High pressure phase transition in metallic LaB6: Raman and X-ray diffraction studies

Teredesai, P and Muthu, DVS and Chandrabhas, N and Meenakshi, S and Vijayakumar, V and Modak, P and Rao, RS and Godwal, BK and Sikka, SK and Sood, AK (2004) High pressure phase transition in metallic LaB6: Raman and X-ray diffraction studies. In: Solid State Communications, 129 (12). pp. 791-796.

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Abstract

High pressure Raman and angle dispersive X-ray diffraction (ADXRD) measurements on the metallic hexaboride LaB6 have been carried out upto the pressures of about 20 GPa. The subtle phase transition around 10 GPa indicated in Raman measurements is confirmed by ADXRD experiments to be a structural change from cubic to orthorhombic phase. Ab-initio electronic band structure calculations using full potential linear augmented plane wave method carried out as a function of pressure show that this transition is driven by the interception of Fermi level by electronic band minimum around the transition pressure.

Item Type:	Journal Article
Publication:	Solid State Communications
Publisher:	Elsevier science Ltd
Additional Information:	Copyright for this article belongs to Elsevier Science Ltd.
Keywords:	LaB6;Raman scattering;X-ray diffraction;High pressure
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	26 Jul 2004
Last Modified:	19 Sep 2010 04:13
URI:	http://eprints.iisc.ac.in/id/eprint/1011

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