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Title: Comment on “Chiral Phase Transition in Charge Ordered 1 T - TiSe 2

Abstract

A previous report of the emergence of chirality for the ( 2 × 2 × 2 ) charge density wave (CDW) in TiSe 2 has attracted much interest; the drastic symmetry breaking is highly unusual with few precedents. In that study, key evidence was provided by x-ray diffraction measurements of two superlattice reflections, (1.5 1.5 0.5) and (2.5 1 0). The (2.5 1 0) reflection appeared to show an anomalously large intensity and a transition onset at ~7 K below that of the (1.5 1.5 0.5) reflection. These observations, aided by modeling, were cited as evidence for a separate chiral transition. Here, we show that the prior conclusions based on x-ray diffraction are erroneous. There is just one transition, and it is achiral.

Authors:
 [1];  [1];  [2];  [3];  [1]
  1. Univ. of Illinois at Urbana-Champaign, IL (United States)
  2. Univ. of Illinois at Urbana-Champaign, IL (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  3. Univ. of Illinois at Urbana-Champaign, IL (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS); Academia Sinica, Taipei (Taiwan)
Publication Date:
Research Org.:
Univ. of Illinois at Urbana-Champaign, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
OSTI Identifier:
1598481
Alternate Identifier(s):
OSTI ID: 1546398
Grant/Contract Number:  
FG02-07ER46383
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 122; Journal Issue: 22; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Charge density waves; TiSe2; chiral order

Citation Formats

Lin, Meng-Kai, Hlevyack, Joseph A., Chen, Peng, Liu, Ro-Ya, and Chiang, Tai-Chang. Comment on “Chiral Phase Transition in Charge Ordered 1T - TiSe2 ”. United States: N. p., 2019. Web. doi:10.1103/PhysRevLett.122.229701.
Lin, Meng-Kai, Hlevyack, Joseph A., Chen, Peng, Liu, Ro-Ya, & Chiang, Tai-Chang. Comment on “Chiral Phase Transition in Charge Ordered 1T - TiSe2 ”. United States. doi:10.1103/PhysRevLett.122.229701.
Lin, Meng-Kai, Hlevyack, Joseph A., Chen, Peng, Liu, Ro-Ya, and Chiang, Tai-Chang. Thu . "Comment on “Chiral Phase Transition in Charge Ordered 1T - TiSe2 ”". United States. doi:10.1103/PhysRevLett.122.229701. https://www.osti.gov/servlets/purl/1598481.
@article{osti_1598481,
title = {Comment on “Chiral Phase Transition in Charge Ordered 1T - TiSe2 ”},
author = {Lin, Meng-Kai and Hlevyack, Joseph A. and Chen, Peng and Liu, Ro-Ya and Chiang, Tai-Chang},
abstractNote = {A previous report of the emergence of chirality for the ( 2 × 2 × 2 ) charge density wave (CDW) in TiSe2 has attracted much interest; the drastic symmetry breaking is highly unusual with few precedents. In that study, key evidence was provided by x-ray diffraction measurements of two superlattice reflections, (1.5 1.5 0.5) and (2.5 1 0). The (2.5 1 0) reflection appeared to show an anomalously large intensity and a transition onset at ~7 K below that of the (1.5 1.5 0.5) reflection. These observations, aided by modeling, were cited as evidence for a separate chiral transition. Here, we show that the prior conclusions based on x-ray diffraction are erroneous. There is just one transition, and it is achiral.},
doi = {10.1103/PhysRevLett.122.229701},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 22,
volume = 122,
place = {United States},
year = {2019},
month = {6}
}

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Works referenced in this record:

Chiral Phase Transition in Charge Ordered 1 T TiSe 2
journal, May 2013


X-ray study of the charge-density-wave transition in single-layer TiS e 2
journal, May 2017


Electronic and vibrational properties of TiSe 2 in the charge-density-wave phase from first principles
journal, September 2015


Electronic properties and superlattice formation in the semimetal TiSe 2
journal, November 1976


Chiral Charge-Density Waves
journal, October 2010


Local Real-Space View of the Achiral 1 T TiSe 2 2 × 2 × 2 Charge Density Wave
journal, March 2018