skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Renormalization of spectra by phase competition in the half-filled Hubbard-Holstein model

Authors:
; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1178594
Grant/Contract Number:
AC02-76SF00515; ER-046160
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 91; Journal Issue: 16; Related Information: CHORUS Timestamp: 2015-04-28 14:31:38; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Nowadnick, E. A., Johnston, S., Moritz, B., and Devereaux, T. P.. Renormalization of spectra by phase competition in the half-filled Hubbard-Holstein model. United States: N. p., 2015. Web. doi:10.1103/PhysRevB.91.165127.
Nowadnick, E. A., Johnston, S., Moritz, B., & Devereaux, T. P.. Renormalization of spectra by phase competition in the half-filled Hubbard-Holstein model. United States. doi:10.1103/PhysRevB.91.165127.
Nowadnick, E. A., Johnston, S., Moritz, B., and Devereaux, T. P.. Thu . "Renormalization of spectra by phase competition in the half-filled Hubbard-Holstein model". United States. doi:10.1103/PhysRevB.91.165127.
@article{osti_1178594,
title = {Renormalization of spectra by phase competition in the half-filled Hubbard-Holstein model},
author = {Nowadnick, E. A. and Johnston, S. and Moritz, B. and Devereaux, T. P.},
abstractNote = {},
doi = {10.1103/PhysRevB.91.165127},
journal = {Physical Review B},
number = 16,
volume = 91,
place = {United States},
year = {Thu Apr 23 00:00:00 EDT 2015},
month = {Thu Apr 23 00:00:00 EDT 2015}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevB.91.165127

Citation Metrics:
Cited by: 5works
Citation information provided by
Web of Science

Save / Share:
  • The two-dimensional extended Holstein-Hubbard model (EHH) has been considered at strong correlation regime in the non-half-filled band case to understand the self-trapping transition of electrons in strongly correlated electron system. We have used the method of optimized canonical transformations to transform an EHH model into an effective extended Hubbard (EEH) model. In the strong on-site correlation limit an EH model can be transformed into a t-J model which is finally solved using Hartree-Fock approximation (HFA). We found that, for non-half-filled band case, the transition is abrupt in the adiabatic region whereas it is continuous in the anti-adiabatic region.
  • We consider an extended Hubbard model of interacting fermions on a lattice. The fermion kinetic energy corresponds to a tight-binding Hamiltonian with nearest-neighbor ({minus}t) and next-nearest-neighbor (t{sup {prime}}) hopping matrix elements. In addition to the on-site Hubbard interaction (U) we also consider a nearest-neighbor repulsion (V). We obtain the zero-temperature phase diagram of our model within the Hartree-Fock approximation. We consider ground states having charge- and spin-density-wave ordering as well as states with orbital antiferromagnetism or spin nematic order. The latter two states correspond to particle-hole binding with d{sub x{sup 2}{minus}y{sup 2}} symmetry in the charge and spin channels, respectively.more » For t{sup {prime}}=0, only the charge-density-wave and spin-density-wave states are energetically stable. For nonzero t{sup {prime}}, we find that orbital antiferromagnetism (or spin nematic) order is stable over a finite portion of the phase diagram at weak coupling. This region of stability is seen to grow with increasing values of t{sup {prime}}. {copyright} {ital 1997} {ital The American Physical Society}« less
  • The antiferromagnetic Neel temperature T/sub N/ is calculated as a function of the Coulomb interaction U for a half-filled 3D Hubbard model. Numerical results are given for the specific heat and staggered magnetic suspectibility on periodic lattices ranging from 4/sup 3/--10/sup 3/ sites, and used to determine T/sub N/. The size dependence of the results suggests that the transition is weakly first order at small to intermediate values of U.
  • Cited by 4