Temperature and Doping-Dependent Renormalization Effects of the Low Energy Electronic Structure of Ba1-xKxFe2As2 Single Crystals
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
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
Original language | English |
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Article number | 167001 |
Number of pages | 4 |
Journal | Physical review letters |
Volume | 102 |
Issue number | 16 |
Publication status | Published - 24 Apr 2009 |
Peer-reviewed | Yes |
Externally published | Yes |
External IDs
Scopus | 65549147190 |
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Keywords
Keywords
- NODELESS SUPERCONDUCTING GAPS, BA0.6K0.4FE2AS2, ORDER