Fermi surface topology and negative longitudinal magnetoresistance observed in the semimetal NbAs2

被引：83

作者：

Shen, Bing ^{[1
,2
]}

Deng, Xiaoyu ^{[3
]}

Kotliar, Gabriel ^{[3
]}

Ni, Ni ^{[1
,2
]}

机构：

[1] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA

[2] Univ Calif Los Angeles, Calif NanoSyst Inst, Los Angeles, CA 90095 USA

[3] Rutgers State Univ, Dept Phys & Astron, POB 849, Piscataway, NJ 08854 USA

来源：

PHYSICAL REVIEW B | 2016年 / 93卷 / 19期

基金：

美国国家科学基金会;

关键词：

GIANT MAGNETORESISTANCE; WEYL;

D O I：

10.1103/PhysRevB.93.195119

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report transverse and longitudinal magnetotransport properties of NbAs2 single crystals. Attributing to the electron-hole compensation, nonsaturating large transverse magnetoresistance reaches up to 8000 at 9 T at 1.8 K with mobility around 1 to 2 m(2) V-1 S-1. We present a thorough study of angular-dependent Shubnikov-de Haas (SdH) quantum oscillations of NbAs2. Three distinct oscillation frequencies are identified. First-principles calculations reveal four types of Fermi-surface pockets: electron alpha pocket, hole beta pocket, hole gamma pocket, and small electron delta pocket. Although the angular dependence of alpha, beta, and delta agree well with the SdH data, gamma pocket is missing in SdH. Negative longitudinal magnetoresistance is observed which may be linked to novel topological states in this material, although systematic study is necessary to ascertain its origin.

引用

页数：6

共 40 条

[1] THEORETICAL-STUDY OF BONDING AND ELECTRICAL-CONDUCTIVITY IN COMPOUNDS WITH THE NBAS2 STRUCTURE [J].

ALEMANY, P ;

ALVAREZ, S .

INORGANIC CHEMISTRY, 1992, 31 (14) :3007-3010

[2] Large, non-saturating magnetoresistance in WTe2 [J].

Ali, Mazhar N. ;

Xiong, Jun ;

Flynn, Steven ;

Tao, Jing ;

Gibson, Quinn D. ;

Schoop, Leslie M. ;

Liang, Tian ;

Haldolaarachchige, Neel ;

Hirschberger, Max ;

Ong, N. P. ;

Cava, R. J. .

NATURE, 2014, 514 (7521) :205-+

[3] NBAS2 [J].

BENSCH, W ;

HEID, W .

ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS, 1995, 51 :2205-2207

[4]

Blaha P., 2001, Calculating Cryst. Prop., V60

[5] Topological nodal semimetals [J].

Burkov, A. A. ;

Hook, M. D. ;

Balents, Leon .

PHYSICAL REVIEW B, 2011, 84 (23)

[6] Metal-insulator-like behavior in semimetallic bismuth and graphite [J].

Du, X ;

Tsai, SW ;

Maslov, DL ;

Hebard, AF .

PHYSICAL REVIEW LETTERS, 2005, 94 (16)

[7] Axial anomaly and longitudinal magnetoresistance of a generic three-dimensional metal [J].

Goswami, Pallab ;

Pixley, J. H. ;

Das Sarma, S. .

PHYSICAL REVIEW B, 2015, 92 (07)

[8] TEMPERATURE DEPENDENCE OF LOW-FIELD GALVANOMAGNETIC COEFFICIENTS OF BISMUTH [J].

HARTMAN, R .

PHYSICAL REVIEW, 1969, 181 (03) :1070-&

[9] Observation of the Chiral-Anomaly-Induced Negative Magnetoresistance in 3D Weyl Semimetal TaAs [J].

Huang, Xiaochun ;

Zhao, Lingxiao ;

Long, Yujia ;

Wang, Peipei ;

Chen, Dong ;

Yang, Zhanhai ;

Liang, Hui ;

Xue, Mianqi ;

Weng, Hongming ;

Fang, Zhong ;

Dai, Xi ;

Chen, Genfu .

PHYSICAL REVIEW X, 2015, 5 (03)

[10] LOW-TEMPERATURE TRANSPORT-PROPERTIES OF THE GROUP-V SEMIMETALS [J].

ISSI, JP .

AUSTRALIAN JOURNAL OF PHYSICS, 1979, 32 (06) :585-628

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