Indications for RVB superconductivity in a generalized t-J model for the cuprates

被引：15

作者：

Batista, CD

Aligia, AA

机构：

[1] Centro Atómico Bariloche, Instituto Balseiro, Comn. Nac. de Ener. Atómica

来源：

PHYSICA C | 1996年 / 264卷 / 3-4期

关键词：

D O I：

10.1016/0921-4534(96)00247-X

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We evaluate numerically several superconducting correlation functions in a generalized t-J model derived for hole-doped CuO2 planes. The model includes a three-site term t '' similar to that obtained in the large-U limit of the Hubbard model but of opposite sign for realistic O-O hopping. For parameters close to realistic values, we obtain strong evidence of superconductivity of predominantly d(x2-y2) character. The ground state has a large overlap with a very simple resonating-valence-bond (RVB) wave function with off-diagonal long-range order. This function reproduces the main features of the magnetic and superconducting correlation functions.

引用

收藏

页码：319 / 324

页数：6

相关论文

共 42 条

[21] SPIN LADDERS WITH SPIN GAPS - A DESCRIPTION OF A CLASS OF CUPRATES [J].

GOPALAN, S ;

RICE, TM ;

SIGRIST, M .

PHYSICAL REVIEW B, 1994, 49 (13) :8901-8910

[22] SUPERCONDUCTIVITY IN THE 2-DIMENSIONAL T-J MODEL AT LOW HOLE DOPING [J].

HEEB, ES ;

RICE, TM .

EUROPHYSICS LETTERS, 1994, 27 (09) :673-679

[23] RENORMALIZATION FROM DENSITY-FUNCTIONAL THEORY TO STRONG-COUPLING MODELS FOR ELECTRONIC STATES IN CU-O MATERIALS [J].

HYBERTSEN, MS ;

STECHEL, EB ;

SCHLUTER, M ;

JENNISON, DR .

PHYSICAL REVIEW B, 1990, 41 (16) :11068-11072

[24]

JEFFERSON JJ, 1992, PHYS REV B, V45, P7588

[25] RESONATING VALENCE BONDS AND D-WAVE SUPERCONDUCTIVITY [J].

KOTLIAR, G .

PHYSICAL REVIEW B, 1988, 37 (07) :3664-3666

[26] MAGNETIC-PROPERTIES OF SINGLE-LAYERED CU-OXIDES IN THE EXTENDED T-J MODEL [J].

LERCHER, MJ ;

WHEATLEY, JM .

PHYSICA C, 1993, 215 (1-2) :145-151

[27] MIXED S-WAVE AND D-WAVE SUPERCONDUCTIVITY IN HIGH-TC SYSTEMS [J].

LI, QP ;

KOLTENBAH, BEC ;

JOYNT, R .

PHYSICAL REVIEW B, 1993, 48 (01) :437-455

[28] PAIRING INSTABILITIES OF THE EXTENDED HUBBARD-MODEL FOR CU-O-BASED SUPERCONDUCTORS [J].

LITTLEWOOD, PB ;

VARMA, CM ;

ABRAHAMS, E .

PHYSICAL REVIEW LETTERS, 1989, 63 (23) :2602-2605

[29] TOWARD A THEORY OF HIGH-TEMPERATURE SUPERCONDUCTIVITY IN THE ANTIFERROMAGNETICALLY CORRELATED CUPRATE OXIDES [J].

MONTHOUX, P ;

BALATSKY, AV ;

PINES, D .

PHYSICAL REVIEW LETTERS, 1991, 67 (24) :3448-3451

[30] SPIN-FLUCTUATION-INDUCED SUPERCONDUCTIVITY IN THE COPPER OXIDES - A STRONG COUPLING CALCULATION [J].

MONTHOUX, P ;

PINES, D .

PHYSICAL REVIEW LETTERS, 1992, 69 (06) :961-964

← 1 2 3 4 5 →