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Correlation of crystal quality and extreme magnetoresistance of WTe2

Author(s): Ali, Mazhar N; Schoop, Leslie M; Xiong, Jun; Flynn, Steven; Gibson, Quinn; et al

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Abstract: 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
Publication Date: Jun-2015
Electronic Publication Date: 29-Jun-2015
Citation: Ali, Mazhar N, Schoop, Leslie, Xiong, Jun, Flynn, Steven, Gibson, Quinn, Hirschberger, Max, Ong, NP, Cava, RJ. (2015). Correlation of crystal quality and extreme magnetoresistance of WTe2. EPL, 110 (10.1209/0295-5075/110/67002
DOI: doi:10.1209/0295-5075/110/67002
ISSN: 0295-5075
EISSN: 1286-4854
Type of Material: Journal Article
Journal/Proceeding Title: EPL
Version: Final published version. This is an open access article.

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