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Title: X-ray study of the charge-density-wave transition in single-layer TiS e 2

Abstract

Synchrotron x-ray studies of single-layer TiSe2 reveal displacements of the Ti and Se atoms as a function of temperature. The measurements, with a high sensitivity of 0.001 Å, show a (2x2) charge density wave (CDW) structure at temperatures below a critical temperature of TC1 = 233 K. The temperature dependence follows a BCS-like second-order mean-field behavior. A fivelayer TiSe2 film also exhibits a CDW transition of the same character but at a lower transition temperature of TC5 = 204 K, which is the same as that for bulk TiSe2. The results demonstrate that lattice distortion is an integral part of the CDW transition that must also involve renormalization of the electronic structure.

Authors:
; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE Office of Science - Office of Basic Energy Sciences - Materials Sciences and Engineering Division
OSTI Identifier:
1377888
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 95; Journal Issue: 20; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; monolayer film; transition metal dichalcogenide

Citation Formats

Fang, Xin-Yue, Hong, Hawoong, Chen, Peng, and Chiang, T. -C. X-ray study of the charge-density-wave transition in single-layer TiSe2. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.95.201409.
Fang, Xin-Yue, Hong, Hawoong, Chen, Peng, & Chiang, T. -C. X-ray study of the charge-density-wave transition in single-layer TiSe2. United States. doi:10.1103/PhysRevB.95.201409.
Fang, Xin-Yue, Hong, Hawoong, Chen, Peng, and Chiang, T. -C. Mon . "X-ray study of the charge-density-wave transition in single-layer TiSe2". United States. doi:10.1103/PhysRevB.95.201409.
@article{osti_1377888,
title = {X-ray study of the charge-density-wave transition in single-layer TiSe2},
author = {Fang, Xin-Yue and Hong, Hawoong and Chen, Peng and Chiang, T. -C.},
abstractNote = {Synchrotron x-ray studies of single-layer TiSe2 reveal displacements of the Ti and Se atoms as a function of temperature. The measurements, with a high sensitivity of 0.001 Å, show a (2x2) charge density wave (CDW) structure at temperatures below a critical temperature of TC1 = 233 K. The temperature dependence follows a BCS-like second-order mean-field behavior. A fivelayer TiSe2 film also exhibits a CDW transition of the same character but at a lower transition temperature of TC5 = 204 K, which is the same as that for bulk TiSe2. The results demonstrate that lattice distortion is an integral part of the CDW transition that must also involve renormalization of the electronic structure.},
doi = {10.1103/PhysRevB.95.201409},
journal = {Physical Review B},
issn = {2469-9950},
number = 20,
volume = 95,
place = {United States},
year = {2017},
month = {5}
}

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