Thakur, Sangeeta, Biswas, Deepnarayan, Sahadev, Nishaina, Biswas, P. K. (Pabitra K.), Balakrishnan, Geetha and Maiti, Kalobaran (2013) Surface bulk differences in a conventional superconductor, ZrB12. Journal of Applied Physics, Volume 114 (Number 5). Article number 053904. doi:10.1063/1.4817415 ISSN 0021-8979.

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Abstract

We studied the electronic structure of a conventional superconductor, ZrB12, using high resolution x-ray photoemission spectroscopy and single crystalline samples. Experimental results with different bulk sensitivity reveal boron deficiency at the surface while the bulk is stoichiometric and different valence states of Zr at the surface relative to those in the bulk. Signature of satellite features is observed in the Zr core level spectra corresponding to the bulk of the material suggesting importance of electron correlation among the conduction electrons in the bulk while the surface appears to be uncorrelated. These results provide an insight on surface-bulk differences, which is important for fabrication of devices based on such superconductors.

Item Type:	Journal Article
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Journal or Publication Title:	Journal of Applied Physics
Publisher:	American Institute of Physics
ISSN:	0021-8979
Official Date:	2013
Dates:	Date Event 2013 Published
Volume:	Volume 114
Number:	Number 5
Page Range:	Article number 053904
DOI:	10.1063/1.4817415
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access

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