Mishra, Pramita and Lohani, Himanshu and Maniraj, M. and Nayak, Jayita and Zargar, R. A. and Awana, V. P. S. and Barman, Sudipta Roy and Sekhar, Biju Raja (2015) Electronic structure of the unoccupied electron energy states in FeSe1-xTex. Solid State Communications, 219. pp. 48-52. ISSN 0038-1098

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Abstract

Inverse photoemission spectroscopic (IPES) measurements along with LDA based band structure calculations have been used to investigate the unoccupied electronic structure of FeSe1-xTex system. The observed doping and temperature dependent pseudogap in this system is found to be linked to the change in the chalcogen height in their geometric structure. The depletion in spectral weight from the near E-F states at low temperature in IPES has been correlated with the enhancement of the 3z(2)-r(2) orbitals in the photoemission spectroscopy (PES). The Coulomb correlation energy U, estimated from the combined PES and IPES spectra, signifies the enhancement in electron correlations in FeSe1-xTex, with doping. The formation of pseudogap in PES and IPES confirms the importance of correlations in the 11 family of Fe superconductors.

Item Type:	Article
Uncontrolled Keywords:	Noncupratesuperconductors Electronicstructure Pseudogap Inversephotoemissionspectroscopy
Subjects:	Applied Physics/Condensed Matter
Divisions:	UNSPECIFIED
Depositing User:	Dr. Rajpal Walke
Date Deposited:	22 Sep 2016 06:49
Last Modified:	22 Sep 2016 06:49
URI:	http://npl.csircentral.net/id/eprint/1799

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