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Title: Giant semiclassical magnetoresistance in high mobility TaAs{sub 2} semimetal

We report the observation of colossal positive magnetoresistance (MR) in single crystalline, high mobility TaAs{sub 2} semimetal. The excellent fit of MR by a single quadratic function of the magnetic field B over a wide temperature range (T = 2–300 K) suggests the semiclassical nature of the MR. The measurements of Hall effect and Shubnikov-de Haas oscillations, as well as band structure calculations, suggest that the giant MR originates from the nearly perfectly compensated electrons and holes in TaAs{sub 2}. The quadratic MR can even exceed 1 200 000% at B = 9 T and T = 2 K, which is one of the largest values among those of all known semi-metallic compounds, including the very recently discovered WTe{sub 2} and NbSb{sub 2}. The giant positive magnetoresistance in TaAs{sub 2} not only has a fundamentally different origin from the negative colossal MR observed in magnetic systems but also provides a nice complemental system that will be beneficial for applications in magnetoelectronic devices.
Authors:
 [1] ;  [2] ; ; ; ; ; ; ; ;  [1] ;  [3] ;  [1] ;  [2]
  1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China)
  2. (China)
  3. Department of Physics, Center for Optoelectronics Materials and Devices, Zhejiang Sci-Tech University, Hangzhou 310018 (China)
Publication Date:
OSTI Identifier:
22489359
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 108; Journal Issue: 4; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; HALL EFFECT; MAGNETIC FIELDS; MAGNETORESISTANCE; MONOCRYSTALS; OSCILLATIONS; SEMIMETALS; TEMPERATURE RANGE 0000-0013 K; TEMPERATURE RANGE 0013-0065 K; TEMPERATURE RANGE 0065-0273 K; TEMPERATURE RANGE 0273-0400 K