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Collapse of the charge ordering gap of Nd0.5Sr0.5MnO3 in an applied magnetic field

Biswas, Amlan and Arulraj, Anthony and Raychaudhuri, AK and Rao, CNR (2000) Collapse of the charge ordering gap of Nd0.5Sr0.5MnO3 in an applied magnetic field. In: Journal of Physics Condensed Matter, 12 (06). L101-L107.

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Official URL: http://www.iop.org/EJ/article/0953-8984/12/6/106/c...

Abstract

We report results of tunneling studies on the charge ordering compound Nd0.5Sr0.5MnO3 in a magnetic field up to 6 T and for temperature down to 25 K. We show that a gap (2 Delta(CO) approximate to 0.5 eV opens up in the density of state (DOS) at the Fermilevel (E-F) on charge ordering (T-CO = 150 K) which collapses in an applied magnetic field when the charge ordered state melts. There is a clear correspondence between the behaviour of the resistivity and the gap formation and its collapse in an applied magnetic field. We conclude that a gap in the DOS at E-F is necessary for the stability of the charge ordered state

Item Type: Journal Article
Additional Information: Copyright of this article belongs to IOP Publishing
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Division of Physical & Mathematical Sciences > Physics
Date Deposited: 05 Mar 2009 08:52
Last Modified: 19 Sep 2010 05:02
URI: http://eprints.iisc.ernet.in/id/eprint/18435

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