THE DOPED 2-CHAIN HUBBARD-MODEL

被引：79

作者：

NOACK, RM ^{[1
]}

WHITE, SR ^{[1
]}

SCALAPINO, DJ ^{[1
]}

机构：

[1] UNIV CALIF SANTA BARBARA,DEPT PHYS,SANTA BARBARA,CA 93016

来源：

EUROPHYSICS LETTERS | 1995年 / 30卷 / 03期

关键词：

D O I：

10.1209/0295-5075/30/3/007

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The properties of the two-chain Hubbard model doped away from half-filling are investigated with the density matrix renormalization group. The charge gap is found to vanish, but a finite spin gap phase exists over a range of interchain hopping strength t(perpendicular to). In this phase, there are modified d(x)2(-y)2 pairing correlations which exhibit a power law decay while both the 2k(F) spin and charge correlations are short range. Above a critical value of t(perpendicular to), the system behaves as a Luttinger liquid.

引用

页码：163 / 168

页数：6

共 18 条

[1] SUPERCONDUCTIVITY IN LADDERS AND COUPLED PLANES [J].

DAGOTTO, E ;

RIERA, J ;

SCALAPINO, D .

PHYSICAL REVIEW B, 1992, 45 (10) :5744-5745

[2] ROLE OF TRANSVERSE HOPPING IN A 2-COUPLED-CHAINS MODEL [J].

FABRIZIO, M .

PHYSICAL REVIEW B, 1993, 48 (21) :15838-15860

[3] STRONG-COUPLING PHASES OF 2 HUBBARD CHAINS WITH INTERCHAIN HOPPING [J].

FABRIZIO, M ;

PAROLA, A ;

TOSATTI, E .

PHYSICAL REVIEW B, 1992, 46 (05) :3159-3162

[4] 2 COUPLED CHAINS WITH TOMONAGA-LUTTINGER INTERACTIONS [J].

FINKELSTEIN, AM ;

LARKIN, AI .

PHYSICAL REVIEW B, 1993, 47 (16) :10461-10473

[5] A NEW HOMOLOGOUS SERIES SRN-1CUN+1O2N FOUND IN THE SRO-CUO SYSTEM TREATED UNDER HIGH-PRESSURE [J].

HIROI, Z ;

AZUMA, M ;

TAKANO, M ;

BANDO, Y .

JOURNAL OF SOLID STATE CHEMISTRY, 1991, 95 (01) :230-238

[6] MAGNETIC-SUSCEPTIBILITY OF (VO)2P2O7 - A ONE-DIMENSIONAL SPIN-1/2 HEISENBERG-ANTIFERROMAGNET WITH A LADDER SPIN CONFIGURATION AND A SINGLET GROUND-STATE [J].

JOHNSTON, DC ;

JOHNSON, JW ;

GOSHORN, DP ;

JACOBSON, AJ .

PHYSICAL REVIEW B, 1987, 35 (01) :219-222

[7] SINGLET PAIRING IN THE DOUBLE-CHAIN T-J MODEL [J].

KHVESHCHENKO, DV .

PHYSICAL REVIEW B, 1994, 50 (01) :380-384

[8] SPIN-GAP FIXED-POINTS IN THE DOUBLE-CHAIN PROBLEM [J].

KHVESHCHENKO, DV ;

RICE, TM .

PHYSICAL REVIEW B, 1994, 50 (01) :252-257

[9] CORRELATIONS IN A 2-CHAIN HUBBARD-MODEL [J].

NOACK, RM ;

WHITE, SR ;

SCALAPINO, DJ .

PHYSICAL REVIEW LETTERS, 1994, 73 (06) :882-885

[10]

NOACK RM, UNPUB

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