Persistent Charge-Density-Wave Order in Single-Layer TaSe2
SCIE
SCOPUS
- Title
- Persistent Charge-Density-Wave Order in Single-Layer TaSe2
- Authors
- 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; Hwang, Choongyu; Crommie, Michael F.; Mo, Sung-Kwan
- Date Issued
- 2018-02
- Publisher
- AMER CHEMICAL SOC
- Abstract
- We present the electronic characterization of single-layer 1H-TaSe2 grown by molecular beam epitaxy using a combined angle-resolved photoemission spectroscopy, scanning tunneling microscopy/spectroscopy, and density functional theory calculations. We demonstrate that 3 × 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 CDW order in the two-dimensional limit.
- Keywords
- Charge density; Density functional theory; Electronic structure; Electrons; Molecular beam epitaxy; Photoelectron spectroscopy; Scanning tunneling microscopy; Selenium compounds; Tantalum compounds; Transition metals; Angle resolved photoemission spectroscopy; ARPES; Electronic characterization; Fermi surface topology; Scanning tunneling microscopy/spectroscopy; Spin-orbit couplings; TaSe2; Transition metal dichalcogenides; Charge density waves
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/40993
- DOI
- 10.1021/acs.nanolett.7b03264
- ISSN
- 1530-6984
- Article Type
- Article
- Citation
- NANO LETTERS, vol. 18, no. 2, page. 689 - 694, 2018-02
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