Dynamic disorders and its relaxation in organic superconductor κ-(BEDT-TTF)2Cu[N(CN)2]Br

X. Su, Fulin Zuo, J. A. Schlueter, M. E. Kelly, Jack M. Williams

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

In this paper, we report direct evidence of dynamic structural disorders introduced by quenching a crystal of charge transfer salt κ-(BEDT-TTF)2Cu[N(CN)2]Br superconductor from high temperatures to 77 K. The sample quenched from different high temperatures relaxes to an equilibrium state with a single relaxation time constant. The magnitude of the relaxation amplitude is dependent on the quenching temperature up to 140 K, above which all relaxation curves overlap with each other. The results suggest strongly that the 140 K is associated with the onset temperature of the order-disorder transition of ethylene groups and the transition is responsible for the anomalous lattice expansion observed at this temperature.

Original languageEnglish (US)
Pages (from-to)731-734
Number of pages4
JournalSolid State Communications
Volume107
Issue number12
DOIs
StatePublished - Aug 12 1998

Fingerprint

organic superconductors
Superconducting materials
disorders
quenching
dynamic structural analysis
Quenching
Temperature
time constant
temperature
ethylene
relaxation time
charge transfer
Order disorder transitions
salts
Structural dynamics
expansion
Relaxation time
curves
Charge transfer
Ethylene

Keywords

  • A. organic crystals
  • D. electronic transport
  • D. order-disorder effects
  • D. phase transitions

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

Cite this

Dynamic disorders and its relaxation in organic superconductor κ-(BEDT-TTF)2Cu[N(CN)2]Br. / Su, X.; Zuo, Fulin; Schlueter, J. A.; Kelly, M. E.; Williams, Jack M.

In: Solid State Communications, Vol. 107, No. 12, 12.08.1998, p. 731-734.

Research output: Contribution to journalArticle

Su, X. ; Zuo, Fulin ; Schlueter, J. A. ; Kelly, M. E. ; Williams, Jack M. / Dynamic disorders and its relaxation in organic superconductor κ-(BEDT-TTF)2Cu[N(CN)2]Br. In: Solid State Communications. 1998 ; Vol. 107, No. 12. pp. 731-734.
@article{e3b1ae5bb01d412b86f5538946697e78,
title = "Dynamic disorders and its relaxation in organic superconductor κ-(BEDT-TTF)2Cu[N(CN)2]Br",
abstract = "In this paper, we report direct evidence of dynamic structural disorders introduced by quenching a crystal of charge transfer salt κ-(BEDT-TTF)2Cu[N(CN)2]Br superconductor from high temperatures to 77 K. The sample quenched from different high temperatures relaxes to an equilibrium state with a single relaxation time constant. The magnitude of the relaxation amplitude is dependent on the quenching temperature up to 140 K, above which all relaxation curves overlap with each other. The results suggest strongly that the 140 K is associated with the onset temperature of the order-disorder transition of ethylene groups and the transition is responsible for the anomalous lattice expansion observed at this temperature.",
keywords = "A. organic crystals, D. electronic transport, D. order-disorder effects, D. phase transitions",
author = "X. Su and Fulin Zuo and Schlueter, {J. A.} and Kelly, {M. E.} and Williams, {Jack M.}",
year = "1998",
month = "8",
day = "12",
doi = "10.1016/S0038-1098(98)00294-4",
language = "English (US)",
volume = "107",
pages = "731--734",
journal = "Solid State Communications",
issn = "0038-1098",
publisher = "Elsevier Limited",
number = "12",

}

TY - JOUR

T1 - Dynamic disorders and its relaxation in organic superconductor κ-(BEDT-TTF)2Cu[N(CN)2]Br

AU - Su, X.

AU - Zuo, Fulin

AU - Schlueter, J. A.

AU - Kelly, M. E.

AU - Williams, Jack M.

PY - 1998/8/12

Y1 - 1998/8/12

N2 - In this paper, we report direct evidence of dynamic structural disorders introduced by quenching a crystal of charge transfer salt κ-(BEDT-TTF)2Cu[N(CN)2]Br superconductor from high temperatures to 77 K. The sample quenched from different high temperatures relaxes to an equilibrium state with a single relaxation time constant. The magnitude of the relaxation amplitude is dependent on the quenching temperature up to 140 K, above which all relaxation curves overlap with each other. The results suggest strongly that the 140 K is associated with the onset temperature of the order-disorder transition of ethylene groups and the transition is responsible for the anomalous lattice expansion observed at this temperature.

AB - In this paper, we report direct evidence of dynamic structural disorders introduced by quenching a crystal of charge transfer salt κ-(BEDT-TTF)2Cu[N(CN)2]Br superconductor from high temperatures to 77 K. The sample quenched from different high temperatures relaxes to an equilibrium state with a single relaxation time constant. The magnitude of the relaxation amplitude is dependent on the quenching temperature up to 140 K, above which all relaxation curves overlap with each other. The results suggest strongly that the 140 K is associated with the onset temperature of the order-disorder transition of ethylene groups and the transition is responsible for the anomalous lattice expansion observed at this temperature.

KW - A. organic crystals

KW - D. electronic transport

KW - D. order-disorder effects

KW - D. phase transitions

UR - http://www.scopus.com/inward/record.url?scp=0032139939&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032139939&partnerID=8YFLogxK

U2 - 10.1016/S0038-1098(98)00294-4

DO - 10.1016/S0038-1098(98)00294-4

M3 - Article

VL - 107

SP - 731

EP - 734

JO - Solid State Communications

JF - Solid State Communications

SN - 0038-1098

IS - 12

ER -