Misorientation-angle-dependent electrical transport across molybdenum disulfide grain boundaries.

ABSTRACT: Grain boundaries in monolayer transition metal dichalcogenides have unique atomic defect structures and band dispersion relations that depend on the inter-domain misorientation angle. Here, we explore misorientation angle-dependent electrical transport at grain boundaries in monolayer MoS2 by correlating the atomic defect structures of measured devices analysed with transmission electron microscopy and first-principles calculations. Transmission electron microscopy indicates that grain boundaries are primarily composed of 5-7 dislocation cores with periodicity and additional complex defects formed at high angles, obeying the classical low-angle theory for angles <22°. The inter-domain mobility is minimized for angles <9° and increases nonlinearly by two orders of magnitude before saturatin

SUBMITTER: Ly TH 

PROVIDER: S-EPMC4737806 | biostudies-literature | 2016 Jan

REPOSITORIES: biostudies-literature