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Optical study of interactions in a d-electron Kondo lattice with ferromagnetism
K. S. Burch, A. Schafgans, N. P. Butch +5
We report on a comprehensive optical, transport and thermodynamic study of the Zintl compound YbMnSb, demonstrating that it is the first ferromagnetic Kondo lattice c…
Variable resistance at the boundary between semimetal and excitonic insulator
Massimo Rontani, L. J. Sham
We solve the two-band model for the transport across a junction between a semimetal and an excitonic insulator. We analyze the current in terms of two competing terms associated wi…
Coherent transport in homojunction between excitonic insulator and semimetal
Massimo Rontani, L. J. Sham
From the solution of a two-band model, we predict that the thermal and electrical transport across the junction of a semimetal and an excitonic insulator will exhibit high resistan…
Spin exchange in quantum rings and wires in the Wigner-crystal limit
Michael M. Fogler, Eugene Pivovarov
We present a controlled method for computing the exchange coupling in strongly correlated one-dimensional electron systems. It is based on the asymptotically exact relation between…
Breakdown of the Luttinger sum-rule at the Mott-Hubbard transition in the one-dimensional t1-t2 Hubbard model
Claudius Gros, Kay Hamacher, Wolfgang Wenzel
We investigate the momentum distribution function near the Mott-Hubbard transition in the one-dimensional t1-t2 Hubbard model (the zig-zag Hubbard chain), with the density-matrix r…