2015年6月12日 · Bulk WTe 2 in the Td structure (d) has a 0.21 eV band overlap in Γ-X and the density of states (e) reaches a minimum, but never goes to zero near Fermi level. The crystal structure plays a...

2017年6月26日 · In this work, we report a successful growth of monolayer 1T′-WTe 2 using molecular beam epitaxy (MBE) on a bilayer graphene (BLG) substrate. In-situ ARPES measurements clearly show the band...

本文总结了单层1 T' -WTe 2 在实验上的最新进展, 包括基于分子束外延生长的材料制备, 螺旋边界态的探测及其对磁场的响应, 掺杂、应力等手段在单层1 T' -WTe 2 中诱导出的新奇量子物态等. 也对单层1 T' -WTe 2 未来可能的应用前景进行了展望. Quantum spin Hall effect, usually existing in two-dimensional (2D) topological insulators, has topologically protected helical edge states.

In this contribution, we study the band structure of WTe2 using angle-resolved photoemission spectroscopy and first-principles calculations to demonstrate that the temperature-dependent band structure has no substantial effect on the temperature-dependent XMR, as our measurements do not show band structure changes upon increasing the sample temp...

2000年10月15日 · We have studied the electronic structure of the layered compound $\mathrm {Td}\ensuremath {-} {\mathrm {WTe}}_ {2}$ experimentally using high-resolution angle-resolved photoelectron spectroscopy, and theoretically using density-functional based augmented spherical wave calculations.

2020年12月1日 · Dielectric constants, optical absorption, and photoconductivity spectra reaffirm the metallic character (absence of band gap) of WTe 2 and MoTe 2, as found from the electronic band structure calculations. The loss peak appears at around the same energy (~16 eV) for both the compounds of interest.

2020年5月9日 · In this post, we calculate the band structure for monolayer 1T and 1T’ WTe2. We saw that SOC will open a gap when bands touching each other. However, to further determine if there are topological properties such as band inversion, the further calculation to track how the band evolves from 1T to 1T’ is needed.

Using ab initio calculations, we present a two-dimensional (2D) α-2D-germanene dioxide material with an ideal sp ³ bonding network which possesses a large band gap up to 2.50 eV. The phonon...

2021年2月15日 · We next analyzed the electronic band structures of intrinsic and doped WT e 2. We show that doping with other chalcogens in the same group of elements as Te reduces the energy band gap but leaves the overall band structure relatively unchanged.

2017年4月10日 · Here we present evidence that at low temperatures monolayer WTe 2 exhibits an insulating bulk state and edge conduction, and describe the properties of the edge conduction, including its...