A theoretical condensed matter physicist who tested whether double exchange alone could explain transport in doped manganites. His 1995 collaboration showed that the spin-dependent hopping model failed to reproduce important features of measured electrical resistivity, and proposed a crucial role for the electron-phonon interaction. The work illustrates how solving a plausible model can reveal which physical ingredient it lacks.[ref]
Double Exchange Alone Does Not Explain the Resistivity of La1-xSrxMnO3 by A. J. Millis and others. Abstract: comparison with resistivity data and proposed lattice coupling
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