Visualization of geometric influences on proximity effects in heterogeneous superconductor thin films

Nature Physics

Volumn 8, Issue 6, 2012, Pages 464-469

  Kim, Jungdae ^a   Chua, Victor ^a   Fiete, Gregory A ^a   Nam, Hyoungdo ^a   MacDonald, Allan H ^a   Shih, Chih Kang ^a  

^a UNIVERSITY OF TEXAS AT AUSTIN   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

GEOMETRY; NANOWIRES; SUBSTRATES; SUPERCONDUCTING DEVICES;

HETEROGENEOUS SYSTEMS; JUNCTION GEOMETRIES; METALLIC NANOWIRES; SUPERCONDUCTING GAPS; SUPERCONDUCTING JUNCTIONS; SUPERCONDUCTING ORDERING; SUPERCONDUCTOR STRUCTURES; SUPERCONDUCTOR THIN FILM;

SUPERCONDUCTING MATERIALS;

EID: 84861657382     PISSN: 17452473     EISSN: 17452481     Source Type: Journal    
DOI: 10.1038/nphys2287     Document Type: Article

References (26)

1. Gueron, S. et al. Superconducting proximity effect probed on a mesoscopic length scale. Phys. Rev. Lett. 77, 3025-3028 (1996). (Pubitemid 126624198)
2. Belzig, W. et al. Quasiclassical Green's function approach to mesoscopic superconductivity. Superlatt. Microstr. 25, 1251-1288 (1999).
3. Pannetier, B. & Courtois, H. Andreev reflection and proximity effect. J. Low Temp. Phys. 118, 599-615 (2000).
4. Dirks, Travis et al. Transport through Andreev bound states in a grapheme quantum dot. Nature Phys. 7, 386-390 (2011).
5. Pillet, J. D. et al. Andreev bound states in supercurrent-carrying carbon nanotubes revealed. Nature Phys. 6, 965-969 (2010).
6. Wang, J. et al. Proximity-induced superconductivity in nanowires: Minigap state and differential magnetoresistance oscillations. Phys. Rev. Lett. 102, 4-247003 (2009).
7. le Sueur, H. et al. Phase controlled superconducting proximity effect probed by tunnelling spectroscopy. Phys. Rev. Lett. 100, 197002 (2008).
8. Usadel, K. D. The diffusion approximation for superconducting alloys. Phys. Rev. Lett. 25, 507-509 (1970).
9. Nazarov, Yu. V. Novel circuit theory of Andreev reflection. Superlatt. Microstr. 25, 1221-1231 (1999).
10. Kamenev, A. & Levchenko, A. Keldysh technique and non-linear sigma model: Basic principles and applications. Adv. Phys. 58, 197-319 (2009).
11. Belzig, W., Bruder, C. & Schn, G. Local density of states in a dirty normal metal connected to a superconductor. Phys. Rev. B 54, 9443-9448 (1996).
12. Cuevas, J. C. et al. Proximity effect and multiple Andreev reflections in diffusive superconductor normal-metal superconductor junctions. Phys. Rev. B 73, 184505 (2006).
13. Ganz, E. et al. Growth and morphology of Pb on Si(111). Surf. Sci. 257, 259-273 (1991).
14. Seehofer, L., Falkenberg, G., Daboul, D. & Johnson, R. L. Structural study of the close-packed two-dimensional phases of Pb on Ge(111) and Si(111). Phys. Rev. B 51, 13503-13515 (1995).
15. Hupalo, M. et al. Atomic models, domain-wall arrangement, and electronic structure of the dense Pb/Si(111)-√3×√3 phase. Phys. Rev. B 66, 161410 (2002).
16. Qin, S. Y., Kim, J., Niu, Q. & Shih, C. K. Superconductivity at the two-dimensional limit. Science 324, 1314-1317 (2009).
17. Zhang, T. et al. Superconductivity in one-atomic-layer metal films grown on Si(111). Nature Phys. 6, 104-108 (2010).
18. Eom, D., Qin, S., Chou, M. Y. & Shih, C. K. Persistent superconductivity in ultrathin Pb films: A scanning tunnelling spectroscopy study. Phys. Rev. Lett. 96, 027005 (2006).
19. Kim, J. et al. Universal quenching of the superconducting state of two-dimensional nanosize Pb-island structures. Phys. Rev. B 84, 014517 (2011).
20. Bardeen, J., Cooper, L. N. & Schrieffer, J. R. Theory of superconductivity. Phys. Rev. 108, 1175-1204 (1957).
21. Tinkham, M. Introduction to Superconductivity 2nd edn (Dover, 1996).
22. Ozer, M. M., Thompson, J. R. & Weitering, H. H. Hard superconductivity of a soft metal in the quantum regime. Nature Phys. 2, 173-176 (2006). (Pubitemid 43553497)
23. Dubos, P., Courtois, H., Buisson, O. & Pannetier, B. Coherent low-energy charge transport in a diffusive S-N-S junction. Phys. Rev. Lett. 87, 206801 (2001).
24. Ohta, H. & Matsui, T. Nanometer SNS junctions as quantum-well devices. IEEE Trans. Appl. Supercond. 7, 2814-2817 (1997). (Pubitemid 127765611)
25. Sipr, O. & Gyorffy, B. L. Interpretation of bound states in inhomogeneous superconductors: The role of Andreev reflection. J. Phys. Condens. Matter 8, 169-191 (1996). (Pubitemid 126582280)
26. Zhou, F., Charlat, P., Spivak, B. & Pannetier, B. Density of states in superconductor-normal metal-superconductor junctions. J. Low Temp. Phys. 110, 841-850 (1998). (Pubitemid 128512236)