Strain Fields and Critical Phenomena in Manganites I: Spin-Lattice Hamiltonians

Abstract

We use a model Hamiltonian to study critical phenomena in manganites. This Hamiltonian includes long-range strain interactions, and a coupling between the magnetic order parameter and the strain field. We perform a perturbative renormalization group (RG) analysis and calculate the static critical exponents, correct to the one-loop level. We compare our RG results with many experiments on doped manganite critical systems. Our theory is in excellent agreement with the experimental values for the critical exponents.

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Cited by in corpus (1)

• Hidden superuniversality in systems with continuous variation of critical exponents