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Title: Spiral magnetism and collective excitations in doped Hubbard models

Abstract

We discuss the ground state properties and the collective dynamics of spiral magnetic states in the two dimensional Hubbard model. In particular we present the phase diagram in the presence of a finite next-nearest-neighbor hopping integral t{prime}. In contrast to the plain t Hubbard-model we find a region of stable antiferromagnetism in an extended interval of electron (hole) doping off half filling for a negative (positive) ratio of t{prime}/t. In addition we investigate the coupled charge and spiral spin-excitations off half filling. The resulting collective modes are found to be highly anisotropic and strongly Landau damped.

Authors:
 [1]
  1. Universitaet zu Koeln (Germany)
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
107584
Report Number(s):
CONF-9409365-
Journal ID: JLTPAC; ISSN 0022-2291; TRN: 95:021295
Resource Type:
Journal Article
Journal Name:
Journal of Low Temperature Physics
Additional Journal Information:
Journal Volume: 99; Journal Issue: 3-4; Conference: International Euroconference on magnetic correlations, metal-insulator-transitions, and superconductivity in novel materials, Wuerzburg (Germany), 26-30 Sep 1994; Other Information: PBD: May 1995
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; 36 MATERIALS SCIENCE; HUBBARD MODEL; GROUND STATES; MAGNETIC PROPERTIES; COPPER OXIDES; CORRELATIONS; LANDAU DAMPING; TWO-DIMENSIONAL CALCULATIONS; DOPED MATERIALS; HOLES; HIGH-TC SUPERCONDUCTORS

Citation Formats

Brenig, W. Spiral magnetism and collective excitations in doped Hubbard models. United States: N. p., 1995. Web. doi:10.1007/BF00752301.
Brenig, W. Spiral magnetism and collective excitations in doped Hubbard models. United States. https://doi.org/10.1007/BF00752301
Brenig, W. Mon . "Spiral magnetism and collective excitations in doped Hubbard models". United States. https://doi.org/10.1007/BF00752301.
@article{osti_107584,
title = {Spiral magnetism and collective excitations in doped Hubbard models},
author = {Brenig, W},
abstractNote = {We discuss the ground state properties and the collective dynamics of spiral magnetic states in the two dimensional Hubbard model. In particular we present the phase diagram in the presence of a finite next-nearest-neighbor hopping integral t{prime}. In contrast to the plain t Hubbard-model we find a region of stable antiferromagnetism in an extended interval of electron (hole) doping off half filling for a negative (positive) ratio of t{prime}/t. In addition we investigate the coupled charge and spiral spin-excitations off half filling. The resulting collective modes are found to be highly anisotropic and strongly Landau damped.},
doi = {10.1007/BF00752301},
url = {https://www.osti.gov/biblio/107584}, journal = {Journal of Low Temperature Physics},
number = 3-4,
volume = 99,
place = {United States},
year = {1995},
month = {5}
}