PAIRING AND EXCITATION SPECTRUM IN DOPED T-J LADDERS

被引：142

作者：

TSUNETSUGU, H

TROYER, M

RICE, TM

机构：

[1] SWISS FED INST TECHNOL,INTERDISZIPLINARES PROJEKTZENTRUM SUPERCOMP,CH-8092 ZURICH,SWITZERLAND

[2] CTR SVIZZERO CALCOLO SCI,CH-6924 MANNO,SWITZERLAND

来源：

PHYSICAL REVIEW B | 1994年 / 49卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.49.16078

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Exact-diagonalization studies for a doped t-J ladder (or double chain) show hole pairing in the ground state. The excitation spectrum separates into a limited number of quasiparticles which carry charge +\e\ and spin 1/2 and a triplet mode. At half-filling the former vanish but the latter evolves continuously into the triplet band of the spin liquid. At low doping the quasiparticles form a dilute Fermi gas with a strong attraction but simultaneously the Fermi wave vector, as would be measured in photoemission, is large.

引用

页码：16078 / 16081

页数：4

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