Twisted coupled wire model for a moiré sliding Luttinger liquid

被引:1
|
作者
Hu, Yichen [1 ]
Xu, Yuanfeng [1 ,2 ,3 ]
Lian, Biao [1 ]
机构
[1] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA
[2] Zhejiang Univ, Ctr Correlated Matter, Hangzhou 310058, Peoples R China
[3] Zhejiang Univ, Sch Phys, Hangzhou 310058, Peoples R China
基金
美国国家科学基金会;
关键词
CORRELATED STATES; INSULATOR;
D O I
10.1103/PhysRevB.110.L201106
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Recent experiments in twisted bilayer WTe2 revealed the existence of anisotropic Luttinger liquid behavior. To generically characterize such anisotropic twisted bilayer systems, we study a model of a twisted bilayer of two-dimensional (2D) arrays of coupled wires, which effectively form an array of coupled moir & eacute; wires. We solve the model by the transfer matrix method, and identify quasi-1D electron bands in the system at small twist angles. With electron interactions added, we show that the moir & eacute; wires have an effective Luttinger parameter g eff lower than that of the microscopic wires. This leads to a sliding Luttinger liquid (SLL) temperature regime, in which power-law current voltage relations arise. For parameters partly estimated from WTe2, a microscopic interaction U 3 eV yields a temperature regime of SLL similar to that in the WTe2 experiments.
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页数:7
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