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Electron and thermal transport via Variable Range Hopping in MoSe2 single crystals

Dhavala Suri, R. S. Patel
(Submitted on 8 Jul 2017)

Bulk single crystal Molybdenum diselenide has been studied for its electronic and thermal transport properties. We perform resistivity measurements with current in-plane (CIP) and current perpendicular to plane (CPP) as a function of temperature. The CIP measurements exhibit metal to semiconductor transition at
?31
K. In the semiconducting phase (
T>31
K), the transport is best explained by variable range hopping (VRH) model. Large magnitude of resistivity in CPP mode indicates strong structural anisotropy. Seebeck coefficient as a function of temperature measured in the range
90-300
K, also agrees well with the VRH model. The room temperature Seebeck coefficient is found to be
139
µ
V/K. VRH fittings of the resistivity and Seebeck coefficient data indicate high degree of localization.

https://arxiv.org/abs/1707.02426