Deuterated κ-(BEDT-TTF $)_{2}$ Cu[N(CN $)_{2}$ ]Br: A system on the borderof the superconductor–magnetic-insulator transition

1 June 1997

journal article
research article
Published by American Physical Society (APS) in Physical Review B

Vol. 55 (21) , 14140-14143
https://doi.org/10.1103/physrevb.55.14140

Abstract

The electronic state of the deuterated salt of the organic system κ-(BEDT-TTF

)_{2}

Cu[N(CN

)_{2}

]Br, has been investigated by dc/ac susceptibility and

{}^{1}/^{13}

C NMR measurements. We found that the system is situated in the critical region of the transition between a superconducting phase with a

T_{C}

of ∼11.5 K and an antiferromagnetic phase with a

T_{N}

of 14–15 K. It was also found that the rapid cooling through 80 K drives the superconducting phase into the magnetic phase, that is discussed in the light of the role of disorder near the Mott transition.

Keywords

This publication has 25 references indexed in Scilit:

Recent progress in NMR studies on organic conductors
Hyperfine Interactions, 1997
Kawamotoet al.Reply:
Physical Review Letters, 1995
Electronic States of Conducting Organic κ-(BEDT-TTF)₂X
Journal of the Physics Society Japan, 1995
Antiferromagnetic Ordering and Spin Structure in the Organic Conductor, $κ$ -(BEDT-TTF $)_{2}$ Cu[N(CN $)_{2}$ ]Cl
Physical Review Letters, 1995
$^{13}$ C NMR Study of Layered Organic Superconductors Based on BEDT-TTF Molecules
Physical Review Letters, 1995
¹³ C NMR Study of a Quasi-Two-Dimensional Organic Superconductor κ-(ET) ₂ Cu[N(CN) ₂ ]Br
Europhysics Letters, 1994
Pressure-temperature phase diagram, inverse isotope effect, and superconductivity in excess of 13 K in κ-(BEDT-TTF $)_{2}$ Cu[N(CN $)_{2}$ ]Cl, where BEDT-TTF is bis(ethylenedithio)tetrathiafulvalene
Physical Review B, 1991
From semiconductor-semiconductor transition (42 K) to the highest-Tc organic superconductor, .kappa.-(ET)2Cu[N(CN)2]Cl (Tc = 12.5 K)
Inorganic Chemistry, 1990
A new ambient-pressure organic superconductor, .kappa.-(ET)2Cu[N(CN)2]Br, with the highest transition temperature yet observed (inductive onset Tc = 11.6 K, resistive onset = 12.5 K)
Inorganic Chemistry, 1990
A New Ambient Pressure Organic Superconductor Based on BEDT-TTF with TC Higher than 10 K (TC=10.4 K)
Chemistry Letters, 1988

Deuterated κ-(BEDT-TTF)2Cu[N(CN)2]Br: A system on the borderof the superconductor–magnetic-insulator transition

Abstract

Keywords

Deuterated κ-(BEDT-TTF $)_{2}$ Cu[N(CN $)_{2}$ ]Br: A system on the borderof the superconductor–magnetic-insulator transition