Evolution of the structural transition in Mo${}_{1-x}$W${}_x$Te${}_2$

Abstract

The composition dependence of the structural transition between the monoclinic 1T${}^{\prime }$ and orthorhombic T${}_d$ phases in the Mo${}_{1-x}$W${}_x$Te${}_2$ Weyl semimetal was investigated by elastic neutron scattering on single crystals up to $x\approx 0.54$. First observed in MoTe${}_2$, the transition from T${}_d$ to 1T${}^{\prime }$ is accompanied by an intermediate pseudo-orthorhombic phase, T${}_d^{\ast }$. Upon doping with W, the T${}_d^{\ast }$ phase vanishes by $x\approx 0.34$. Above this concentration, a phase coexistence behavior with both T${}_d$ and 1T${}^{\prime }$ is observed instead. The interlayer in-plane positioning parameter $\delta$, which relates to the 1T${}^{\prime }$ $\beta$ angle, decreases with temperature as well as with W substitution, likely due to strong anharmonicity in the interlayer interactions. The temperature width of the phase coexistence remains almost constant up to $x\approx 0.54$, in contrast to the broadening reported under pressure.

arXiv commentsupplement in separate file

References in corpus (29)

• Double-slit photoelectron interference in strong-field ionization of the neon dimer
• Experimental observation of topological Fermi arcs in type-II Weyl semimetal MoTe2
• Superconductivity in Weyl Semimetal Candidate MoTe2
• Prediction of the Weyl semimetal in the orthorhombic MoTe2
• Crystal and Magnetic Structures in Layered, Transition Metal Dihalides and Trihalides
• Giant enhancement of interlayer exchange in an ultrathin 2D magnet
• Temperature induced Lifshitz transition in WTe2
• Berry curvature memory through electrically driven stacking transitions
• Discovery of switchable weak topological insulator state in quasi-one-dimensional bismuth iodide
• Engineering the structural and electronic phases of MoTe2 through W substitution
• Hall effect in the extremely large magnetoresistance semimetal WTe${}_2$
• Relation between Kitaev magnetism and structure in $\alpha$-RuCl${}_3$
• Origins of the structural phase transitions in MoTe${}_2$ and WTe${}_2$
• Origin of the superconductivity of WTe2 under pressure
• Critical enhancement of thermopower in a chemically tuned polar semimetal MoTe${}_2$
• Bulk Fermi-surface of the Weyl type-II semi-metallic candidate MoTe2
• Optical properties of the perfectly compensated semimetal WTe${}_2$
• Evolution of Raman spectra in Mo${}_{1-x}$W${}_x$Te${}_2$ alloys
• Anticorrelation between polar lattice instability and superconductivity in the Weyl semimetal candidate MoTe2
• Dimensionality-driven orthorhombic MoTe2 at room temperature
• Elastic and electronic tuning of magnetoresistance in MoTe${}_2$
• Mechanical control of crystal symmetry and superconductivity in Weyl semimetal MoTe${}_2$
• Optical evidence of type-II Weyl semimetals MoTe${}_2$ and WTe${}_2$
• Structural Phase Transitions
• Low-energy excitations in type-II Weyl semimetal Td-MoTe2 evidenced through optical conductivity
• Appearance of T${}_d^{\ast }$ phase across the T${}_d$-1T${}^{\prime }$ phase boundary in Weyl semimetal MoTe${}_2$
• Angular dependence of the upper critical field in the high-pressure $1T^{\prime }$ phase of MoTe${}_2$
• Barkhausen effect in the first order structural phase transition in type-II Weyl semimetal MoTe2
• Emergence of topologically protected states in MoTe${}_2$ Weyl semimetal with layer stacking order

Cited by in corpus (5)

• T${}_d$ to 1T${}^{\prime }$ structural phase transition in WTe${}_2$ Weyl semimetal
• Observation of helimagnetism in the candidate ferroelectric CrI${}_2$
• Pressure-induced creation and annihilation of Weyl points in Td- and 1T"-Mo0.5W0.5Te2
• Helimagnetism in CrBr${}_2$ and CrIBr
• Large change of interlayer vibrational coupling with stacking in Mo${}_{1-x}$W${}_x$Te${}_2$