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Anti-Localisation to Strong Localisation: The Interplay of Magnetic Scattering and Structural Disorder
Sanjeev Kumar, Pinaki Majumdar
We study the effect of magnetic scattering on transport in a system with strong structural disorder, using exact finite size calculation of the low frequency optical conductivity.…
Inhomogeneous Ferromagnetism and Unconventional Charge Dynamics in Disordered Double Exchange Magnets
Sanjeev Kumar, Pinaki Majumdar
We solve the double exchange model in the presence of arbitrary substitutional disorder by using a self consistently generated effective Hamiltonian for the spin degrees of freedom…
Nanoscale Phase Coexistence and Percolative Quantum Transport
Sanjeev Kumar, Pinaki Majumdar
We study the nanoscale phase coexistence of ferromagnetic metallic (FMM) and antiferromagnetic insulating (AFI) regions by including the effect of AF superexchange and weak disorde…
Double Exchange Models: Self Consistent Renormalisation
Sanjeev Kumar, Pinaki Majumdar
We propose a scheme for constructing classical spin Hamiltonians from Hunds coupled spin-fermion models in the limit J_H/t \to \infinity. The strong coupling between fermions and t…