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Title: Topological doping and the stability of stripe phases

Abstract

We analyze the properties of a general Ginzburg-Landau free energy with competing order parameters, long-range interactions, and global constraints (e.g., a fixed value of a total {open_quotes}charge{close_quotes}) to address the physics of stripe phases in underdoped high-T{sub c} and related materials. For a local free energy limited to quadratic terms of the gradient expansion, only uniform or phase-separated configurations are thermodynamically stable. {open_quotes}Stripe{close_quotes} or other nonuniform phases can be stabilized by long-range forces, but can only have nontopological (in-phase) domain walls where the components of the antiferromagnetic order parameter never change sign, and the periods of charge and spin-density waves coincide. The {ital antiphase} domain walls observed experimentally require physics on an intermediate length scale, and they are absent from a model that involves only long-distance physics. Dense stripe phases can be stable even in the absence of long-range forces, but domain walls always attract at large distances; i.e., there is a ubiquitous tendency to phase separation at small doping. The implications for the phase diagram of underdoped cuprates are discussed. {copyright} {ital 1999} {ital The American Physical Society}

Authors:
 [1];  [2];  [3];  [4];  [5]
  1. Institute for Advanced Study, Princeton, New Jersey 08540 (United States)
  2. Department of Physics Astronomy, University of California, Los Angeles, California 90095 (United States)
  3. Department of Physics, Brookhaven National Laboratory, Upton, New York 11973-5000 (United States)
  4. Department of Physics, Stanford University, Stanford, Calfornia 94305 (United States)
  5. Institute for Theoretical Physics, University of California, Santa Barbara, Calfornia 93106-4030 (United States)
Publication Date:
OSTI Identifier:
686451
Resource Type:
Journal Article
Journal Name:
Physical Review, B: Condensed Matter
Additional Journal Information:
Journal Volume: 60; Journal Issue: 10; Other Information: PBD: Sep 1999
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; HIGH-TC SUPERCONDUCTORS; STABILITY; DOMAIN STRUCTURE; FREE ENERGY; GINZBURG-LANDAU THEORY; ORDER PARAMETERS; ORDER-DISORDER TRANSFORMATIONS; PHASE DIAGRAMS; ANTIFERROMAGNETISM; SPIN WAVES

Citation Formats

Pryadko, L.P., Kivelson, S.A., Emery, V.J., Bazaliy, Y.B., and Demler, E.A. Topological doping and the stability of stripe phases. United States: N. p., 1999. Web. doi:10.1103/PhysRevB.60.7541.
Pryadko, L.P., Kivelson, S.A., Emery, V.J., Bazaliy, Y.B., & Demler, E.A. Topological doping and the stability of stripe phases. United States. doi:10.1103/PhysRevB.60.7541.
Pryadko, L.P., Kivelson, S.A., Emery, V.J., Bazaliy, Y.B., and Demler, E.A. Wed . "Topological doping and the stability of stripe phases". United States. doi:10.1103/PhysRevB.60.7541.
@article{osti_686451,
title = {Topological doping and the stability of stripe phases},
author = {Pryadko, L.P. and Kivelson, S.A. and Emery, V.J. and Bazaliy, Y.B. and Demler, E.A.},
abstractNote = {We analyze the properties of a general Ginzburg-Landau free energy with competing order parameters, long-range interactions, and global constraints (e.g., a fixed value of a total {open_quotes}charge{close_quotes}) to address the physics of stripe phases in underdoped high-T{sub c} and related materials. For a local free energy limited to quadratic terms of the gradient expansion, only uniform or phase-separated configurations are thermodynamically stable. {open_quotes}Stripe{close_quotes} or other nonuniform phases can be stabilized by long-range forces, but can only have nontopological (in-phase) domain walls where the components of the antiferromagnetic order parameter never change sign, and the periods of charge and spin-density waves coincide. The {ital antiphase} domain walls observed experimentally require physics on an intermediate length scale, and they are absent from a model that involves only long-distance physics. Dense stripe phases can be stable even in the absence of long-range forces, but domain walls always attract at large distances; i.e., there is a ubiquitous tendency to phase separation at small doping. The implications for the phase diagram of underdoped cuprates are discussed. {copyright} {ital 1999} {ital The American Physical Society}},
doi = {10.1103/PhysRevB.60.7541},
journal = {Physical Review, B: Condensed Matter},
number = 10,
volume = 60,
place = {United States},
year = {1999},
month = {9}
}