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Title: Evidence for a Nematic Phase in La 1.75 Sr 0.25 NiO 4

Abstract

Determining the nature of electronic states in doped Mott insulators remains a challenging task. In the case of tetragonal La 2 - xSr xNiO 4, the occurrence of diagonal charge and spin stripe order in the ground state is now well established. In contrast, the nature of the high-temperature “disordered” state from which the stripe order develops has long been a subject of controversy, with considerable speculation regarding a polaronic liquid. Following the recent detection of dynamic charge stripes, in this paper we use neutron scattering measurements on an x = 0.25 crystal to demonstrate that the dispersion of the charge-stripe excitations is anisotropic. Finally, this observation provides compelling evidence for the presence of electronic nematic order.

Authors:
 [1];  [2];  [1];  [3];  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division
  3. Univ. of Colorado, Boulder, CO (United States). Dept. of Physics
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Colorado, Boulder, CO (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1354681
Report Number(s):
BNL-113901-2017-JA
Journal ID: ISSN 0031-9007; KC0402010; ERKCSNX; TRN: US1702727
Grant/Contract Number:
SC0012704; SC0006939
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 118; Journal Issue: 17; 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; correlated systems

Citation Formats

Zhong, Ruidan, Winn, Barry L., Gu, Genda, Reznik, Dmitry, and Tranquada, J. M. Evidence for a Nematic Phase in La1.75Sr0.25NiO4. United States: N. p., 2017. Web. doi:10.1103/PhysRevLett.118.177601.
Zhong, Ruidan, Winn, Barry L., Gu, Genda, Reznik, Dmitry, & Tranquada, J. M. Evidence for a Nematic Phase in La1.75Sr0.25NiO4. United States. doi:10.1103/PhysRevLett.118.177601.
Zhong, Ruidan, Winn, Barry L., Gu, Genda, Reznik, Dmitry, and Tranquada, J. M. 2017. "Evidence for a Nematic Phase in La1.75Sr0.25NiO4". United States. doi:10.1103/PhysRevLett.118.177601.
@article{osti_1354681,
title = {Evidence for a Nematic Phase in La1.75Sr0.25NiO4},
author = {Zhong, Ruidan and Winn, Barry L. and Gu, Genda and Reznik, Dmitry and Tranquada, J. M.},
abstractNote = {Determining the nature of electronic states in doped Mott insulators remains a challenging task. In the case of tetragonal La2 - xSrxNiO4, the occurrence of diagonal charge and spin stripe order in the ground state is now well established. In contrast, the nature of the high-temperature “disordered” state from which the stripe order develops has long been a subject of controversy, with considerable speculation regarding a polaronic liquid. Following the recent detection of dynamic charge stripes, in this paper we use neutron scattering measurements on an x = 0.25 crystal to demonstrate that the dispersion of the charge-stripe excitations is anisotropic. Finally, this observation provides compelling evidence for the presence of electronic nematic order.},
doi = {10.1103/PhysRevLett.118.177601},
journal = {Physical Review Letters},
number = 17,
volume = 118,
place = {United States},
year = 2017,
month = 4
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on April 28, 2018
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