Campus Units
Physics and Astronomy, Ames Laboratory
Document Type
Article
Publication Version
Published Version
Publication Date
12-23-2011
Journal or Book Title
Physical Review Letters
Volume
107
Issue
26
First Page
267002
DOI
10.1103/PhysRevLett.107.267002
Abstract
We use high resolution angle-resolved photoemission to study the electronic structure of the iron based high-temperature superconductors Ba(Fe1-xRux)(2)As-2 as a function of Ru concentration. We find that substitution of Ru for Fe is isoelectronic, i.e., it does not change the value of the chemical potential. More interestingly, there are no measured, significant changes in the shape of the Fermi surface or in the Fermi velocity over a wide range of substitution levels (0 < x < 0.55). Given that the suppression of the antiferromagnetic and structural phase is associated with the emergence of the superconducting state, Ru substitution must achieve this via a mechanism that does not involve changes of the Fermi surface. We speculate that this mechanism relies on magnetic dilution which leads to the reduction of the effective Stoner enhancement.
Copyright Owner
American Physical Society
Copyright Date
2011
Language
en
File Format
application/pdf
Recommended Citation
Dhaka, R. S.; Liu, Chang; Fernandes, R. M.; Jiang, Rui; Strehlow, C. P.; Kondo, Takeshi; Thaler, Alexander N.; Schmalian, Jorg; Bud’ko, Sergey L.; Canfield, Paul C.; and Kaminski, Adam, "What Controls the Phase Diagram and Superconductivity in Ru-Substituted BaFe2As2?" (2011). Physics and Astronomy Publications. 676.
https://lib.dr.iastate.edu/physastro_pubs/676
Comments
This article is published as Dhaka, R. S., Chang Liu, Rafael M. Fernandes, Rui Jiang, C. P. Strehlow, Takeshi Kondo, A. Thaler et al. "What Controls the Phase Diagram and Superconductivity in Ru-Substituted BaFe 2 As 2?." Physical Review Letters 107, no. 26 (2011): 267002. DOI: 10.1103/PhysRevLett.107.267002. Posted with permission.