An effective-Hamiltonian approach to the study of the interference effect in macroscopic magnetic coherence

Journal of Physics Condensed Matter

Volumn 9, Issue 3, 1997, Pages 693-701

  Wang, Xiao Biog ^a,b   Pu, Fu Cho ^a,c  

^a INSTITUTE OF PHYSICS   (China)

^b SHANXI UNIVERSITY   (China)

^c GUANGZHOU UNIVERSITY   (China)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0542424284     PISSN: 09538984     EISSN: None     Source Type: Journal    
DOI: 10.1088/0953-8984/9/3/009     Document Type: Article

References (21)

1. For a description of recent progress, see Gunther L and Barbara B (ed) 1995 Quantum Tunneling of Magnetization (Proc. NATO Conf.) (Dordrecht: Kluwer)
2. Enz M and Schilling R 1986 J. Phys. C: Solid State Phys. 19 1765, L711
3. van Hemmea J L and Sütö A 1986 Europhys. Lett. 1 481: 1986 Physica B 141 37
4. van Hemmea J L and Sütö A 1986 Europhys. Lett. 1 481: 1986 Physica B 141 37
5. Chudnovsky E M and Gunther L 1988 Phys. Rev, Lett. 60 661
6. Awschalom D D, DiVincenzo D P and Smyth J F 1992 Science 258 414 and references therein
7. Barbarn B. Sampaio L C, Wegrowe J E, Ratnam B A, Marchand A, Paulsen C, Novak M A, Tholence J L, Uehara M and Fruchart D 1993 J. Appl Phys. 73 6703 and references therein
8. Tejada J and Zhang X X 1993 J. Appl. Phys. 73 6709 and references therein
9. Friedman J R, Sarachik M P, Tejada J and Ziolo R 1996 Phys. Rev. Lett. 76 3830
10. Loss D. DiVincenzo D P and Grinstein G 1992 Phys. Rev. Lett. 69 3232
11. von Delft J and Henley C L 1992 Phys. Rev. Lett. 69 3236
12. Garg A 1993 Europhys. Lett. 22 205
13. Chudnovsky E M and DiVincenzo D P 1993 Phys. Rev. B 48 10 548
14. Wang X B and Pu F C 1996 J. Phys.: Condens. Matter 8 L541
15. Leggett A J. Chakravarty S. Dorsey A T, Fisher M P A, Garg A and Zwerger W 1987 Rev. Mod. Phys. 59 1
16. Coleman S 1985 Aspects of Symmetry (New York: Cambridge University Press) ch 7
17. Garg A and Kim G-H 1992 Phys. Rev. B 45 12 921 The authors have calculated the tunnelling rate of the model in the presence of an external field, which has a different emphasis to ours.
18. Fradkin E 1991 Field Theories in Condensed Matter (New York: Addison-Wesley) ch 5
19. Haldane F D M 1983 Phys. Lett. 93A 464
20. Auerbach A 1994 Interacting Electrons and Quantum Magnetism (Berlin: Springer) ch 10
21. eff itself does not have a time-reversal symmetry. Here we introduce a 'time-reversal' (time-reversal-like) operator τ to help us to discuss the degeneracy of the eigenstates, which proves to be very useful.