Low-energy interband transitions in the infrared response of Ba(Fe1-xCox)(2)As-2
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14740%2F13%3A00071179" target="_blank" >RIV/00216224:14740/13:00071179 - isvavai.cz</a>
Result on the web
<a href="http://prb.aps.org/abstract/PRB/v88/i18/e180508" target="_blank" >http://prb.aps.org/abstract/PRB/v88/i18/e180508</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevB.88.180508" target="_blank" >10.1103/PhysRevB.88.180508</a>
Alternative languages
Result language
angličtina
Original language name
Low-energy interband transitions in the infrared response of Ba(Fe1-xCox)(2)As-2
Original language description
We studied the doping and temperature (T) dependence of the infrared (IR) response of Ba(Fe1_xCox)2As2 single crystals. We show that a weak band around 1000 cm_1, that was previously interpreted in terms of interaction of the charge carriers with magnetic excitations or of a pseudogap, is rather related to low energy interband transitions. Specifically, we show that this band exhibits a similar doping and T dependence as the hole pockets seen by angle resolved photoemission spectroscopy (ARPES). Notably, we find that it vanishes as a function of doping near the critical point where superconductivity is suppressed in the overdoped regime. Our IR data thus provide bulk specific information (complementary to the surface sensitive ARPES) for a Lifshitz transition. Our IR data also reveal a second low-energy band around 2300 cm_1 which further emphasizes the necessity to consider the multiband nature of these iron arsenides in the analysis of the optical response.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Result continuities
Project
<a href="/en/project/ED1.1.00%2F02.0068" target="_blank" >ED1.1.00/02.0068: Central european institute of technology</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review B
ISSN
1098-0121
e-ISSN
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Volume of the periodical
88
Issue of the periodical within the volume
18
Country of publishing house
US - UNITED STATES
Number of pages
5
Pages from-to
"180508"-"1"-"180508"-"5"
UT code for WoS article
000327153300002
EID of the result in the Scopus database
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