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Publication

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

Publication Type
Journal
Journal Name
Physical Review B
Publication Date
Page Number
161105
Volume
99
Issue
16

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 Td 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 Td phase, diffuse scattering accompanies the transition, arising from random, in-plane layer displacements, and dissipates upon entering the Td 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.