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Complex spectral evolution in a BCS superconductor, ZrB12
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Thakur, Sangeeta, Biswas, Deepnarayan, Sahadev, Nishaina, Biswas, P. K., Balakrishnan, Geetha and Maiti, Kalobaran (2013) Complex spectral evolution in a BCS superconductor, ZrB12. Scientific Reports, Volume 3 . Article number 3342. doi:10.1038/srep03342 ISSN 2045-2322.
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WRAP_Balakrishnan_srep03342.pdf - Published Version Available under License ["licenses_description_cc_by_nc_nd_2" not defined]. Download (1862Kb) | Preview |
Official URL: http://dx.doi.org/10.1038/srep03342
Abstract
We investigate the electronic structure of a complex conventional superconductor, ZrB12 employing high resolution photoemission spectroscopy and ab initio band structure calculations. The experimental valence band spectra could be described reasonably well within the local density approximation. Energy bands close to the Fermi level possess t2g symmetry and the Fermi level is found to be in the proximity of quantum fluctuation regime. The spectral lineshape in the high resolution spectra is complex exhibiting signature of a deviation from Fermi liquid behavior. A dip at the Fermi level emerges above the superconducting transition temperature that gradually grows with the decrease in temperature. The spectral simulation of the dip and spectral lineshape based on a phenomenological self energy suggests finite electron pair lifetime and a pseudogap above the superconducting transition temperature.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Library of Congress Subject Headings (LCSH): | Superconductors, Electronic structure , Energy bands | ||||
Journal or Publication Title: | Scientific Reports | ||||
Publisher: | Nature Publishing Group | ||||
ISSN: | 2045-2322 | ||||
Official Date: | 26 November 2013 | ||||
Dates: |
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Volume: | Volume 3 | ||||
Page Range: | Article number 3342 | ||||
DOI: | 10.1038/srep03342 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Open Access (Creative Commons) | ||||
Date of first compliant deposit: | 26 December 2015 | ||||
Date of first compliant Open Access: | 26 December 2015 | ||||
Funder: | India, Engineering and Physical Sciences Research Council (EPSRC) | ||||
Grant number: | EP/I007210/1 (EPSRC) |
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