Thermoelectric current in topological insulator nanowires with impurities

被引：7

作者：

Erlingsson, Sigurdur I. ^{[1
]}

Bardarson, Jens H. ^{[2
]}

Manolescu, Andrei ^{[1
]}

机构：

[1] Reykjavik Univ, Sch Sci & Engn, Menntavegur 1, IS-101 Reykjavik, Iceland

[2] KTH Royal Inst Technol, Dept Phys, SE-10691 Stockholm, Sweden

来源：

BEILSTEIN JOURNAL OF NANOTECHNOLOGY | 2018年 / 9卷

关键词：

topological insulators; nanowires; thermoelectric current; COULOMB-BLOCKADE OSCILLATIONS; QUANTUM-DOT; MAGNETIC-FIELD; THERMOPOWER; SUPERLATTICES; NANORIBBONS; ELECTRONS; REGIME; STATES;

D O I：

10.3762/bjnano.9.107

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this paper we consider charge current generated by maintaining a temperature difference over a nanowire at zero voltage bias. For topological insulator nanowires in a perpendicular magnetic field the current can change sign as the temperature of one end is increased. Here we study how this thermoelectric current sign reversal depends on the magnetic field and how impurities affect the size of the thermoelectric current. We consider both scalar and magnetic impurities and show that their influence on the current are quite similar, although the magnetic impurities seem to be more effective in reducing the effect. For moderate impurity concentration the sign reversal persists.

引用

页码：1156 / 1161

页数：6

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