论文标题
Mo $ $ _ {1-X} $ W $ _ {X} $ TE $ _ {2} $的结构过渡的演变
Evolution of the structural transition in Mo$_{1-x}$W$_{x}$Te$_{2}$
论文作者
论文摘要
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 $x \approx 0.54$.首先在Mote $ _ {2} $中观察到，从T $ _ {d} $到1T $^{\ PRIME} $的过渡伴随着中间的伪 - 正常阶段，T $ _ {d}^{**} $。掺杂W时，t $ _ {d}^{*} $ aphenes消失在$ x \大约0.34 $中。在此浓度之上，相反，可以观察到具有T $ _ {D} $和1T $^{\ prime} $的相位共存行为。与1T $^{\ prime} $ $β$角有关的平面内定位参数$δ$随温度和W替代而降低，这可能是由于层间相互作用中的强烈无性带来的。相比之下，相比，相比之下，相位共存的温度宽度几乎保持恒定，而压力下报告的宽度。
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$_{d}^{*}$. Upon doping with W, the T$_{d}^{*}$ 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 $δ$, which relates to the 1T$^{\prime}$ $β$ 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.
