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Title: Interplay of charge density wave states and strain at the surface of CeTe2

Abstract

in this work we use scanning tunneling microscopy (STM) to study charge density wave (CDW) states in the rare-earth ditelluride, CeTe 2 . Our STM measurements surprisingly detect a unidirectional CDW with q ~ 0.28 a * , which differs from previous experimental and first-principles studies of the rare-earth ditellurides, and which is very close to what is found in experimental measurements of the related rare-earth tritellurides. Furthermore, in the vicinity of an extended subsurface defect, we find spatially-separated as well as spatially-coexisting unidirectional CDWs at the surface of CeTe 2 . We quantify the nanoscale strain and its variations induced by this defect, and establish a correlation between local lattice strain and the locally-established CDW states; this suggests that lattice strain plays an important role in determining the specific characteristics of the established CDW state. Our measurements probe the fundamental properties of a weakly-bound two-dimensional Te sheet, which experimental and theoretical work has previously established as the fundamental component driving much of the essential physics in both the rare-earth di- and tritelluride compounds.

Authors:
 [1];  [1]; ORCiD logo [1]; ORCiD logo [1];  [2];  [2]; ORCiD logo [1]
  1. Clark Univ., Worcester, MA (United States)
  2. Stanford Univ., CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1637651
Grant/Contract Number:  
AC02-76SF00515; DMR-1904918
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 101; Journal Issue: 24; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE

Citation Formats

Sharma, Bishnu, Singh, Manoj, Ahmed, Burhan, Yu, Boning, Walmsley, Philip, Fisher, Ian R., and Boyer, Michael C. Interplay of charge density wave states and strain at the surface of CeTe2. United States: N. p., 2020. Web. https://doi.org/10.1103/physrevb.101.245423.
Sharma, Bishnu, Singh, Manoj, Ahmed, Burhan, Yu, Boning, Walmsley, Philip, Fisher, Ian R., & Boyer, Michael C. Interplay of charge density wave states and strain at the surface of CeTe2. United States. https://doi.org/10.1103/physrevb.101.245423
Sharma, Bishnu, Singh, Manoj, Ahmed, Burhan, Yu, Boning, Walmsley, Philip, Fisher, Ian R., and Boyer, Michael C. Wed . "Interplay of charge density wave states and strain at the surface of CeTe2". United States. https://doi.org/10.1103/physrevb.101.245423.
@article{osti_1637651,
title = {Interplay of charge density wave states and strain at the surface of CeTe2},
author = {Sharma, Bishnu and Singh, Manoj and Ahmed, Burhan and Yu, Boning and Walmsley, Philip and Fisher, Ian R. and Boyer, Michael C.},
abstractNote = {in this work we use scanning tunneling microscopy (STM) to study charge density wave (CDW) states in the rare-earth ditelluride, CeTe2. Our STM measurements surprisingly detect a unidirectional CDW with q~0.28a*, which differs from previous experimental and first-principles studies of the rare-earth ditellurides, and which is very close to what is found in experimental measurements of the related rare-earth tritellurides. Furthermore, in the vicinity of an extended subsurface defect, we find spatially-separated as well as spatially-coexisting unidirectional CDWs at the surface of CeTe2. We quantify the nanoscale strain and its variations induced by this defect, and establish a correlation between local lattice strain and the locally-established CDW states; this suggests that lattice strain plays an important role in determining the specific characteristics of the established CDW state. Our measurements probe the fundamental properties of a weakly-bound two-dimensional Te sheet, which experimental and theoretical work has previously established as the fundamental component driving much of the essential physics in both the rare-earth di- and tritelluride compounds.},
doi = {10.1103/physrevb.101.245423},
journal = {Physical Review B},
number = 24,
volume = 101,
place = {United States},
year = {2020},
month = {6}
}

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