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Title: NOISE AND HYSTERESIS IN CHARGED STRIPE, CHECKERBOARD, AND CLUMP FORMING SYSTEMS

Abstract

We numerically examine noise fluctuations and hysteresis phenomena in charged systems that form stripe, labyrinth or clump patterns. It is believed that charge inhomogeneities of this type arise in two-dimensional (2D) quantum hall systems and in electron crystal structures in high temperature superconductors, while related patterns appear in manganites and type-I superconductors. Recent noise and transport experiments in twodimensional electron gases and high temperature superconducting samples revealed both 1/ f α. noise signatures and hysteretic phenomena. Using numerical simulations we show that 1/ f α. noise fluctuations and hysteresis are generic features that occur in charge systems which undergo a type of phase separation that results in stripes, clumps, checkerboards, or other inhomogeneous patterns. We find that these systems exhibit 1/ f α. fluctuations with 1.2 < α < 1.8, rather than simple 1/ f or 1/ f 2 fluctuations. We also propose that the 2D metal insulator transition may be associated with a clump electron glass phase rather than a Wigner glass phase.

Authors:
 [1];  [1];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1337077
Report Number(s):
LA-UR-07-3083
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Noise; fluctuations; charge ordering

Citation Formats

Reichhardt, Charles, Reichhardt, Cynthia J., and Bishop, Alan R.. NOISE AND HYSTERESIS IN CHARGED STRIPE, CHECKERBOARD, AND CLUMP FORMING SYSTEMS. United States: N. p., 2007. Web. doi:10.2172/1337077.
Reichhardt, Charles, Reichhardt, Cynthia J., & Bishop, Alan R.. NOISE AND HYSTERESIS IN CHARGED STRIPE, CHECKERBOARD, AND CLUMP FORMING SYSTEMS. United States. doi:10.2172/1337077.
Reichhardt, Charles, Reichhardt, Cynthia J., and Bishop, Alan R.. Mon . "NOISE AND HYSTERESIS IN CHARGED STRIPE, CHECKERBOARD, AND CLUMP FORMING SYSTEMS". United States. doi:10.2172/1337077. https://www.osti.gov/servlets/purl/1337077.
@article{osti_1337077,
title = {NOISE AND HYSTERESIS IN CHARGED STRIPE, CHECKERBOARD, AND CLUMP FORMING SYSTEMS},
author = {Reichhardt, Charles and Reichhardt, Cynthia J. and Bishop, Alan R.},
abstractNote = {We numerically examine noise fluctuations and hysteresis phenomena in charged systems that form stripe, labyrinth or clump patterns. It is believed that charge inhomogeneities of this type arise in two-dimensional (2D) quantum hall systems and in electron crystal structures in high temperature superconductors, while related patterns appear in manganites and type-I superconductors. Recent noise and transport experiments in twodimensional electron gases and high temperature superconducting samples revealed both 1/ fα. noise signatures and hysteretic phenomena. Using numerical simulations we show that 1/ fα. noise fluctuations and hysteresis are generic features that occur in charge systems which undergo a type of phase separation that results in stripes, clumps, checkerboards, or other inhomogeneous patterns. We find that these systems exhibit 1/ fα. fluctuations with 1.2 < α < 1.8, rather than simple 1/ f or 1/ f 2 fluctuations. We also propose that the 2D metal insulator transition may be associated with a clump electron glass phase rather than a Wigner glass phase.},
doi = {10.2172/1337077},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon May 07 00:00:00 EDT 2007},
month = {Mon May 07 00:00:00 EDT 2007}
}

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