期刊论文详细信息
Two-hole and four-hole bound states in a t-J ladder at half-filling | |
Article | |
关键词: SUPERCONDUCTING CORRELATIONS; HEISENBERG ANTIFERROMAGNETS; 2-LEG LADDERS; SPIN-LIQUID; J MODEL; DYNAMICS; EXPANSIONS; | |
DOI : 10.1103/PhysRevB.66.085112 | |
来源: SCIE |
【 摘 要 】
The two-hole excitation spectrum of the t-J ladder at half-filling is studied using linked-cluster series expansion methods. A rich spectrum of bound states emerges, particularly at small t/J. Their dispersion relations and coherence lengths are computed, along with the threshold behavior as the bound states merge into the continuum. A class of four-hole bound states is also studied, leading to the conclusion that phase separation occurs for t/Jless than or similar to0.5, in agreement with other studies.
【 授权许可】
Free