishii, H. Tabata, T. Kawai, ibid. 67, 554 (1995); S. Hontsu, M. Nakamori, H. Tabata, J. Ishii, T. Kawai, IEEE Trans. Electron. E80-C, 1304 (1997); C. H. Ahn et al., Appl. Phys. Lett. 70, 206 (1997); C. H. Ahn et al., Science 276, 1100 (1997); U. Kabasawa, H. Hasegawa, T. Fukazawa, Y. Tarutani, K. Takagi, J. Appl. Phys. 81, 2302 (1997); L. X. Cao et al., Physica C 47-52, 303 (1998).
23. C. H. Ahn et al., ibid. 269, 373 (1995); Y. Watanabe, Appl. Phys. Lett. 66, 1770 (1995); S. Hontsu, J. Ishii, H. Tabata, T. Kawai, ibid. 67, 554 (1995); S. Hontsu, M. Nakamori, H. Tabata, J. Ishii, T. Kawai, IEEE Trans. Electron. E80-C, 1304 (1997); C. H. Ahn et al., Appl. Phys. Lett. 70, 206 (1997); C. H. Ahn et al., Science 276, 1100 (1997); U. Kabasawa, H. Hasegawa, T. Fukazawa, Y. Tarutani, K. Takagi, J. Appl. Phys. 81, 2302 (1997); L. X. Cao et al., Physica C 47-52, 303 (1998).
24. C. H. Ahn et al., ibid. 269, 373 (1995); Y. Watanabe, Appl. Phys. Lett. 66, 1770 (1995); S. Hontsu, J. Ishii, H. Tabata, T. Kawai, ibid. 67, 554 (1995); S. Hontsu, M. Nakamori, H. Tabata, J. Ishii, T. Kawai, IEEE Trans. Electron. E80-C, 1304 (1997); C. H. Ahn et al., Appl. Phys. Lett. 70, 206 (1997); C. H. Ahn et al., Science 276, 1100 (1997); U. Kabasawa, H. Hasegawa, T. Fukazawa, Y. Tarutani, K. Takagi, J. Appl. Phys. 81, 2302 (1997); L. X. Cao et al., Physica C 47-52, 303 (1998).
25. C. H. Ahn et al., ibid. 269, 373 (1995); Y. Watanabe, Appl. Phys. Lett. 66, 1770 (1995); S. Hontsu, J. Ishii, H. Tabata, T. Kawai, ibid. 67, 554 (1995); S. Hontsu, M. Nakamori, H. Tabata, J. Ishii, T. Kawai, IEEE Trans. Electron. E80-C, 1304 (1997); C. H. Ahn et al., Appl. Phys. Lett. 70, 206 (1997); C. H. Ahn et al., Science 276, 1100 (1997); U. Kabasawa, H. Hasegawa, T. Fukazawa, Y. Tarutani, K. Takagi, J. Appl. Phys. 81, 2302 (1997); L. X. Cao et al., Physica C 47-52, 303 (1998).
26. C. H. Ahn et al., ibid. 269, 373 (1995); Y. Watanabe, Appl. Phys. Lett. 66, 1770 (1995); S. Hontsu, J. Ishii, H. Tabata, T. Kawai, ibid. 67, 554 (1995); S. Hontsu, M. Nakamori, H. Tabata, J. Ishii, T. Kawai, IEEE Trans. Electron. E80-C, 1304 (1997); C. H. Ahn et al., Appl. Phys. Lett. 70, 206 (1997); C. H. Ahn et al., Science 276, 1100 (1997); U. Kabasawa, H. Hasegawa, T. Fukazawa, Y. Tarutani, K. Takagi, J. Appl. Phys. 81, 2302 (1997); L. X. Cao et al., Physica C 47-52, 303 (1998).
27. R. E. Glover III and M. D. Sherrill, Phys. Rev. Lett. 5, 248 (1960).
28. J. Mannhart, D. G. Schlom, J. G. Bednorz, K. A. Müller, ibid. 67, 2099 (1991); X. X. Xi et al., ibid. 68, 1240 (1992); A. Walkenhorst et al., ibid. 69, 2709 (1992); J. Mannhart, Supercond. Sci. Technol. 9, 49 (1996).
29. J. Mannhart, D. G. Schlom, J. G. Bednorz, K. A. Müller, ibid. 67, 2099 (1991); X. X. Xi et al., ibid. 68, 1240 (1992); A. Walkenhorst et al., ibid. 69, 2709 (1992); J. Mannhart, Supercond. Sci. Technol. 9, 49 (1996).
30. J. Mannhart, D. G. Schlom, J. G. Bednorz, K. A. Müller, ibid. 67, 2099 (1991); X. X. Xi et al., ibid. 68, 1240 (1992); A. Walkenhorst et al., ibid. 69, 2709 (1992); J. Mannhart, Supercond. Sci. Technol. 9, 49 (1996).
31. J. Mannhart, D. G. Schlom, J. G. Bednorz, K. A. Müller, ibid. 67, 2099 (1991); X. X. Xi et al., ibid. 68, 1240 (1992); A. Walkenhorst et al., ibid. 69, 2709 (1992); J. Mannhart, Supercond. Sci. Technol. 9, 49 (1996).
32. A. W. Kleinsasser et al., Appl. Phys. Lett. 55, 1909 (1989); T. Akazaki et al., ibid. 66, 418 (1996); B. Mayer, J. Mannhart, H. Hilgenkamp, ibid., p. 3031.
33. A. W. Kleinsasser et al., Appl. Phys. Lett. 55, 1909 (1989); T. Akazaki et al., ibid. 66, 418 (1996); B. Mayer, J. Mannhart, H. Hilgenkamp, ibid., p. 3031.
34. A. W. Kleinsasser et al., Appl. Phys. Lett. 55, 1909 (1989); T. Akazaki et al., ibid. 66, 418 (1996); B. Mayer, J. Mannhart, H. Hilgenkamp, ibid., p. 3031.
35. J.-M. Triscone et al., J. Appl Phys. 78, 4298 (1996).
36. T. Terashima et al., Phys. Rev. Lett. 67, 1362 (1991); J.-M. Triscone and Ø. Fischer, Rep. Prog. Phys. 60, 1673 (1997).
37. T. Terashima et al., Phys. Rev. Lett. 67, 1362 (1991); J.-M. Triscone and Ø. Fischer, Rep. Prog. Phys. 60, 1673 (1997).
38. Off-axis scans reveal GBCO [100] (and PBCO [100])IISTO [100], as well as epitaxial growth of tetragonal PZT (001) on GBCO (001), with PZT [100]IIGBCO [100]. Rocking curves taken around the 005 reflection of PBCO and GBCO have typical full widths at half maximum (FWHM) of ∼0.09°, and rocking curves taken around the 001 reflection of PZT have a typical FWHM of ∼0.6°.
39. Because the primary region of interest is at low temperatures, where PBCO is insulating, the resistivity is calculated using the thickness of the GBCO layer.
40. During fabrication of the heterostructures, the ferroelectric layer is uniformly poled. As a result, it was not possible to measure the resistivity for the unpolarized (randomly polarized) state of the ferroelectric.
41. We believe the differences between the samples shown in Figs. 3 and 4 are due to run-to-run variations in the deposition parameters; for example, the substrate temperature and oxygenation of the samples.
42. To suppress the possible influence of the dip, the fits were carried out on the measurements taker at 7 T. Fits to the zero field data, as well as on another sample showing a superconductor-insulator transition in which the dip is not present at zero field, also yield the same conclusions.
43. Because of geometric constraints, it was not possible to measure simultaneously the size of the field effect and the carrier concentration. The Hall effect measurements described in the text were obtained on separate samples showing similar resistivities, critical temperatures, and temperature dependencies.
44. V. J. Emery and S. A. Kivelson, Phys. Rev. Lett. 74, 3253 (1995); Nature 374, 434 (1995). Other theories that consider phase fluctuations include S. Doniach and M. Inui, Phys. Rev. B 41, 6669 (1990); D. Ariosa and H. Beck, ibid. 43, 344 (1991); and T. Schneider and H. Keller, Phys. Rev. Lett. 69, 3374 (1992).
45. V. J. Emery and S. A. Kivelson, Phys. Rev. Lett. 74, 3253 (1995); Nature 374, 434 (1995). Other theories that consider phase fluctuations include S. Doniach and M. Inui, Phys. Rev. B 41, 6669 (1990); D. Ariosa and H. Beck, ibid. 43, 344 (1991); and T. Schneider and H. Keller, Phys. Rev. Lett. 69, 3374 (1992).
46. V. J. Emery and S. A. Kivelson, Phys. Rev. Lett. 74, 3253 (1995); Nature 374, 434 (1995). Other theories that consider phase fluctuations include S. Doniach and M. Inui, Phys. Rev. B 41, 6669 (1990); D. Ariosa and H. Beck, ibid. 43, 344 (1991); and T. Schneider and H. Keller, Phys. Rev. Lett. 69, 3374 (1992).
47. V. J. Emery and S. A. Kivelson, Phys. Rev. Lett. 74, 3253 (1995); Nature 374, 434 (1995). Other theories that consider phase fluctuations include S. Doniach and M. Inui, Phys. Rev. B 41, 6669 (1990); D. Ariosa and H. Beck, ibid. 43, 344 (1991); and T. Schneider and H. Keller, Phys. Rev. Lett. 69, 3374 (1992).
48. V. J. Emery and S. A. Kivelson, Phys. Rev. Lett. 74, 3253 (1995); Nature 374, 434 (1995). Other theories that consider phase fluctuations include S. Doniach and M. Inui, Phys. Rev. B 41, 6669 (1990); D. Ariosa and H. Beck, ibid. 43, 344 (1991); and T. Schneider and H. Keller, Phys. Rev. Lett. 69, 3374 (1992).
49. A. G. Sun, L. M. Paulius, D. A. Gajewski, M. B. Maple, R. C. Dynes, Phys. Rev. B 50, 3266 (1994).
50. -3 ohm·cm in underdoped YBCO single crystals [see (7)].
51. M. Kastner, R. J. Birgeneau, G. Shirane, Y. Endoh, Rev. Mod. Phys. 70, 897 (1998); N. W. Preyer et al., Phys. Rev. B 39, 11563 (1989).
52. M. Kastner, R. J. Birgeneau, G. Shirane, Y. Endoh, Rev. Mod. Phys. 70, 897 (1998); N. W. Preyer et al., Phys. Rev. B 39, 11563 (1989).
53. A. Carrington, A. P. Mackenzie, C. T. Lin, J. R. Cooper, Phys. Rev. Lett. 69, 2855 (1992); T. Ito, K. Takenaka, S. Uchida, ibid. 70, 3995 (1993).
54. A. Carrington, A. P. Mackenzie, C. T. Lin, J. R. Cooper, Phys. Rev. Lett. 69, 2855 (1992); T. Ito, K. Takenaka, S. Uchida, ibid. 70, 3995 (1993).
55. We thank M. Beasley, Ø. Fischer, B. Giovannini, Y. Kagan, P. Martinoli, J. Perret, and T. Schneider for useful discussions and D. Chablaix for technical help. Supported by the Fonds National Suisse de la Recherche Scientifique.