The chemical physics of unconventional superconductivity

Sumitendra Mazumdar, Rudolf Torsten Clay

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Attempts to explain correlated-electron superconductivity (SC) have largely focused on the proximity of the superconducting state to antiferromagnetism. Yet, there exist many correlated-electron systems that exhibit insulator-superconducting transitions where the insulating state exhibits spatial broken symmetry different from antiferromagnetism. Here, we focus on a subset of such compounds which are seemingly very different in which specific chemical stoichiometries play a distinct role, and small deviations from stoichiometry can destroy SC. These superconducting materials share a unique carrier concentration, at which we show there is a stronger than usual tendency to form local spin-singlets. We posit that SC is a consequence of these pseudomolecules becoming mobile as was suggested by Schafroth a few years prior to the advent of the Bardeen-Cooper-Schrieffer (BCS) theory.

Original languageEnglish (US)
Pages (from-to)1053-1059
Number of pages7
JournalInternational Journal of Quantum Chemistry
Volume114
Issue number16
DOIs
StatePublished - 2014

Fingerprint

Superconductivity
Antiferromagnetism
superconductivity
Physics
antiferromagnetism
Stoichiometry
physics
stoichiometry
BCS theory
Electrons
Electron transitions
Superconducting materials
set theory
Carrier concentration
proximity
broken symmetry
tendencies
electrons
insulators
deviation

Keywords

  • correlated-electron superconductivity
  • insulator-superconductor transition
  • organic superconductivity
  • unconventional superconductivity

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry

Cite this

The chemical physics of unconventional superconductivity. / Mazumdar, Sumitendra; Clay, Rudolf Torsten.

In: International Journal of Quantum Chemistry, Vol. 114, No. 16, 2014, p. 1053-1059.

Research output: Contribution to journalArticle

@article{fdf1150b37324d0884951538d6ec8431,
title = "The chemical physics of unconventional superconductivity",
abstract = "Attempts to explain correlated-electron superconductivity (SC) have largely focused on the proximity of the superconducting state to antiferromagnetism. Yet, there exist many correlated-electron systems that exhibit insulator-superconducting transitions where the insulating state exhibits spatial broken symmetry different from antiferromagnetism. Here, we focus on a subset of such compounds which are seemingly very different in which specific chemical stoichiometries play a distinct role, and small deviations from stoichiometry can destroy SC. These superconducting materials share a unique carrier concentration, at which we show there is a stronger than usual tendency to form local spin-singlets. We posit that SC is a consequence of these pseudomolecules becoming mobile as was suggested by Schafroth a few years prior to the advent of the Bardeen-Cooper-Schrieffer (BCS) theory.",
keywords = "correlated-electron superconductivity, insulator-superconductor transition, organic superconductivity, unconventional superconductivity",
author = "Sumitendra Mazumdar and Clay, {Rudolf Torsten}",
year = "2014",
doi = "10.1002/qua.24637",
language = "English (US)",
volume = "114",
pages = "1053--1059",
journal = "International Journal of Quantum Chemistry",
issn = "0020-7608",
publisher = "John Wiley and Sons Inc.",
number = "16",

}

TY - JOUR

T1 - The chemical physics of unconventional superconductivity

AU - Mazumdar, Sumitendra

AU - Clay, Rudolf Torsten

PY - 2014

Y1 - 2014

N2 - Attempts to explain correlated-electron superconductivity (SC) have largely focused on the proximity of the superconducting state to antiferromagnetism. Yet, there exist many correlated-electron systems that exhibit insulator-superconducting transitions where the insulating state exhibits spatial broken symmetry different from antiferromagnetism. Here, we focus on a subset of such compounds which are seemingly very different in which specific chemical stoichiometries play a distinct role, and small deviations from stoichiometry can destroy SC. These superconducting materials share a unique carrier concentration, at which we show there is a stronger than usual tendency to form local spin-singlets. We posit that SC is a consequence of these pseudomolecules becoming mobile as was suggested by Schafroth a few years prior to the advent of the Bardeen-Cooper-Schrieffer (BCS) theory.

AB - Attempts to explain correlated-electron superconductivity (SC) have largely focused on the proximity of the superconducting state to antiferromagnetism. Yet, there exist many correlated-electron systems that exhibit insulator-superconducting transitions where the insulating state exhibits spatial broken symmetry different from antiferromagnetism. Here, we focus on a subset of such compounds which are seemingly very different in which specific chemical stoichiometries play a distinct role, and small deviations from stoichiometry can destroy SC. These superconducting materials share a unique carrier concentration, at which we show there is a stronger than usual tendency to form local spin-singlets. We posit that SC is a consequence of these pseudomolecules becoming mobile as was suggested by Schafroth a few years prior to the advent of the Bardeen-Cooper-Schrieffer (BCS) theory.

KW - correlated-electron superconductivity

KW - insulator-superconductor transition

KW - organic superconductivity

KW - unconventional superconductivity

UR - http://www.scopus.com/inward/record.url?scp=84903788158&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84903788158&partnerID=8YFLogxK

U2 - 10.1002/qua.24637

DO - 10.1002/qua.24637

M3 - Article

AN - SCOPUS:84903788158

VL - 114

SP - 1053

EP - 1059

JO - International Journal of Quantum Chemistry

JF - International Journal of Quantum Chemistry

SN - 0020-7608

IS - 16

ER -