226 citations · 293 across the 4 of their papers we have counts for
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cond-mat.mtrl-sci2004
Doping and Field-Induced Insulator-Metal Transitions in Half-Doped Manganites
O. Cepas, H. R. Krishnamurthy, T. V. Ramakrishnan
We argue that many properties of the half-doped manganites may be understood in terms of a new two-(eg electron)-fluid description, which is energetically favorable at intermediate…
cond-mat.mtrl-sci2004
Modified Spin-Wave Theory for Nanomagnets : Application to the Keplerate Molecule Mo(72)Fe(30)
Olivier Cepas, Timothy Ziman
We adapt Takahashi's modified spin-wave theory to the context of nano-magnets, and apply it to the molecular compound based on the giant magnetic molecule Mo(72)Fe(30). This involv…
cond-mat.str-el2004
Theory of phonon-assisted "forbidden" optical transitions in spin-gapped systems
Olivier Cepas, Timothy Ziman
We consider the absorption of light with emission of one S(tot)=1 magnetic excitation in systems with a spin gap induced by quantum fluctuations. We argue that an electric dipole t…