Hall effect and magnetoresistance in the normal state of the superconductor LaO${}_{0.9}$F${}_{0.1-x}$FeAs

Abstract

By using a two-step method, we successfully synthesized the iron based new superconductor LaO${}_{0.9}$F${}_{0.1-x}$FeAs. The Hall effect and magnetoresistance were measured in wide temperature region. A negative Hall coefficient R_H has been found implying a dominant conduction by electron-like charge carriers in this material. The charge carrier density determined at 100K is about 9.8E20 cm-3, which is close to the cuprate superconductors. It is further found that the magnetoresistance does not follow the Kohler's law. Meanwhile, the Hall coefficient, the resistivity at 0T, and magnetoresistance all have an anomalous property at about 240K, which may be induced by the multi-band effect or by some exotic scattering mechanism.

4 pages, 4 figures; the revised version has been updated with new paper identifier arXiv:0803.1288

References in corpus (2)

• Very High Field Two-Band Superconductivity in LaFeAsO_0.89F_0.11
• Superconductivity at 25 K in hole doped $(L{a}_{1-x}S{r}_x)OFeAs$

Cited by in corpus (9)

• Very High Field Two-Band Superconductivity in LaFeAsO_0.89F_0.11
• Theory of magnetic excitations in iron-based layered superconductors
• Commensurate Spin Density Wave in LaOFeAs: A Local Probe Study
• Intrinsic Properties of Stoichiometric LaOFeP
• Strong-coupling superconductivity in layered nickel-based LaO${}_{1-x}$F${}_x$NiAs
• Density functional study of BaNi${}_2$As${}_2$: Electronic structure, phonons and electron-phonon superconductivity
• SrFeAsF as a parent compound for iron pnictide superconductors
• Magnetization Relaxation and Collective Vortex Pinning in the Fe-Based Superconductor SmFeAsO_0.9F_0.1
• Neutron scattering study of the oxypnictide superconductor La(O,F)FeAs