Hall Effect and Resistivity Study of the Magnetic Transition, Carrier Content, and Fermi-Liquid Behavior in Ba(Fe1-xCox)2As2

被引：201

作者：

Rullier-Albenque, F. ^{[1
]}

Colson, D. ^{[1
]}

Forget, A. ^{[1
]}

Alloul, H. ^{[2
]}

机构：

[1] CEA Saclay, CNRS, URA 2464, Serv Phys Etat Condense, F-91191 Gif Sur Yvette, France

[2] Univ Paris 11, Phys Solides Lab, CNRS, UMR 8502, F-91405 Orsay, France

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 05期

关键词：

PHASE-DIAGRAM; SUPERCONDUCTIVITY;

D O I：

10.1103/PhysRevLett.103.057001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The negative Hall constant R-H measured all over the phase diagram of Ba(Fe1-xCox)(2)As-2 allows us to show that electron carriers always dominate the transport properties. The evolution of R-H with x at low doping (x < 2%) indicates that important band structure changes happen for x < 2% prior to the emergence of superconductivity. For higher x, a change with T of the electron concentration is required to explain the low T variations of R-H, while the electron scattering rate displays the T-2 law expected for a Fermi liquid. The T = 0 residual scattering is affected by Co disorder in the magnetic phase, but is rather dominated by incipient disorder in the paramagnetic state.

引用

页数：4

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