Evolution of electronic structure in CaFe2As2 and EuFe2As2 across magnetic transitions

Adhikary, Ganesh ; Sahadev, Nishaina ; Biswas, Deepnarayan ; Bindu, R. ; Kumar, Neeraj ; Thamizhavel, A. ; Dhar, S. K. ; Maiti, Kalobaran ; Ghoshray, Amitabha ; Bandyopadhyay, Bilwadal ; Mazumdar, Chandan (2011) Evolution of electronic structure in CaFe2As2 and EuFe2As2 across magnetic transitions AIP Conference Proceedings International Conference On Magnetic Materials (ICMM‐2010), 1347 . pp. 169-172. ISSN 0094243X

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Official URL: http://proceedings.aip.org/resource/2/apcpcs/1347/...

Related URL: http://dx.doi.org/10.1063/1.3601810

Abstract

We studied the electronic structure of CaFe2As2 and EuFe2As2 using high resolution photoemission spectroscopy. The Fe 2p and As 3d core‐level spectra of these two compounds show unusual features. The valence band spectra exhibit opening of a gap across SDW transitions. In EuFe2As2, the signature of antiferromagnetic transition is manifested via enhancement of Eu 4f intensity and opening of a second gap at the Fermi level. Interestingly, high resolution spectra of CaFe2As2 also reveal signature of a second gap at lower temperatures although no phase transition was observed in this temperature range.

Item Type:Article
Source:Copyright of this article belongs to American Institute of Physics.
Keywords:Magnetic Transitions; Electronic Structure; Photoemission; Superexchange Interactions
ID Code:95837
Deposited On:23 Nov 2012 12:19
Last Modified:23 Nov 2012 12:20

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