Andreev scattering in the asymmetric ladder with preformed bosonic pairs

Physical Review B - Condensed Matter and Materials Physics

Volumn 64, Issue 6, 2001, Pages

  Le Hur, Karyn ^a  

^a UNIVERSITY OF GENEVA   (Switzerland)

Author keywords

[No Author keywords available]

Indexed keywords

COPPER COMPLEX;

ARTICLE; CALCULATION; CONDUCTANCE; CONDUCTOR; CORRELATION FUNCTION; ELECTRON; LIGHT SCATTERING; PLOTS AND CURVES;

EID: 0035421633     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.64.060502     Document Type: Article

References (23)

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4. Phys. Rev. BU. Ledermann, K. Le Hur, and T M. Rice, 62, 16 383 (2000).
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12. A O. Gogolin, Bosonization and Strongly Correlated Systems (Cambridge University Press, Cambridge 1998).
13. We neglect corrections to the Fermi velocity for chain 1.
14. We have (formula presented) and (formula presented) (formula presented) where (formula presented) is the (formula presented) part of the grand partition function.
15. D V. Khveshchenko and T M. Rice, Phys. Rev. B50, 252 (1994).
16. Taking into account second order corrections to (formula presented) and (formula presented) would not change the further conclusions.
17. For repulsive interactions in chain 2, the rotation invariance implies that for (formula presented) (formula presented) (formula presented)
18. The term (formula presented) produces a coupling (formula presented) This would lead to a spin-gapped CDW ground state (formula presented)
19. For (formula presented) in Eqs. (16) and (18) one must formally replace (formula presented) and equate (formula presented) (formula presented)
20. Similarly, we obtain (formula presented)The two-point correlation functions of the disordered field (formula presented) decay exponentially (its dual field is pinned), therefore, (formula presented) (in contrast with Ref. 7).
21. K. Le Hur (unpublished).
22. But the stability of the “C2S1” phase in the symmetric three-leg Hubbard ladder (or three-band Hubbard model) of Ref. 3 is clear. Starting from the half-filled case, the unpaired fermions of band 2 have been found to be completely decoupled from bands 1 and 3 (which contain the bosonic pairs). Adding (by hand) a scattering term of the form (formula presented)would not affect the fixed point since (formula presented)
23. V J. Emery, Phys. Rev. B59, 15 641 (1999).