EFFECTIVE HAMILTONIAN FOR CUPRATE SUPERCONDUCTORS

被引：42

作者：

BATISTA, CD ^{[1
]}

ALIGIA, AA ^{[1
]}

机构：

[1] COMIS NACL ENERGIA ATOM,INST BALSEIRO,RA-8400 BARILOCHE,ARGENTINA

来源：

PHYSICAL REVIEW B | 1993年 / 47卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.47.8929

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We compare numerical results of 0 and Cu occupations and optical and magnetic excitations for the three-band Hubbard model in a Cu4O8 cluster, with those obtained with an effective Hamiltonian H(eff) in which the Cu-O hopping t(pd) is eliminated by means of a canonical transformation. This transformation up to order t(pd)4 is not quantitatively valid when the relevant energy differences are of the order of square-root 8 t(pd) Or less. However an H(eff) with the form of the second-order one, but which retains all higher-order terms contained in a CuO4 (Cu2O7) Cluster for zero or one added hole (one added electron) to the undoped system, leads to a very good agreement with the results using the full Hilbert space. This H(eff) makes possible the numerical study of the three-band Hubbard model for realistic parameters, using larger clusters.

引用

页码：8929 / 8935

页数：7

共 41 条

[1] ELECTRONICALLY DRIVEN INSTABILITIES OF LA2-XMXCUO4 [J].

ALIGIA, AA .

PHYSICAL REVIEW B, 1989, 39 (10) :6700-6707

[2] PAIRING MECHANISM IN BI-O SUPERCONDUCTORS - A FINITE-SIZE CHAIN CALCULATION [J].

ALIGIA, AA ;

REGUEIRO, MDN ;

GAGLIANO, ER .

PHYSICAL REVIEW B, 1989, 40 (07) :4405-4412

[3] ELECTRONIC HAMILTONIAN AND ANTIFERROMAGNETIC INTERACTIONS IN LA2CUO4 [J].

ANNETT, JF ;

MARTIN, RM ;

MCMAHAN, AK ;

SATPATHY, S .

PHYSICAL REVIEW B, 1989, 40 (04) :2620-2623

[4] ELECTRONIC-PROPERTIES OF HIGH-TC SUPERCONDUCTORS [J].

BALSEIRO, CA ;

AVIGNON, M ;

ROJO, AG ;

ALASCIO, B .

PHYSICAL REVIEW LETTERS, 1989, 62 (22) :2624-2627

[5] VALIDITY OF THE T-J MODEL - QUANTUM NUMBERS FOR (CU4O8)-7 [J].

BATISTA, C ;

ALIGIA, AA .

SOLID STATE COMMUNICATIONS, 1992, 83 (06) :419-422

[6]

CHUBUKOV A, 1992, PHYS REV B, V45, P4889

[7] DIRECT COMPARISON OF ANGLE-RESOLVED PHOTOEMISSION AND NUMERICAL SIMULATIONS FOR HIGH-TC SUPERCONDUCTORS [J].

DOPF, G ;

WAGNER, J ;

DIETERICH, P ;

MURAMATSU, A ;

HANKE, W .

PHYSICAL REVIEW LETTERS, 1992, 68 (13) :2082-2085

[8] CONSISTENT DESCRIPTION OF HIGH-TC SUPERCONDUCTORS WITH THE 3-BAND HUBBARD-MODEL [J].

DOPF, G ;

MURAMATSU, A ;

HANKE, W .

PHYSICAL REVIEW LETTERS, 1992, 68 (03) :353-356

[9]

Elesin V. F., 1992, Soviet Physics - JETP, V74, P363

[10] QUASIPARTICLES IN THE COPPER-OXYGEN PLANES OF HIGH-TC SUPERCONDUCTORS - AN EXACT SOLUTION FOR A FERROMAGNETIC BACKGROUND [J].

EMERY, VJ ;

REITER, G .

PHYSICAL REVIEW B, 1988, 38 (16) :11938-11941

← 1 2 3 4 5 →