Vison-Majorana complex zero-energy resonance in the Kitaev spin liquid

被引：21

作者：

Udagawa, Masafumi ^{[1
]}

机构：

[1] Gakushuin Univ, Dept Phys, Toshima Ku, Tokyo 1718588, Japan

来源：

PHYSICAL REVIEW B | 2018年 / 98卷 / 22期

关键词：

QUANTUM; ANYONS;

D O I：

10.1103/PhysRevB.98.220404

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the effect of site dilution in the Kitaev model. We derive an analytical solution of the dynamical spin correlation functions for arbitrary configurations of Z(2) fluxes. By incorporating this solution into a classical Monte Carlo scheme, we address how a site vacancy affects the experimental observables, such as the static spin susceptibility and the spin-lattice relaxation rate, 1/T-1. As a result, we found an enhancement of dynamical magnetic response in the vicinity of vacancy, which leads to Friedel-like oscillation in local 1/T-1, in contrast to limited influences on the static susceptibility. Furthermore, we found a sharp zero-energy peak in the magnetic excitation spectrum, which is attributed to the Vison-Majorana zero mode trapped near the site vacancy. This zero mode can be interpreted as a fractionalized spin hole into an Ising triplet with differentiated magnetic axes, which leads to the characteristic temperature and field-orientational dependence of 1/T-1.

引用

页数：5

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