Electronic Dispersion Anomalies in the Iron Pnictide Superconductors

Heimes, Andreas, Grein, Roland and Eschrig, Matthias

(2011)

Heimes, Andreas, Grein, Roland and Eschrig, Matthias (2011) Electronic Dispersion Anomalies in the Iron Pnictide Superconductors. Physical Review Letters, 106 (4).

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Abstract

Recently, experimental studies of the spin excitation spectrum revealed, like in the cuprates, a strong temperature dependence in the normal state and a resonance feature in the superconducting state. Based on these findings, we develop a model of electrons interacting with a temperature dependent magnetic excitation spectrum and apply it to analyse angle resolved photoemission and tunnelling spectra in Ba1-xKxFe2As2. We reproduce in quantitative agreement with experiment a renormalisation of the quasiparticle dispersion both in the normal and the superconducting state, and the dependence of the quasiparticle linewidth on binding energy. We estimate the strength of the coupling between electronic and spin excitations. Our findings support a dominantly magnetic pairing mechanism.

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This is a Submitted version
This version's date is: 28/1/2011
This item is not peer reviewed

Link to this Version

https://repository.royalholloway.ac.uk/items/8f170b1b-944a-fdb7-d661-df5d56b3845b/4/

Item TypeMonograph
TitleElectronic Dispersion Anomalies in the Iron Pnictide Superconductors
AuthorsHeimes, Andreas
Grein, Roland
Eschrig, Matthias
DepartmentsFaculty of Science\Physics
Research Groups and Centres\Physics\Low Temperature Physics

Identifiers

doihttp://dx.doi.org/10.1103/PhysRevLett.106.047003

Deposited by Research Information System (atira) on 27-Jan-2013 in Royal Holloway Research Online.Last modified on 27-Jan-2013

Notes

4 pages, 3 figures, supplemental material


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