Field-Controlled Luttinger Liquid and Possible Crossover into Spin Liquid in Strong-Rail Ladder Systems

被引：5
作者：
Ding, Lin-Jie [1 ,2 ]
Yao, Kai-Lun [1 ,2 ,3 ]
Fu, Hua-Hua [1 ,2 ]
机构：
[1] Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China
[2] Huazhong Univ Sci & Technol, Wuhan High Magnet Field Ctr, Wuhan 430074, Peoples R China
[3] Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110015, Peoples R China
来源：
CHEMPHYSCHEM | 2010年 / 11卷 / 15期
基金：
美国国家科学基金会; 中国国家自然科学基金;
关键词：
exchange interactions; magnetic properties phase diagrams; phase transitions; thermodynamics; THERMODYNAMIC PROPERTIES; THERMAL-CONDUCTIVITY; MAGNETIC-PROPERTIES; CHAIN; MODEL; SALTS;
D O I：
10.1002/cphc.201000410
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The thermodynamics and transport properties of strong-rail ladder systems are investigated by means of Greens function theory. It is shown that the magnetic behavior clearly Manifests a typical antiferromagnetism with gapped or gapless low lying excitations, which is in agreement with the experimental results. In addition, the temperature-field-induced phase diagram is explored, and we demonstrate a Luttinger liquid behavior in the window h(c) (marking the ending of the M=0 plateau) < h < h(s) (saturation magnetic field) within a narrow range of temperature. The spin liquid phase is uncovered for h < h, upon cooling down to zero temperature. It is also shown that the rung entanglement entropy is a good indicator for detecting the field-driven quantum criticality. Meanwhile, the magnetic sus, ceptibility, the specific heat, and the thermal (spin) Drude weights are calculated to characterize the plentiful quantum phases, in which the thermal insulating and conducting behaviors can be controlled by magnetic fields.
引用
收藏
页码：3291 / 3298
页数：8
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