Temperature and Doping-Dependent Renormalization Effects of the Low Energy Electronic Structure of Ba1-xKxFe2As2 Single Crystals
Publikation: Beitrag in Fachzeitschrift › Forschungsartikel › Beigetragen › Begutachtung
Beitragende
Abstract
We investigate the low energy electronic structure of Ba1-xKxFe2As2 (x=0; 0.3, T-c=32 K) single crystals by angle-resolved photoemission spectroscopy with a focus on the renormalization of the dispersion. A kink feature is detected at E approximate to 25 meV for the doped compound which vanishes at T=200 K but stays virtually constant when T-c is crossed. Our experimental findings rule out the magnetic resonance mode as the origin of the kink and render conventional electron-phonon coupling unlikely. They put stringent restrictions on the dominant source of the electronic interaction channel.
Details
Originalsprache | Englisch |
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Aufsatznummer | 167001 |
Seitenumfang | 4 |
Fachzeitschrift | Physical review letters |
Jahrgang | 102 |
Ausgabenummer | 16 |
Publikationsstatus | Veröffentlicht - 24 Apr. 2009 |
Peer-Review-Status | Ja |
Extern publiziert | Ja |
Externe IDs
Scopus | 65549147190 |
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Schlagworte
Schlagwörter
- NODELESS SUPERCONDUCTING GAPS, BA0.6K0.4FE2AS2, ORDER