dc.contributor.author |
Xu, B |
en |
dc.contributor.author |
Cappelluti, E |
en |
dc.contributor.author |
Benfatto, L |
en |
dc.contributor.author |
Mallett, Benjamin |
en |
dc.contributor.author |
Marsik, P |
en |
dc.contributor.author |
Sheveleva, E |
en |
dc.contributor.author |
Lyzwa, F |
en |
dc.contributor.author |
Wolf, Th |
en |
dc.contributor.author |
Yang, R |
en |
dc.contributor.author |
Qiu, XG |
en |
dc.contributor.author |
Dai, YM |
en |
dc.contributor.author |
Wen, HH |
en |
dc.contributor.author |
Lobo, RPSM |
en |
dc.contributor.author |
Bernhard, C |
en |
dc.date.accessioned |
2019-11-26T02:40:24Z |
en |
dc.date.issued |
2019-05 |
en |
dc.identifier.citation |
Physical review letters 122(21):217002 May 2019 |
en |
dc.identifier.issn |
0031-9007 |
en |
dc.identifier.uri |
http://hdl.handle.net/2292/49229 |
en |
dc.description.abstract |
By means of infrared spectroscopy, we determine the temperature-doping phase diagram of the Fano effect for the in-plane Fe-As stretching mode in Ba_{1-x}K_{x}Fe_{2}As_{2}. The Fano parameter 1/q^{2}, which is a measure of the phonon coupling to the electronic particle-hole continuum, shows a remarkable sensitivity to the magnetic and structural orderings at low temperatures. Most strikingly, at elevated temperatures in the paramagnetic tetragonal state we observe a linear correlation between 1/q^{2} and the superconducting critical temperature T_{c}. Based on theoretical calculations and symmetry considerations, we identify the relevant interband transitions that are coupled to the Fe-As mode. In particular, we show that a sizable xy orbital component at the Fermi level is fundamental for the Fano effect and, thus, possibly also for the superconducting pairing. |
en |
dc.format.medium |
Print |
en |
dc.language |
eng |
en |
dc.relation.ispartofseries |
Physical review letters |
en |
dc.rights |
Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. |
en |
dc.rights.uri |
https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm |
en |
dc.rights.uri |
https://journals.aps.org/copyrightFAQ.html#post |
en |
dc.title |
Scaling of the Fano Effect of the In-Plane Fe-As Phonon and the Superconducting Critical Temperature in Ba_{1-x}K_{x}Fe_{2}As_{2}. |
en |
dc.type |
Journal Article |
en |
dc.identifier.doi |
10.1103/physrevlett.122.217002 |
en |
pubs.issue |
21 |
en |
pubs.begin-page |
217002 |
en |
pubs.volume |
122 |
en |
dc.rights.holder |
Copyright: American Physical Society |
en |
pubs.publication-status |
Published |
en |
dc.rights.accessrights |
http://purl.org/eprint/accessRights/OpenAccess |
en |
pubs.subtype |
Journal Article |
en |
pubs.elements-id |
774553 |
en |
pubs.org-id |
Science |
en |
pubs.org-id |
Physics |
en |
dc.identifier.eissn |
1079-7114 |
en |
pubs.record-created-at-source-date |
2019-07-09 |
en |
pubs.dimensions-id |
31283343 |
en |