Probing the electron-phonon coupling in MgB2 through magnetoresistance measurements in neutron irradiated thin films

被引：12

作者：

Monni, M. ^{[1
,2
,3
,4
]}

Pallecchi, I. ^{[3
,4
]}

Ferdeghini, C. ^{[3
,4
]}

Ferrando, V. ^{[3
,4
]}

Floris, A. ^{[5
]}

D'Agliano, E. Galleani ^{[3
,4
]}

Lehmann, E. ^{[6
]}

Sheikin, I. ^{[7
]}

Tarantini, C. ^{[3
,4
]}

Xi, X. X. ^{[8
]}

Massidda, S. ^{[1
,2
]}

Putti, M. ^{[3
,4
]}

机构：

[1] Univ Cagliari, SLACS, INFM, CNR, I-09124 Monserrato, Italy

[2] Univ Cagliari, Dipartimento Fis, I-09124 Monserrato, Italy

[3] Univ Genoa, LAMIA, INFM, CNR, I-16146 Genoa, Italy

[4] Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy

[5] Free Univ Berlin, Inst Theoret Phys, D-14195 Berlin, Germany

[6] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

[7] CNRS, MPI FKF, GHMFL, F-38042 Grenoble 9, France

[8] Penn State Univ, University Pk, PA 16802 USA

来源：

EPL | 2008年 / 81卷 / 06期

基金：

美国国家科学基金会; 英国科研创新办公室;

关键词：

D O I：

10.1209/0295-5075/81/67006

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report magnetoresistance ( MR) measurements on MgB2 and the corresponding full account from ab initio calculations; we suggest that this combination can be a useful tool to probe electron-phonon coupling. We obtain good quantitative agreement between high-field measurements on neutron-irradiated epitaxial thin films and calculations within Bloch-Boltzmann transport theory over a wide range of magnetic fields (0-28 T) and temperatures (40-300 K), and as a function of the field orientation. The crossovers between in-plane and out-of-plane MR, experimentally observed as a function of either disorder or temperature are well reproduced indicating that disorder and interaction with phonons strongly affect the scattering rate of sigma-carriers. Copyright (c) EPLA, 2008.

引用

页数：6

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