Phase separation, charge-transfer instability, and superconductivity in the three-band extended Hubbard model: Weak-coupling theory
作者： Yunkyu Bang , G. Kotliar , C. Castellani , M. Grilli , R. Raimondi
DOI: 10.1103/PHYSREVB.43.13724
关键词: Instability 、 Phase diagram 、 Superconductivity 、 Variational method 、 Hubbard model 、 Condensed matter physics 、 Coupling 、 Hartree–Fock method 、 S-wave 、 Physics
摘要: We study the interplay of charge-transfer instability and phase separation in three-band model using Hartree-Fock variational method for values interaction couplings comparable to bandwidth. establish that occurs near region where previous weak-coupling calculations found {ital s}-wave superconductivity a instability.
osti.gov
sci-hub.se 参考文章(8)
V. J. Emery, Theory of high-Tcsuperconductivity in oxides Physical Review Letters. ,vol. 58, pp. 2794- 2797 ,(1987) , 10.1103/PHYSREVLETT.58.2794
J. E. Hirsch, E. Loh, D. J. Scalapino, S. Tang, Pairing interaction in CuO clusters. Physical Review B. ,vol. 39, pp. 243- 253 ,(1989) , 10.1103/PHYSREVB.39.243
S A Trugman, Ground state instability and attractive interactions in the extended Hubbard model Physica Scripta. ,vol. 1989, pp. 113- 116 ,(1989) , 10.1088/0031-8949/1989/T27/020
P. B. Littlewood, C. M. Varma, S. Schmitt-Rink, E. Abrahams, Collective excitations in the normal state of Cu-O-based superconductors. Physical Review B. ,vol. 39, pp. 12371- 12374 ,(1989) , 10.1103/PHYSREVB.39.12371
R. Putz, B. Ehlers, L. Lilly, A. Muramatsu, W. Hanke, Superconducting pairing of the extended multiband Hubbard model: A weak-coupling study Physical Review B. ,vol. 41, pp. 853- 856 ,(1990) , 10.1103/PHYSREVB.41.853
P. B. Littlewood, C. M. Varma, E. Abrahams, Pairing instabilities of the extended Hubbard model for Cu-O–based superconductors Physical Review Letters. ,vol. 63, pp. 2602- 2605 ,(1989) , 10.1103/PHYSREVLETT.63.2602
Yunkyu Bang, Khandker Quader, Elihu Abrahams, Peter B. Littlewood, Pairing by dynamic charge fluctuations in the extended Hubbard model Physical Review B. ,vol. 42, pp. 4865- 4868 ,(1990) , 10.1103/PHYSREVB.42.4865
M. Grilli, R. Raimondi, C. Castellani, C. Di Castro, G. Kotliar, PHASE SEPARATION AND SUPERCONDUCTIVITY IN THE U=∞ LIMIT OF THE EXTENDED MULTIBAND HUBBARD MODEL International Journal of Modern Physics B. ,vol. 5, pp. 309- 321 ,(1991) , 10.1142/S0217979291000195