Journal
APPLIED PHYSICS LETTERS
Volume 102, Issue 1, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4773207
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Funding
- National Science Foundation [DMR-0907007]
- MRSEC of the National Science Foundation [DMR-0819762]
- NSF [DMR-0504158, ONR-N00014-09-1-0177]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1207469] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0907007] Funding Source: National Science Foundation
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In addition to the weak antilocalization cusp observed in the magnetoresistance (MR) of topological insulators at low temperatures and low magnetic fields, we find that the high-field MR in Bi2Te2Se is linear in field. At fields up to B = 14 T, the slope of this linear-like MR is nearly independent of temperature over the range T = 7 to 150 K. We find that the linear MR arises from the competition between a logarithmic phase coherence component and a quadratic component. The quantum phase coherence dominates up to high temperatures, where the coherence length remains longer than the mean free path of electrons. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4773207]
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