Dynamical merging of Dirac points in the periodically driven Kitaev honeycomb model

被引：10

作者：

Bhattacharya, Utso ^{[1
]}

Dasgupta, Sayak ^{[2
]}

Dutta, Amit ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Phys, Kanpur 208016, Uttar Pradesh, India

[2] Johns Hopkins Univ, Dept Phys & Astron, 3400 N Charles St, Baltimore, MD 21218 USA

来源：

EUROPEAN PHYSICAL JOURNAL B | 2016年 / 89卷 / 10期

关键词：

FLOQUET TOPOLOGICAL INSULATORS; SYSTEMS; STATES;

D O I：

10.1140/epjb/e2016-70265-5

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We study the effect of a half wave rectified sinusoidal electromagnetic (EM) wave on the Kitaev honeycomb model with an additional magneto-electric coupling term arising due to induced polarization of the bonds. Within the framework of Floquet analysis, we show that merging of a pair of Dirac points in the gapless region of the Kitaev model leading to a semi-Dirac spectrum is indeed possible by externally varying the amplitude and the phase of the EM field.

引用

页数：10

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