Title: Competition between phase separation and spin density wave or charge density wave order: Role of long-range interactions

Journal Article · · Physical Review B
 [1];  [2];  [3];  [4]
  1. Univ. of California, Davis, CA (United States); Physics Department, University of California, Davis
  2. Université Côte d'Azur, Nice (France). Centre National de la Recherche Scientifique, INPHYNI
  3. Université Côte d'Azur, Nice (France). Centre National de la Recherche Scientifique, INPHYNI; MajuLab (Singapore). Centre National de la Recherche Scientifique–UCA-SU-NUS-NTU International Joint Research Unit; National Univ. of Singapore (Singapore); Beijing Computational Science Research Center (China)
  4. Univ. of California, Davis, CA (United States)
+ Show Author Affiliations

We report that recent studies of pairing and charge order in materials such as FeSe, SrTiO3, and 2H-NbSe2 have suggested that momentum dependence of the electron-phonon coupling plays an important role in their properties. Initial attempts to study Hamiltonians which either do not include or else truncate the range of Coulomb repulsion have noted that the resulting spatial nonlocality of the electron-phonon interaction leads to a dominant tendency to phase separation. Here we present quantum Monte Carlo results for such models in which we incorporate both on-site and intersite electron-electron interactions. We show that these can stabilize phases in which the density is homogeneous and determine the associated phase boundaries. As a consequence, the physics of momentum dependent electron-phonon coupling can be determined outside of the trivial phase separated regime.

Research Organization:
Univ. of California, Davis, CA (United States)
Sponsoring Organization:
National Research Agency; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
Grant/Contract Number:
SC0014671
OSTI ID:
1597046
Journal Information:
Physical Review B, Journal Name: Physical Review B Journal Issue: 20 Vol. 99; ISSN 2469-9950; ISSN PRBMDO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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  • Yamazaki, Satoshi; Hoshino, Shintaro; Kuramoto, Yoshio
  • Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2013) https://doi.org/10.7566/JPSCP.3.016021
conference June 2014

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