Observation of soft magnetorotons in bilayer quantum hall ferromagnets

Physical Review Letters

Volumn 90, Issue 23, 2003, Pages

  Luin, Stefano ^a,b   Pellegrini, Vittorio ^a   Pinczuk, Aron ^b,c   Dennis, Brian S ^b   Pfeiffer, Loren N ^b   West, Ken W ^b  

^a NEST INFM and SNS   (Italy)

^b LUCENT TECHNOLOGIES   (United States)

^c Columbia University ^*  (United States)

Author keywords

[No Author keywords available]

Indexed keywords

APPROXIMATION THEORY; BINDING ENERGY; ELECTRON TRANSITIONS; ELECTRON TUNNELING; ENERGY GAP; EXCITONS; LIGHT SCATTERING; MOLECULAR BEAM EPITAXY; QUANTUM THEORY; SEMICONDUCTING ALUMINUM COMPOUNDS; SEMICONDUCTING GALLIUM ARSENIDE; SEMICONDUCTOR QUANTUM WELLS;

COULOMB INTERACTION; DOUBLE QUANTUM WELLS; FERROMAGNETIC BILAYER; INELASTIC LIGHT SCATTERING; MAGNETOROTONS; QUANTUM HALL FERROMAGNETS; QUANTUM PHASE TRANSITION; TUNNELING GAP;

FERROMAGNETIC MATERIALS;

EID: 0042812449     PISSN: 00319007     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Article

References (27)

1. The Quantum Hall Effect, edited by R. E. Prange and S. M. Girvin (Springer-Verlage, New York, 1987).
2. Perspectives in Quantum Hall Effect, edited by S. Das Sarma and A. Pinczuk (Wiley, New York, 1997).
3. C. Kallin and B. I. Halperin, Phys. Rev. B 30, 5655 (1984).
4. S. M. Girvin et al., Phys. Rev. B 33, 2481 (1986).
5. H. A. Fertig, Phys. Rev. B 40, 1087 (1989).
6. L. Brey, Phys. Rev. Lett. 65, 903 (1990).
7. A. H. MacDonald et al., Phys. Rev. Lett. 65, 775 (1990).
8. R. K. Kamilla and J. K. Jain, Phys. Rev. B 55, R13417 (1997).
9. Y. N. Joglekar and A. H. MacDonald, Phys. Rev. B 65, 235319 (2002).
10. G. S. Boebinger et al., Phys. Rev. Lett. 64, 1793 (1990).
11. L. Brey, Phys. Rev. B 47, 4585 (1993).
12. S. Q. Murphy et al., Phys. Rev. Lett. 72, 728 (1994).
13. Kun Yang et al., Phys. Rev. B 54, 11 644 (1996).
14. The system is ferromagnetic also in the pseudospin degree of freedom, due to the layer index [2]. Ferromagnetism arises from exchange interactions and persists even in the limit of zero tunneling.
15. I. B. Spielman et al., Phys. Rev. Lett. 84, 5808 (2000).
16. I. B. Spielman et al., Phys. Rev. Lett. 87, 036803 (2001).
17. M. Kellogg et al., Phys. Rev. Lett. 88, 126804 (2002).
18. V. Pellegrini et al., Phys. Rev. Lett. 78, 310 (1997).
19. S. Das Sarma et al., Phys. Rev. Lett. 79, 917 (1997).
20. V. Pellegrini et al., Science 281, 799 (1998).
21. I. K. Marmorkos and S. Das Sarma, Phys. Rev. B 45, 13 396 (1992).
22. Daw-Wei Wang et al., Phys. Rev. B 66, 195334 (2002)
23. C. Kittel, Quantum Theory of Solids (Wiley, New York, 1987).
24. A. S. Plaut et al., Phys. Rev. B 55, 9282 (1997).
25. M. M. Fogler and F. Wilczek, Phys. Rev. Lett. 86, 1833 (2001).
26. T. S. Lay et al., Phys. Rev. B 50, 17725(R) (1994).
27. M. Abolfath et al., Phys. Rev. B 61, 4762 (2000).