Electronic phase separation in complex materials

Sang-Wook Cheong, P. A. Sharma, N. Hur, Y. Horibe, C. H. Chen

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

It has been common practice for physicists to assume electronic homogeneity when dealing with condensed matter properties. Recent experimental development, which have revealed fascinating properties of complex materials, demonstrate that such extraordinary macroscopic properties are often associated with microscopic-scale electronic/magnetic inhomogeneity, which limits the Hamitonian-type theoretical approach. Herein, we discuss the microscopic coexistence of metallic and insulating phases in novel materials having an intricate interplay among charge/spin/lattice degrees of freedom. Examples include the coexistence of superconducting-metallic and insulating phases in La2CuO4+δ as well as Mg1-xB2. The insulating nature in La2CuO4+δ originates from electron-electron correlation, but disorder plays a dominant role in producing the insulating behavior in Mg-deficient Mg1-xB2. We also examine the microscopic coexistence of ferromagnetic-metallic and charge-ordered-insulating phases in mixed-valent manganites, exhibiting colossal magnetoresistance. Possible origins of this electronic phase separation are discussed.

Original languageEnglish (US)
Pages (from-to)39-51
Number of pages13
JournalPhysica B: Condensed Matter
Volume318
Issue number1
DOIs
StatePublished - May 1 2002

Fingerprint

Phase separation
Electronic scales
Colossal magnetoresistance
Manganites
Electron correlations
electronics
homogeneity
Electrons
inhomogeneity
electrons
degrees of freedom
disorders
La2CuO4

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Keywords

  • (La,Pr,Ca)MnO
  • LaCuO
  • Manganites
  • MgB
  • Phase ordering
  • Stripes

Cite this

Cheong, Sang-Wook ; Sharma, P. A. ; Hur, N. ; Horibe, Y. ; Chen, C. H. / Electronic phase separation in complex materials. In: Physica B: Condensed Matter. 2002 ; Vol. 318, No. 1. pp. 39-51.
@article{833046495d1d42d7adce3b5e233b2a44,
title = "Electronic phase separation in complex materials",
abstract = "It has been common practice for physicists to assume electronic homogeneity when dealing with condensed matter properties. Recent experimental development, which have revealed fascinating properties of complex materials, demonstrate that such extraordinary macroscopic properties are often associated with microscopic-scale electronic/magnetic inhomogeneity, which limits the Hamitonian-type theoretical approach. Herein, we discuss the microscopic coexistence of metallic and insulating phases in novel materials having an intricate interplay among charge/spin/lattice degrees of freedom. Examples include the coexistence of superconducting-metallic and insulating phases in La2CuO4+δ as well as Mg1-xB2. The insulating nature in La2CuO4+δ originates from electron-electron correlation, but disorder plays a dominant role in producing the insulating behavior in Mg-deficient Mg1-xB2. We also examine the microscopic coexistence of ferromagnetic-metallic and charge-ordered-insulating phases in mixed-valent manganites, exhibiting colossal magnetoresistance. Possible origins of this electronic phase separation are discussed.",
keywords = "(La,Pr,Ca)MnO, LaCuO, Manganites, MgB, Phase ordering, Stripes",
author = "Sang-Wook Cheong and Sharma, {P. A.} and N. Hur and Y. Horibe and Chen, {C. H.}",
year = "2002",
month = "5",
day = "1",
doi = "https://doi.org/10.1016/S0921-4526(02)00772-X",
language = "English (US)",
volume = "318",
pages = "39--51",
journal = "Physica B: Physics of Condensed Matter",
issn = "0921-4526",
publisher = "Elsevier",
number = "1",

}

Electronic phase separation in complex materials. / Cheong, Sang-Wook; Sharma, P. A.; Hur, N.; Horibe, Y.; Chen, C. H.

In: Physica B: Condensed Matter, Vol. 318, No. 1, 01.05.2002, p. 39-51.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Electronic phase separation in complex materials

AU - Cheong, Sang-Wook

AU - Sharma, P. A.

AU - Hur, N.

AU - Horibe, Y.

AU - Chen, C. H.

PY - 2002/5/1

Y1 - 2002/5/1

N2 - It has been common practice for physicists to assume electronic homogeneity when dealing with condensed matter properties. Recent experimental development, which have revealed fascinating properties of complex materials, demonstrate that such extraordinary macroscopic properties are often associated with microscopic-scale electronic/magnetic inhomogeneity, which limits the Hamitonian-type theoretical approach. Herein, we discuss the microscopic coexistence of metallic and insulating phases in novel materials having an intricate interplay among charge/spin/lattice degrees of freedom. Examples include the coexistence of superconducting-metallic and insulating phases in La2CuO4+δ as well as Mg1-xB2. The insulating nature in La2CuO4+δ originates from electron-electron correlation, but disorder plays a dominant role in producing the insulating behavior in Mg-deficient Mg1-xB2. We also examine the microscopic coexistence of ferromagnetic-metallic and charge-ordered-insulating phases in mixed-valent manganites, exhibiting colossal magnetoresistance. Possible origins of this electronic phase separation are discussed.

AB - It has been common practice for physicists to assume electronic homogeneity when dealing with condensed matter properties. Recent experimental development, which have revealed fascinating properties of complex materials, demonstrate that such extraordinary macroscopic properties are often associated with microscopic-scale electronic/magnetic inhomogeneity, which limits the Hamitonian-type theoretical approach. Herein, we discuss the microscopic coexistence of metallic and insulating phases in novel materials having an intricate interplay among charge/spin/lattice degrees of freedom. Examples include the coexistence of superconducting-metallic and insulating phases in La2CuO4+δ as well as Mg1-xB2. The insulating nature in La2CuO4+δ originates from electron-electron correlation, but disorder plays a dominant role in producing the insulating behavior in Mg-deficient Mg1-xB2. We also examine the microscopic coexistence of ferromagnetic-metallic and charge-ordered-insulating phases in mixed-valent manganites, exhibiting colossal magnetoresistance. Possible origins of this electronic phase separation are discussed.

KW - (La,Pr,Ca)MnO

KW - LaCuO

KW - Manganites

KW - MgB

KW - Phase ordering

KW - Stripes

UR - http://www.scopus.com/inward/record.url?scp=0036566720&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036566720&partnerID=8YFLogxK

U2 - https://doi.org/10.1016/S0921-4526(02)00772-X

DO - https://doi.org/10.1016/S0921-4526(02)00772-X

M3 - Article

VL - 318

SP - 39

EP - 51

JO - Physica B: Physics of Condensed Matter

JF - Physica B: Physics of Condensed Matter

SN - 0921-4526

IS - 1

ER -