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.
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