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Domain Formation and Orbital Ordering Transition in a Doped Jahn-Teller Insulator
Sanjeev Kumar, Arno P. Kampf, Pinaki Majumdar
The ground state of a double-exchange model for orbitally degenerate electrons with Jahn-Teller lattice coupling and weak disorder is found to be spatially inhomogeneous near…
Transport and Localisation in the Presence of Strong Structural and Spin Disorder
Sanjeev Kumar, Pinaki Majumdar
We study a tight binding model including both on site disorder and coupling of the electrons to randomly oriented magnetic moments. The transport properties are calculated via the…
Giant Tunneling Magnetoresistance, Glassiness, and the Energy Landscape at Nanoscale Cluster Coexistence
Sanjeev Kumar, Chandra Shekhar Mohapatra, Pinaki Majumdar
We present microscopic results on the giant tunneling magnetoresistance that arises from the nanoscale coexistence of ferromagnetic metallic (FMM) and antiferromagnetic insulating…
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.…