Effect of disorder on the charge-carrier dynamics in κ-(D8-ET)2Cu[N(CN)2]Br

被引：1
|
作者：
Brandenburg, Jens [1 ]
Mueller, Jens [1 ]
Schlueter, John A. [2 ]
机构：
[1] Goethe Univ Frankfurt, Inst Phys, D-60438 Frankfurt, Germany
[2] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA
来源：
PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 9, NO 5 | 2012年 / 9卷 / 05期
关键词：
organic metals; Mott transition; fluctuation spectroscopy; resistance noise; disorder; SUPERCONDUCTOR; TRANSITION; BEHAVIOR;
D O I：
10.1002/pssc.201100629
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
We have applied resistance fluctuation spectroscopy to study the intrinsic low-frequency dynamics of the charge carriers in the system kappa-(D-8-ET)(2)Cu[N(CN)(2)]Br for two different cooling rates. A strong increase of both the resistance and the noise level is observed below the thermodynamic glass-transition temperature T-g. Surprisingly, the data of the normalized spectral weight <(delta R)(2)>/R-2 fall on top of each other for both cooling rates except for temperatures near the Mott critical point (T-0 similar or equal to 35 K) and below 28K. The suppression of the peak in <(delta R)(2)>/R-2 associated with the Mott transition suggests that disorder is an additional parameter in the generalized phase diagram. The enhanced noise level below 28K might be explained by a disorder-induced staggered magnetic moment in the metallic state close to the antiferromagnetic Mott insulator. (C) 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
引用
收藏
页码：1171 / 1173
页数：3
相关论文
共 50 条
  • [21] Elastic anomalies of κ-(ET)2Cu[N(CN)2]Br associated with the insulator-to-metal crossover
    Simizu, T
    Yoshimoto, N
    Nakanishi, Y
    Yoshizawa, M
    ACTA PHYSICA POLONICA B, 2003, 34 (02): : 795 - 798
  • [22] STM Spectroscopy on deuterated κ-(BEDT-TTF-d[n,n])2Cu[N(CN)2]Br
    Oka, Yuki
    Abe, Ryota
    Nobukane, Hiroyoshi
    Matsunaga, Noriaki
    Nomura, Kazushige
    Ichimura, Koichi
    Kawamoto, Atsushi
    26TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT26), PTS 1-5, 2012, 400
  • [23] Magnetic ordering and charge dynamics in κ-(BEDT-TTF)2Cu [N(CN)2]Cl
    Tomic, S.
    Pinteric, M.
    Ivek, T.
    Sedlmeier, K.
    Beyer, R.
    Wu, D.
    Schlueter, J. A.
    Schweitzer, D.
    Dressel, M.
    JOURNAL OF PHYSICS-CONDENSED MATTER, 2013, 25 (43)
  • [24] Transport properties study of κ-(ET)2Cu[N(CN)2]I
    Yefanov, VS
    Tanatar, MA
    Ishiguro, T
    Ito, H
    Bondarenko, VA
    Kushch, ND
    Yagubskii, EB
    SYNTHETIC METALS, 2001, 120 (1-3) : 959 - 960
  • [25] Phonon dynamics and superconductivity in the organic crystal κ-(BEDT-TTF)2Cu[N(CN)2]Br
    Pedron, D.
    Visentini, G.
    Bozio, R.
    Williams, Jack M.
    Schlueter, John A.
    Physica C: Superconductivity and its Applications, 1997, 276 (1-2): : 1 - 8
  • [26] Specific heat of the high Tc organic superconductor k-(ET)2Cu[N(CN)2]Br
    Kopylov, V.N.
    Palnichenko, A.V.
    NATO Advanced Study Institutes Series, Series B: Physics, 1993, 305
  • [27] Lockin transition, irreversibility field, and Josephson vortex penetration depth in κ-(ET)2Cu[N(CN)2]Br
    Giannetta, RW
    Tea, NH
    Chaves, FAB
    Rao, S
    Salamon, MB
    Kini, AM
    Wang, HH
    Geiser, U
    Schlueter, J
    Trawick, MW
    Garland, JC
    PHYSICA C, 1999, 321 (3-4): : 207 - 218
  • [28] Phase diagram of the quasi-two-dimensional organic superconductor (ET)2Cu[N(CN)2]Br
    Technical Univ of Budapest, Budapest, Hungary
    Phys B Condens Matter, (1002-1004):
  • [29] Femtosecond Carrier Relaxation Dynamics and Photoinduced Phase Separation in κ-(BEDT-TTF)2Cu[N(CN)2]X (X = Br; Cl)
    Toda, Y.
    Mertelj, T.
    Naito, T.
    Mihailovic, D.
    PHYSICAL REVIEW LETTERS, 2011, 107 (22)
  • [30] Substitution effect by deuterated donors on superconductivity in κ-(BEDT-TTF)2Cu[N(CN)2]Br
    Yoneyama, N
    Sasaki, T
    Kobayashi, N
    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2004, 73 (06) : 1434 - 1437
12345