Quantum and thermal effects in the double exchange ferromagnet

Details Quantum and thermal effects in the double exchange ferromagnet Quantum and thermal effects in the double exchange ferromagnet

2004-05-10

arxiv.org/abs/cond-mat/0405189v1

Physica Status Solidi (b) 236, 494 (2003)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages summary of results for spin excitations in DE model with a few comments on associated electronic physics (from talk gi

Scientific paper

The physics of the ferromagnetic phase of the ``double exchange'' model has been widely discussed in the context of the CMR manganites. Usually, the double exchange ferromagnet is treated is classically, by mapping it onto an effective Heisenberg model. However this mapping does not permit a correct treatment of quantum or thermal fluctuation effects, and the results obtained lack many of the interesting features seen in experiments on the manganites. Here we outline a new analytic approach to systematically evaluating quantum and thermal corrections to the magnetic and electronic properties of the double exchange ferromagnet.

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