Nonrigid band shift and nonmonotonic electronic structure changes upon doping in the normal state of the pnictide high-temperature superconductor
Abstract
© 2016 American Physical Society. We report systematic angle-resolved photoemission (ARPES) experiments using different photon polarizations and experimental geometries and find that the doping evolution of the normal state of Ba(Fe1-xCox)2As2 deviates significantly from the predictions of a rigid band model. The data reveal a nonmonotonic dependence upon doping of key quantities such as band filling, bandwidth of the electron pocket, and quasiparticle coherence. Our analysis suggests that the observed phenomenology and the inapplicability of the rigid band model in Co-doped Ba122 are due to electronic correlations, and not to the either the strength of the impurity potential, or self-energy effects due to impurity scattering. Our findings indicate that the effects of doping in pnictides are much more complicated than currently believed. More generally, they indicate that a deep understanding of the evolution of the electronic properties of the normal state, which requires an understanding of the doping process, remains elusive even for the 122 iron-pnictides, which are viewed as the least correlated of the high-TC unconventional superconductors.
- Authors:
-
- Univ. of Tennessee, Knoxville, TN (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Univ. of Missouri, Columbia, MO (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States); State Univ. of New York, Stony Brook, NY (United States)
- Univ. of Tennessee, Knoxville, TN (United States); Shanghai Jiao Tong Univ., Shanghai (China)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1334493
- Alternate Identifier(s):
- OSTI ID: 1333605; OSTI ID: 1398443
- Grant/Contract Number:
- AC05-00OR22725; AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 94; Journal Issue: 19; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Vilmercati, Paolo, Mo, Sung -Kwan, Fedorov, Alexei, McGuire, Michael A., Sefat, Athena Safa, Sales, Brian C., Mandrus, David, Singh, David J., Ku, Wei, Johnston, Steve, and Mannella, Norman. Nonrigid band shift and nonmonotonic electronic structure changes upon doping in the normal state of the pnictide high-temperature superconductor Ba(Fe1-xCox)2As2. United States: N. p., 2016.
Web. doi:10.1103/PhysRevB.94.195147.
Vilmercati, Paolo, Mo, Sung -Kwan, Fedorov, Alexei, McGuire, Michael A., Sefat, Athena Safa, Sales, Brian C., Mandrus, David, Singh, David J., Ku, Wei, Johnston, Steve, & Mannella, Norman. Nonrigid band shift and nonmonotonic electronic structure changes upon doping in the normal state of the pnictide high-temperature superconductor Ba(Fe1-xCox)2As2. United States. https://doi.org/10.1103/PhysRevB.94.195147
Vilmercati, Paolo, Mo, Sung -Kwan, Fedorov, Alexei, McGuire, Michael A., Sefat, Athena Safa, Sales, Brian C., Mandrus, David, Singh, David J., Ku, Wei, Johnston, Steve, and Mannella, Norman. Mon .
"Nonrigid band shift and nonmonotonic electronic structure changes upon doping in the normal state of the pnictide high-temperature superconductor Ba(Fe1-xCox)2As2". United States. https://doi.org/10.1103/PhysRevB.94.195147. https://www.osti.gov/servlets/purl/1334493.
@article{osti_1334493,
title = {Nonrigid band shift and nonmonotonic electronic structure changes upon doping in the normal state of the pnictide high-temperature superconductor Ba(Fe1-xCox)2As2},
author = {Vilmercati, Paolo and Mo, Sung -Kwan and Fedorov, Alexei and McGuire, Michael A. and Sefat, Athena Safa and Sales, Brian C. and Mandrus, David and Singh, David J. and Ku, Wei and Johnston, Steve and Mannella, Norman},
abstractNote = {© 2016 American Physical Society. We report systematic angle-resolved photoemission (ARPES) experiments using different photon polarizations and experimental geometries and find that the doping evolution of the normal state of Ba(Fe1-xCox)2As2 deviates significantly from the predictions of a rigid band model. The data reveal a nonmonotonic dependence upon doping of key quantities such as band filling, bandwidth of the electron pocket, and quasiparticle coherence. Our analysis suggests that the observed phenomenology and the inapplicability of the rigid band model in Co-doped Ba122 are due to electronic correlations, and not to the either the strength of the impurity potential, or self-energy effects due to impurity scattering. Our findings indicate that the effects of doping in pnictides are much more complicated than currently believed. More generally, they indicate that a deep understanding of the evolution of the electronic properties of the normal state, which requires an understanding of the doping process, remains elusive even for the 122 iron-pnictides, which are viewed as the least correlated of the high-TC unconventional superconductors.},
doi = {10.1103/PhysRevB.94.195147},
journal = {Physical Review B},
number = 19,
volume = 94,
place = {United States},
year = {Mon Nov 28 00:00:00 EST 2016},
month = {Mon Nov 28 00:00:00 EST 2016}
}
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Works referencing / citing this record:
Effect of electron doping in FeTe 1− y Se y realized by Co and Ni substitution
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