Emergence of topologically protected states in MoTe${}_2$ Weyl semimetal with layer stacking order

Abstract

Electronic tunability in crystals with weakly-bound layers can be achieved through layer stacking order. One such example is MoTe${}_2$, where the low-temperature orthorhombic T${}_d$ phase is topological and host to Weyl quasiparticles. The transition mechanism to the non-trivial topology is elucidated by single crystal neutron diffraction. Upon cooling from the monoclinic 1T$\prime$ 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.

arXiv commentThis paper contains 8 pages including references and supplement materials. 3 figures and 1 table

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Cited by in corpus (5)

• T${}_d$ to 1T${}^{\prime }$ structural phase transition in WTe${}_2$ Weyl semimetal
• Appearance of T${}_d^{\ast }$ phase across the T${}_d$-1T${}^{\prime }$ phase boundary in Weyl semimetal MoTe${}_2$
• Topological phase transition in MoTe${}_2$: A Review
• Evolution of the structural transition in Mo${}_{1-x}$W${}_x$Te${}_2$
• Large change of interlayer vibrational coupling with stacking in Mo${}_{1-x}$W${}_x$Te${}_2$