Low-energy interband transitions in the infrared response of
Ba(Fe1-xCox)(2)As-2

J 2013

Low-energy interband transitions in the infrared response of Ba(Fe1-xCox)(2)As-2

MARŠÍK, Přemysl; C. N. WANG; M. ROESSLE; M. YAZDI-RIZI; Roman SCHUSTER et. al.

Basic information

Original name

Low-energy interband transitions in the infrared response of Ba(Fe1-xCox)(2)As-2

Authors

MARŠÍK, Přemysl (203 Czech Republic); C. N. WANG (156 China); M. ROESSLE (276 Germany); M. YAZDI-RIZI (364 Islamic Republic of Iran); Roman SCHUSTER (276 Germany); K. W. KIM (410 Republic of Korea); Adam DUBROKA (203 Czech Republic, guarantor, belonging to the institution); Dominik MUNZAR (203 Czech Republic, belonging to the institution); T. WOLF (276 Germany); X. H. CHEN (156 China) and Christian BERNHARD (276 Germany)

Edition

Physical Review B, USA, The American Physical Society, 2013, 1098-0121

Other information

Language

English

Type of outcome

Article in a journal

Field of Study

10302 Condensed matter physics

Country of publisher

United States of America

Confidentiality degree

is not subject to a state or trade secret

References:

URL

Impact factor

Impact factor: 3.664

RIV identification code

RIV/00216224:14740/13:00071179

Organization unit

Central European Institute of Technology

DOI

http://dx.doi.org/10.1103/PhysRevB.88.180508

UT WoS

000327153300002

Keywords in English

T-C SUPERCONDUCTORS; TEMPERATURE SUPERCONDUCTIVITY; IRON; ELECTRODYNAMICS

Abstract

In the original language

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.

Links

ED1.1.00/02.0068, research and development project

Name: CEITEC - central european institute of technology

Cite

MARŠÍK, Přemysl; C. N. WANG; M. ROESSLE; M. YAZDI-RIZI; Roman SCHUSTER; K. W. KIM; Adam DUBROKA; Dominik MUNZAR; T. WOLF; X. H. CHEN and Christian BERNHARD. Low-energy interband transitions in the infrared response of Ba(Fe1-xCox)(2)As-2. Physical Review B. USA: The American Physical Society, 2013, vol. 88, No 18, p. "180508-1"-"180508-5", 5 pp. ISSN 1098-0121. Available from: https://dx.doi.org/10.1103/PhysRevB.88.180508.

@article{1160082,
   author = {Maršík, Přemysl and Wang, C. N. and Roessle, M. and YazdiandRizi, M. and Schuster, Roman and Kim, K. W. and Dubroka, Adam and Munzar, Dominik and Wolf, T. and Chen, X. H. and Bernhard, Christian},
   article_location = {USA},
   article_number = {18},
   doi = {http://dx.doi.org/10.1103/PhysRevB.88.180508},
   keywords = {T-C SUPERCONDUCTORS; TEMPERATURE SUPERCONDUCTIVITY; IRON; ELECTRODYNAMICS},
   language = {eng},
   issn = {1098-0121},
   journal = {Physical Review B},
   title = {Low-energy interband transitions in the infrared response of Ba(Fe1-xCox)(2)As-2},
   url = {http://prb.aps.org/abstract/PRB/v88/i18/e180508},
   volume = {88},
   year = {2013}
}

TY  - JOUR
ID  - 1160082
AU  - Maršík, Přemysl - Wang, C. N. - Roessle, M. - Yazdi-Rizi, M. - Schuster, Roman - Kim, K. W. - Dubroka, Adam - Munzar, Dominik - Wolf, T. - Chen, X. H. - Bernhard, Christian
PY  - 2013
TI  - Low-energy interband transitions in the infrared response of Ba(Fe1-xCox)(2)As-2
JF  - Physical Review B
VL  - 88
IS  - 18
SP  - "180508-1"-"180508-5"
EP  - "180508-1"-"180508-5"
PB  - The American Physical Society
SN  - 10980121
KW  - T-C SUPERCONDUCTORS
KW  - TEMPERATURE SUPERCONDUCTIVITY
KW  - IRON
KW  - ELECTRODYNAMICS
UR  - http://prb.aps.org/abstract/PRB/v88/i18/e180508
L2  - http://prb.aps.org/abstract/PRB/v88/i18/e180508
N2  - 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.
ER  -

MARŠÍK, Přemysl; C. N. WANG; M. ROESSLE; M. YAZDI-RIZI; Roman SCHUSTER; K. W. KIM; Adam DUBROKA; Dominik MUNZAR; T. WOLF; X. H. CHEN and Christian BERNHARD. Low-energy interband transitions in the infrared response of Ba(Fe1-xCox)(2)As-2. \textit{Physical Review B}. USA: The American Physical Society, 2013, vol.~88, No~18, p.~''180508-1''-''180508-5'', 5 pp. ISSN~1098-0121. Available from: https://dx.doi.org/10.1103/PhysRevB.88.180508.

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