Pressure induced anisotropy of electrical conductivity in polycrystalline molybdenum disulfide

摘要

Anisotropic specimens of MoS2 are obtained by pressing the microcrystalline powderudinto special die. This inelastic compression results in a rearrangement of theuddisulfide micro platelets observed by Atomic Force Microscopy and reflected in theudmacroscopic anisotropy in electrical conductivity in these samples. The conductivityudmeasured parallel and perpendicular to the direction of applied pressure exhibitsudan anisotropy factor of ∼10 at 1 GPa. This behaviour of the conductivity as a functionudof applied pressure is explained as the result of the simultaneous influence of audrearrangement of the micro platelets in the solid and the change of the inter-grainuddistances.