Unusually flat hole dispersion relation in the two-dimensional Hubbard model and restoration of coherence by addition of pair-hopping processes

被引：22

作者：

Assaad, FF

Imada, M

机构：

[1] Univ Stuttgart, Inst Theoret Phys 3, D-70550 Stuttgart, Germany

[2] Univ Tokyo, Inst Solid State Phys, Minato Ku, Tokyo 106, Japan

来源：

EUROPEAN PHYSICAL JOURNAL B | 1999年 / 10卷 / 04期

关键词：

D O I：

10.1007/s100510050891

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The dispersion relation of a doped hole in the half-filled 2D Hubbard model is shown to follow a \k\(4) law around the (0, +/-pi) and (+/-pi,0) points in the Brillouin zone, Upon addition of pair-hopping processes this dispersion relation is unstable towards a \k\(2) law. The above follows from T = 0 Quantum Monte-Carlo calculations of the single particle spectral function A(k,omega) on 16 x 16 lattices. We discuss finite dopings and argue that the added term restores coherence to charge dynamics and drives the system towards a d(x2-y2) superconductor.

引用

收藏

页码：595 / 598

页数：4

相关论文

共 26 条

[1] Stable Quantum Monte Carlo algorithm for T=0 calculation of imaginary time Green functions [J].

Assaad, FF ;

Imada, M .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1996, 65 (01) :189-194

[2] Quantum transition between an antiferromagnetic Mott insulator and d(x2-y2) superconductor in two dimensions [J].

Assaad, FF ;

Imada, M ;

Scalapino, DJ .

PHYSICAL REVIEW LETTERS, 1996, 77 (22) :4592-4595

[3] Doping-induced metal-insulator transition in two-dimensional Hubbard t-U and extended Hubbard t-U-W models [J].

Assaad, FF ;

Imada, M .

PHYSICAL REVIEW B, 1998, 58 (04) :1845-1852

[4] Charge and spin structures of a dx(2)-y(2) superconductor in the proximity of an antiferromagnetic Mott insulator [J].

Assaad, FF ;

Imada, M ;

Scalapino, DJ .

PHYSICAL REVIEW B, 1997, 56 (23) :15001-15014

[5] Insulator-metal transition in the one- and two-dimensional hubbard models [J].

Assaad, FF ;

Imada, M .

PHYSICAL REVIEW LETTERS, 1996, 76 (17) :3176-3179

[6]

ASSAAD FF, 1998, HIGH PERFORMANCE COM

[7] SINGLE-PARTICLE EXCITATIONS IN MAGNETIC INSULATORS [J].

BRINKMAN, WF ;

RICE, TM .

PHYSICAL REVIEW B-SOLID STATE, 1970, 2 (05) :1324-+

[8] FLAT QUASI-PARTICLE DISPERSION IN THE 2D T-J MODEL [J].

DAGOTTO, E ;

NAZARENKO, A ;

BONINSEGNI, M .

PHYSICAL REVIEW LETTERS, 1994, 73 (05) :728-731

[9] Doping-dependent quasiparticle band structure in cuprate superconductors [J].

Eder, R ;

Ohta, Y ;

Sawatzky, GA .

PHYSICAL REVIEW B, 1997, 55 (06) :R3414-R3417

[10] OBSERVATION OF AN EXTENDED VAN-HOVE SINGULARITY IN YBA2CU4O8 BY ULTRAHIGH-ENERGY RESOLUTION ANGLE-RESOLVED PHOTOEMISSION [J].

GOFRON, K ;

CAMPUZANO, JC ;

ABRIKOSOV, AA ;

LINDROOS, M ;

BANSIL, A ;

DING, H ;

KOELLING, D ;

DABROWSKI, B .

PHYSICAL REVIEW LETTERS, 1994, 73 (24) :3302-3305