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Title: Influence of Ti doping on the incommensurate charge density wave in 1T–TaS2

Abstract

Here, we report temperature-dependent transport and x-ray diffraction measurements of the influence of Ti hole doping on the charge density wave (CDW) in 1T–Ta1–xTixS2. Confirming past studies, we find that even trace impurities eliminate the low-temperature commensurate (C) phase in this system. Surprisingly, the magnitude of the in-plane component of the CDW wave vector in the nearly commensurate (NC) phase does not change significantly with Ti concentration, as might be expected from a changing Fermi surface volume. Instead, the angle of the CDW in the basal plane rotates, from 11.9° at x=0 to 16.4° at x=0.12. Ti substitution also leads to an extended region of coexistence between incommensurate (IC) and NC phases, indicating heterogeneous nucleation near the transition. Finally, we explain a resistive anomaly originally observed by Di Salvo [F. J. Di Salvo et al., Phys. Rev. B 12, 2220 (1975)] as arising from pinning of the CDW on the crystal lattice. Our study highlights the importance of commensuration effects in the NC phase, particularly at x ~ 0.08.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [2];  [3];  [1];  [1];  [1];  [1];  [1]
  1. Univ. of Illinois, Urbana, IL (United States)
  2. Cornell Univ., Ithaca, NY (United States)
  3. Leibniz Inst. for Solid State and Materials Research, Dresden (Germany)
Publication Date:
Research Org.:
Univ. of Illinois at Urbana-Champaign, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1958838
Alternate Identifier(s):
OSTI ID: 1184705
Grant/Contract Number:  
FG02-06ER46285; SC0012368
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 91; Journal Issue: 24; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Chen, X. M., Miller, A. J., Nugroho, C., de la Peña, G. A., Joe, Y. I., Kogar, A., Brock, J. D., Geck, J., MacDougall, G. J., Cooper, S. L., Fradkin, E., Van Harlingen, D. J., and Abbamonte, P. Influence of Ti doping on the incommensurate charge density wave in 1T–TaS2. United States: N. p., 2015. Web. doi:10.1103/physrevb.91.245113.
Chen, X. M., Miller, A. J., Nugroho, C., de la Peña, G. A., Joe, Y. I., Kogar, A., Brock, J. D., Geck, J., MacDougall, G. J., Cooper, S. L., Fradkin, E., Van Harlingen, D. J., & Abbamonte, P. Influence of Ti doping on the incommensurate charge density wave in 1T–TaS2. United States. https://doi.org/10.1103/physrevb.91.245113
Chen, X. M., Miller, A. J., Nugroho, C., de la Peña, G. A., Joe, Y. I., Kogar, A., Brock, J. D., Geck, J., MacDougall, G. J., Cooper, S. L., Fradkin, E., Van Harlingen, D. J., and Abbamonte, P. Mon . "Influence of Ti doping on the incommensurate charge density wave in 1T–TaS2". United States. https://doi.org/10.1103/physrevb.91.245113. https://www.osti.gov/servlets/purl/1958838.
@article{osti_1958838,
title = {Influence of Ti doping on the incommensurate charge density wave in 1T–TaS2},
author = {Chen, X. M. and Miller, A. J. and Nugroho, C. and de la Peña, G. A. and Joe, Y. I. and Kogar, A. and Brock, J. D. and Geck, J. and MacDougall, G. J. and Cooper, S. L. and Fradkin, E. and Van Harlingen, D. J. and Abbamonte, P.},
abstractNote = {Here, we report temperature-dependent transport and x-ray diffraction measurements of the influence of Ti hole doping on the charge density wave (CDW) in 1T–Ta1–xTixS2. Confirming past studies, we find that even trace impurities eliminate the low-temperature commensurate (C) phase in this system. Surprisingly, the magnitude of the in-plane component of the CDW wave vector in the nearly commensurate (NC) phase does not change significantly with Ti concentration, as might be expected from a changing Fermi surface volume. Instead, the angle of the CDW in the basal plane rotates, from 11.9° at x=0 to 16.4° at x=0.12. Ti substitution also leads to an extended region of coexistence between incommensurate (IC) and NC phases, indicating heterogeneous nucleation near the transition. Finally, we explain a resistive anomaly originally observed by Di Salvo [F. J. Di Salvo et al., Phys. Rev. B 12, 2220 (1975)] as arising from pinning of the CDW on the crystal lattice. Our study highlights the importance of commensuration effects in the NC phase, particularly at x ~ 0.08.},
doi = {10.1103/physrevb.91.245113},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 24,
volume = 91,
place = {United States},
year = {Mon Jun 08 00:00:00 EDT 2015},
month = {Mon Jun 08 00:00:00 EDT 2015}
}

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Works referenced in this record:

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