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arXiv · 1205.4635

Linear magnetoresistance in topological insulators: Quantum phase coherence effects at high temperatures

Badih A. Assaf·Thomas Cardinal·Peng Wei·Ferhat Katmis·Jagadeesh S. Moodera·Don Heiman
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Abstract

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=14T the slope of this linear-like MR is nearly independent of temperature over the range T=7 to 150K. 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.

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Badih A. Assaf, Thomas Cardinal, Peng Wei, Ferhat Katmis, Jagadeesh S. Moodera, Don Heiman. 2012-05-21. Linear magnetoresistance in topological insulators: Quantum phase coherence effects at high temperatures. https://doi.org/10.1063/1.4773207

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