Emergence of topologically protected states in the MoTe2 Weyl semimetal with layer-stacking order

Article

关键词: CRYSTAL-STRUCTURES;    PHASE-TRANSITION;    DIFFRACTION;   

DOI  :  10.1103/PhysRevB.99.161105

来源: SCIE

【 摘 要 】

Electronic tunability in crystals with weakly bound layers can be achieved through layer stacking order. One such example is MoTe2, where the low-temperature orthorhombic T-d phase is topological and host to Weyl quasiparticles. The transition mechanism to the nontrivial topology is elucidated by single-crystal neutron diffraction. Upon cooling from the monoclinic 1T' to the T-d phase, diffuse scattering accompanies the transition, arising from random, in-plane layer displacements, and dissipates upon entering the T-d phase. Diffuse scattering is observed only in the H0L plane due to irreversible layer shifts along the c axis that break the centrosymmetry of the monoclinic lattice.

【 授权许可】

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