Campus Units

Physics and Astronomy, Ames Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

2-8-2013

Journal or Book Title

Physical Review Letters

Volume

110

Issue

6

First Page

067002

DOI

10.1103/PhysRevLett.110.067002

Abstract

We have performed detailed studies of the temperature evolution of the electronic structure in Ba(Fe1−xRux)2As2 using angle resolved photoemission spectroscopy. Surprisingly, we find that the binding energy of both hole and electron bands changes significantly with temperature in both pure and Ru substituted samples. The hole and electron pockets are well nested at low temperature in unsubstituted (BaFe2As2) samples, which likely drives the spin density wave and resulting antiferromagnetic order. Upon warming, this nesting is degraded as the hole pocket shrinks and the electron pocket expands. Our results demonstrate that the temperature dependent nesting may play an important role in driving the antiferromagnetic-paramagnetic phase transition.

Comments

This article is published as Dhaka, R. S., S. E. Hahn, E. Razzoli, Rui Jiang, M. Shi, B. N. Harmon, A. Thaler, S. L. Bud’ko, P. C. Canfield, and Adam Kaminski. "Unusual temperature dependence of band dispersion in Ba (Fe 1− x Ru x) 2 As 2 and its consequences for antiferromagnetic ordering." Physical Review Letters 110, no. 6 (2013): 067002. DOI: 10.1103/PhysRevLett.110.067002. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

Published Version

Share

COinS