Doping and Field-Induced Insulator-Metal Transitions in Half-Doped Manganites

Cepas, O and Krishnamurthy, HR and Ramakrishnan, TV (2005) Doping and Field-Induced Insulator-Metal Transitions in Half-Doped Manganites. In: Physical Review Letters, 94 (24).

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Abstract

We argue that many properties of the half-doped manganites may be understood in terms of a new two-($e_{g}$ electron)-fluid description,which is energetically favorable at intermediate Jahn-Teller (JT)coupling. This emerges from a competition between canting of the corespins of Mn promoting mobile carriers and polaronic trapping of carriers by JT defects, in the presence of magnetic (CE), orbital and charge order. Using it we explain features of the doping and magnetic-field-induced insulator-metal transitions such as the electron-hole asymmetry and the smallness of the transition fields.

Item Type:	Journal Article
Publication:	Physical Review Letters
Publisher:	American Physical Society
Additional Information:	Copyright for this article belongs to American Physical Society.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	29 Jul 2005
Last Modified:	19 Sep 2010 04:19
URI:	http://eprints.iisc.ac.in/id/eprint/3468

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