paper

Appearance of T $_{d}^{*}$ phase across the T $_{d}$ -1T $^{'}$ phase boundary in Weyl semimetal MoTe $_{2}$

arXiv:1902.06799 · doi:10.1103/PhysRevB.100.100101

Abstract

Using elastic neutron scattering on single crystals of MoTe $_{2}$ and Mo $_{1 - x}$ W $_{x}$ Te $_{2}$ ( $x ≲ 0.01$ ), the temperature dependence of the recently discovered T $_{d}^{*}$ phase, present between the low temperature orthorhombic T $_{d}$ phase and high temperature monoclinic 1T $^{'}$ phase, is explored. The T $_{d}^{*}$ phase appears only on warming from T $_{d}$ and is observed in the hysteresis region prior to the 1T $^{'}$ transition. This phase consists of four layers in its unit cell, and is constructed by an "AABB" sequence of layer stacking operations rather than the "AB" and "AA" sequences of the 1T $^{'}$ and T $_{d}$ phases, respectively. Though the T $_{d}^{*}$ phase emerges without disorder on warming from T $_{d}$ , on cooling from 1T $^{'}$ diffuse scattering is observed that suggests a frustrated tendency toward the "AABB" stacking.

Supplement included as separate file

Appearance of Td∗​ phase across the Td​-1T′ phase boundary in Weyl semimetal MoTe2​

Abstract

Appearance of T $_{d}^{*}$ phase across the T $_{d}$ -1T $^{'}$ phase boundary in Weyl semimetal MoTe $_{2}$