Magnetic properties of bi-, tri- and multicrystals of 3D topological insulator Bi1-x-Sbx (0.06 ≤ x ≤ 0.2)

被引：3

作者：

Muntyanu, F. M. ^{[1
,2
]}

Gilewski, A. ^{[2
]}

Nenkov, K. ^{[2
,3
]}

Rogacki, K. ^{[2
,4
]}

Zaleski, A. J. ^{[4
]}

Fuks, G. ^{[2
,3
]}

Chistol, V. ^{[5
]}

机构：

[1] Moldavian Acad Sci, Inst Elect Engn & Ind Technol, Kishinev 2028, Moldova

[2] Int Lab High Magnet Fields & Low Temp, PL-53421 Wroclaw, Poland

[3] Leibniz Inst Festkorper & Werkstofforsch, D-01171 Dresden, Germany

[4] Polish Acad Sci, Inst Low Temp & Struct Res, PL-50950 Wroclaw, Poland

[5] Tech Univ Moldova, Kishinev 2004, Moldova

来源：

PHYSICS LETTERS A | 2014年 / 378卷 / 16-17期

关键词：

Bismuth-antimony alloys; 3D topological insulator; Superconducting crystallite interfaces; Dirac electrons; TEMPERATURE; TRICRYSTALS; BICRYSTALS; ALLOYS; SPIN;

D O I：

10.1016/j.physleta.2014.02.033

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The magnetic properties of bi-, tri- and multicrystals of 3D topological insulator Bi1-xSbx (0.06 < x < 0.22) were studied in the temperature range 1.6-300 K and fields up to 70 kOe using an SQUID magnetometer. Two superconducting phases associated with adjacent and central layers of the crystallite interfaces of the bicrystals are identified. It has been found that due to the different stress structure the transition temperature T-c for one superconducting phase changes considerably, from 8.3 to 36 K, while for another superconducting phase, Tc remains within the range 3.7-4.6 K. In tricrystals and bicrystals with high contents of structural disorder and topological defects, ferromagnetic hysteresis loops and magnetic field expulsion have been observed simultaneously. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：1213 / 1216

页数：4