http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Persistent Charge-Density-Wave Order in Single-Layer TaSe<sub>2</sub>
Ryu, Hyejin,Chen, Yi,Kim, Heejung,Tsai, Hsin-Zon,Tang, Shujie,Jiang, Juan,Liou, Franklin,Kahn, Salman,Jia, Caihong,Omrani, Arash A.,Shim, Ji Hoon,Hussain, Zahid,Shen, Zhi-Xun,Kim, Kyoo,Min, Byung Il,H American Chemical Society 2018 NANO LETTERS Vol.18 No.2
<P>We present the electronic characterization of single-layer 1H-TaSe2 grown by molecular beam epitaxy using a combined angle-resolved photoeinission spectroscopy, scanning tunneling microscopy/spectroscopy, and density functional theory calculations. We demonstrate that 3 x 3 charge-density-wave (CDW) order persists despite distinct changes in the low energy electronic. structure highlighted by the reduction in the number of-bands crossing the Fermi energy and the corresponding modification Of Fermi surface topology. Enhanced, spin-orbit coupling and lattice distortion in the single-layer play a crucial role in the formation of CDW order. Our findings provide a deeper understanding of the nature of COW order in the two-dimensional limit.</P>
Quantum spin Hall state in monolayer 1T'-WTe<sub>2</sub>
Tang, Shujie,Zhang, Chaofan,Wong, Dillon,Pedramrazi, Zahra,Tsai, Hsin-Zon,Jia, Chunjing,Moritz, Brian,Claassen, Martin,Ryu, Hyejin,Kahn, Salman,Jiang, Juan,Yan, Hao,Hashimoto, Makoto,Lu, Donghui,Moore NATURE PUBLISHING GROUP 2017 NATURE PHYSICS Vol.13 No.7
<P>A quantum spin Hall (QSH) insulator is a novel two-dimensional quantum state of matter that features quantized Hall conductance in the absence of a magnetic field, resulting from topologically protected dissipationless edge states that bridge the energy gap opened by band inversion and strong spin-orbit coupling(1,2). By investigating the electronic structure of epitaxially grown monolayer 1T'-WTe2 using angle-resolved photoemission (ARPES) and first-principles calculations, we observe clear signatures of topological band inversion and bandgap opening, which are the hallmarks of a QSH state. Scanning tunnelling microscopy measurements further confirm the correct crystal structure and the existence of a bulk bandgap, and provide evidence for a modified electronic structure near the edge that is consistent with the expectations for a QSH insulator. Our results establish monolayer 1T'-WTe2 as a new class of QSH insulator with large bandgap in a robust two-dimensional materials family of transition metal dichalcogenides (TMDCs).</P>
Charge density wave order in 2D transition metal dichalcogenides
Hyejin Ryu,Yi Chen,Miguel M. Ugeda,Heejung Kim,Yi Zhang,Hsin-Zon Tsai,Shujie Tang,Juan Jiang,Franklin Liou,Salman Kahn,Caihong Jia,Arash A. Omrani,Ji Hoon Shim,Zahid Hussain,Zhi-Xun Shen,Kyoo Kim,Byun 한국진공학회 2018 한국진공학회 학술발표회초록집 Vol.2018 No.2