Correlation of crystal quality and extreme magnetoresistance of WTe2

被引：103

作者：

Ali, Mazhar N. ^{[1
]}

Schoop, Leslie ^{[1
]}

Xiong, Jun ^{[2
,3
]}

Flynn, Steven ^{[1
]}

Gibson, Quinn ^{[1
]}

Hirschberger, Max ^{[2
,3
]}

Ong, N. P. ^{[2
,3
]}

Cava, R. J. ^{[1
]}

机构：

[1] Princeton Univ, Dept Chem, Princeton, NJ 08544 USA

[2] Princeton Univ, Joseph Henry Labs, Princeton, NJ 08544 USA

[3] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA

来源：

EPL | 2015年 / 110卷 / 06期

基金：

美国国家科学基金会;

关键词：

COLOSSAL MAGNETORESISTANCE; GIANT MAGNETORESISTANCE;

D O I：

10.1209/0295-5075/110/67002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

High-quality single crystals of WTe2 were grown using a Te flux followed by a cleaning step involving self-vapor transport. The method is reproducible and yields consistently higher-quality single crystals than are typically obtained via halide-assisted vapor transport methods. Magnetoresistance (MR) values at 9 tesla and 2 kelvin as high as 1.75million %, nearly an order of magnitude higher than previously reported for this material, were obtained on crystals with residual resistivity ratio (RRR) of approximately 1250. The MR follows a near B-2 law (B = 1.95(1)) and, assuming a semiclassical model, the average carrier mobility for the highest-quality crystal was found to be 167, 000 cm(2)/Vs at 2K. A correlation of RRR, MR ratio and average carrier mobility (mu(avg)) is found with the cooling rate during the flux growth. editor's choice Copyright (C) EPLA, 2015

引用

页数：4

共 21 条

[1] 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-+

[2]

[Anonymous], 2015, ARXIV150200251

[3]

Cai P., 2014, ARXIV14128298

[4] MAGNETORESISTANCE VALUES EXCEEDING 21-PERCENT IN SYMMETRICAL SPIN VALVES [J].

EGELHOFF, WF ;

HA, T ;

MISRA, RDK ;

KADMON, Y ;

NIR, J ;

POWELL, CJ ;

STILES, MD ;

MCMICHAEL, RD ;

LIN, CL ;

SIVERTSEN, JM ;

JUDY, JH ;

TAKANO, K ;

BERKOWITZ, AE ;

ANTHONY, TC ;

BRUG, JA .

JOURNAL OF APPLIED PHYSICS, 1995, 78 (01) :273-277

[5] Magnetotransport of single crystalline NbAs [J].

Ghimire, N. J. ;

Luo, Yongkang ;

Neupane, M. ;

Williams, D. J. ;

Bauer, E. D. ;

Ronning, F. .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2015, 27 (15)

[6]

Jiang J., 2015, ARXIV150301422

[7] COLOSSAL MAGNETORESISTANCE IN LA-CA-MN-O FERROMAGNETIC THIN-FILMS (INVITED) [J].

JIN, S ;

MCCORMACK, M ;

TIEFEL, TH ;

RAMESH, R .

JOURNAL OF APPLIED PHYSICS, 1994, 76 (10) :6929-6933

[8]

Kang D., 2015, ARXIV150200493

[9] Raman scattering investigation of large positive magnetoresistance material WTe2 [J].

Kong, W-D. ;

Wu, S-F. ;

Richard, P. ;

Lian, C-S. ;

Wang, J-T. ;

Yang, C-L. ;

Shi, Y-G. ;

Ding, H. .

APPLIED PHYSICS LETTERS, 2015, 106 (08)

[10] Ultrahigh mobility and giant magnetoresistance in the Dirac semimetal Cd3As2 [J].

Liang, Tian ;

Gibson, Quinn ;

Ali, Mazhar N. ;

Liu, Minhao ;

Cava, R. J. ;

Ong, N. P. .

NATURE MATERIALS, 2015, 14 (03) :280-284

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