Applications of reflection positivity in strongly correlated electron systems

Physical Review B - Condensed Matter and Materials Physics

Volumn 54, Issue 7, 1996, Pages 4397-4400

  Shen, Shun Qing ^a  

^a INSTITUTE OF PHYSICS   (China)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 1542515913     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.54.4397     Document Type: Article

References (12)

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4. K. Ueda, H. Tsunetsugu and M. Sigrist, Phys. Rev. Lett. 68, 1030 (1992), showed that the ground state is a singlet when (Formula presented)=0 on a Kondo lattice by using Lieb's result.
5. F.-C. Pu and S.-Q. Shen, Phys. Rev. B 50, 16t086 (1994).
6. E. H. Lieb and D. C. Mattis, J. Math. Phys. 3, 749 (1962); also see the remark in Ref. 6 in Ref. 1.
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8. J. R. Schrieffer and P. A. Wolff, Phys. Rev. 149, 491 (1966).
9. T. Yanagisawa and Y. Shimoi, Phys. Rev. Lett. 74, 4939 (1995), proved the nondegeneracy of the ground state in a special case with (Formula presented)=U>|J|/4 and J<0, but their proof is incomplete and they incorrectly concluded that the total spin is zero in the ground state of a Kondo lattice.
10. R. Strack and D. Vollhardt, Phys. Rev. Lett. 72, 3425 (1994).
11. J. de Boer and A. Schaschneider, Phys. Rev. Lett. 75, 4298 (1995).
12. S.-Q. Shen, Phys. Rev. B 53, 14t298 (1996).