Work

Both Electron and Hole Dirac Cone States in Ba(FeAs)2 Confirmed by Magnetoresistance

Year: 2011

Type: article

Abstract: Quantum transport of Dirac cone states in the iron pnictide Ba(FeAs)(2) with a d-multiband system is studied by using single crystal samples. Transverse magnetoresistance develops linearly against the magnetic field at low temperatures. The transport phenomena are interpreted in terms of the zeroth Landau level by applying the theory predicted by Abrikosov. The results of the semiclassical analyses of a two carrier system in a low magnetic field limit show that both the electron and hole reside as the high mobility states. Our results show that pairs of electron and hole Dirac cone states must be taken into account for an accurate interpretation in iron pnictides, which is in contrast with previous studies.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.106.217004

Authors: Khuong K. Huynh, Yoichi Tanabe, Katsumi Tanigaki

Institution: Tohoku University

Language: Latvian

Topic: Iron-based superconductors research

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funder: Japan Society for the Promotion of Science

Award: Impurity substitution effect on Dirac cone in iron pnictide superconductors