Published January 2018 | Version v1
Journal article Metadata-only

Antiferromagnetic ordering in organic conductor λ-(BEDT-TTF)2GaCl4 probed by 13C NMR

Creators

  • 1. Hokkaido University, Department of Physics, Sapporo, Hokkaido (Japan)
  • 2. Tokyo University, Institute for Solid State Physics, Kashiwa, Chiba (Japan)

Description

The ground state of λ-(BEDT-TTF)2GaCl4, which has the same structure as the organic superconductor λ-(BETS)2GaCl4, was investigated by magnetic susceptibility and 13C NMR measurements. The temperature dependence of the magnetic susceptibility revealed an antiferromagnetic (AF) correlation with J/kB ≃ 98 K. NMR spectrum splitting and the divergence of 1/T1 were observed at approximately 13 K, which is associated with the AF transition. We found that the AF structure is commensurate according to discrete NMR peak splitting, suggesting that the ground state of λ-(BEDT-TTF)2GaCl4 is an AF dimer-Mott insulating state. Our results suggest that the superconducting phase of λ-type salts would be located near the AF insulating phase. (author)

Availability note (English)

Available from http://dx.doi.org/10.7566/JPSJ.87.013707

Additional details

Identifiers

DOI
10.7566/JPSJ.87.013707;

Publishing Information

Journal Title
Journal of the Physical Society of Japan (Online)
Journal Volume
87
Journal Issue
1
Journal Page Range
p. 013707.1-013707.4
ISSN
1347-4073

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
49051977
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
BEDT-TTF; CARBON 13; ELECTRICAL INSULATORS; ELECTRON SPIN RESONANCE; FINE STRUCTURE; GALLIUM CHLORIDES; HEISENBERG MODEL; MAGNETIC SUSCEPTIBILITY; NEEL TEMPERATURE; NUCLEAR MAGNETIC RESONANCE; PRESSURE RANGE GIGA PA; SPECIFIC HEAT; SPIN-LATTICE RELAXATION; SUPERCONDUCTIVITY
Descriptors DEC
CARBON ISOTOPES; CHLORIDES; CHLORINE COMPOUNDS; CRYSTAL MODELS; ELECTRIC CONDUCTIVITY; ELECTRICAL EQUIPMENT; ELECTRICAL PROPERTIES; EQUIPMENT; EVEN-ODD NUCLEI; GALLIUM COMPOUNDS; GALLIUM HALIDES; HALIDES; HALOGEN COMPOUNDS; HETEROCYCLIC COMPOUNDS; ISOTOPES; LIGHT NUCLEI; MAGNETIC PROPERTIES; MAGNETIC RESONANCE; MATHEMATICAL MODELS; NUCLEI; ORGANIC COMPOUNDS; ORGANIC SULFUR COMPOUNDS; ORGANIC SUPERCONDUCTORS; PHYSICAL PROPERTIES; PRESSURE RANGE; RELAXATION; RESONANCE; STABLE ISOTOPES; SUPERCONDUCTORS; THERMODYNAMIC PROPERTIES; TRANSITION TEMPERATURE

Optional Information

Notes
27 refs., 4 figs.