Beyond the quantum spin liquid concept in frustrated two dimensional organic superconductors

R. T. Clay, S. Dayal, H. Li, Sumitendra Mazumdar

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The occurrence of antiferromagnetism (AFM) in κ-(ET) 2X can be understood within an effective 1/2-filled band with dimers of ET molecules containing one hole each. We argue that while this effective model can describe the presence of AFM, a complete description for these materials requires the correct carrier density of one-half per molecule. For dimerized and strongly frustrated 1/4-filled lattices we show that a singlet-paired statecoexisting with charge ordering occurs that we have termed the paired electron crystal (PEC). Here we investigate the 1/4-filled model on a dimerized lattice, showing regions where AFM, PEC, and the Wigner-crystal occur. We point out the need to go beyond quantum spin liquid concepts for highly frustrated materials such as κ-(ET) 2Cu 2(CN) 3 and β′-EtMe 3Sb[Pd(dmit) 2] 2 which we believe are PECs at low temperatures.

Original languageEnglish (US)
Pages (from-to)991-994
Number of pages4
JournalPhysica Status Solidi (B) Basic Research
Volume249
Issue number5
DOIs
StatePublished - May 2012

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Antiferromagnetism
organic superconductors
antiferromagnetism
Superconducting materials
Crystals
Liquids
liquids
crystals
Molecules
Electrons
Crystal lattices
Dimers
Carrier concentration
molecules
electrons
dimers
occurrences
Temperature

Keywords

  • Lattice frustration
  • Organic superconductors
  • Spin liquids
  • Strong correlations

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Beyond the quantum spin liquid concept in frustrated two dimensional organic superconductors. / Clay, R. T.; Dayal, S.; Li, H.; Mazumdar, Sumitendra.

In: Physica Status Solidi (B) Basic Research, Vol. 249, No. 5, 05.2012, p. 991-994.

Research output: Contribution to journalArticle

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