Quasiparticle Line Shape of Sr2RuO4 and its Relation to Anisotropic Transport

Authors

S.-C. Wang, Boston College
H.-B. Yang, Boston CollegeFollow
A. K. P. Sekharan, Boston College
H. Ding, Boston CollegeFollow
J. R. Engelbrecht, Boston College
X. Dai, Boston College
Z. Whang, Boston College
A. Kaminski, University of Wales--Swansea
T. Valla, Brookhaven National LaboratoryFollow
T. Kidd, Brookhaven National LaboratoryFollow
A. V. Fedorov, Brookhaven National LaboratoryFollow
P. D. Johnson, Brookhaven National LaboratoryFollow

Document Type

Article

Journal/Book/Conference Title Title

Physical Review Letters

Volume

92

Issue

13

First Page

137002-1

Last Page

137002-4

Abstract

The bulk-representative low-energy spectrum of Sr₂RuO₄ can be directly measured by angle-resolved photoemission. We find that the quasiparticle spectral line shape of Sr₂RuO₄ is sensitive to both temperature and momentum. Along the (0, 0)-(π, 0) direction, both gamma and ß bands develop a sharp quasiparticle peak near k_F at low temperatures, but as the temperature increases the spectra quickly lose coherent weight and become broad backgrounds above ~130 K, which is the metal-nonmetal crossover temperature, T_M, in the c-axis resistivity. However, spectra along the (0, 0)-(π, π) direction evolve smoothly across T_M. A simple transport model can describe both in-plane and c-axis resistivity in terms of the quasiparticle line shape. Comparisons are also made to the cuprates, with implications for two dimensionality, magnetic fluctuations, and superconductivity

Department

Department of Physics

Comments

First published in Physical Review Letters, v. 92, n. 13 (2004), published by the American Physical Society. DOI: 10.1103/PhysRevLett.92.137002

Original Publication Date

4-2004

DOI of published version

10.1103/PhysRevLett.92.137002

Repository

UNI ScholarWorks, University of Northern Iowa, Rod Library

Copyright

©2004 S.-C. Wang, H.-B. Yang, A.K.P. Sekharan, H. Ding, J.R. Engelbrecht, X. Dai, Z. Wang, A. Kaminski, T. Valla, T. Kidd, A.V. Fedorov, and P.D. Johnson. the copyright holder has granted permission for posting.

Date Digital

2004

Language

EN

File Format

application/pdf

Recommended Citation

Wang, S.-C.; Yang, H.-B.; Sekharan, A. K. P.; Ding, H.; Engelbrecht, J. R.; Dai, X.; Whang, Z.; Kaminski, A.; Valla, T.; Kidd, T.; Fedorov, A. V.; and Johnson, P. D., "Quasiparticle Line Shape of Sr2RuO4 and its Relation to Anisotropic Transport" (2004). Faculty Publications. 15.
https://scholarworks.uni.edu/phy_facpub/15