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Topological invariants, surface states, and interaction-driven phase transitions in correlated Kondo insulators with cubic symmetry
Markus Legner, Andreas Rüegg, Manfred Sigrist
We construct a lattice model for a cubic Kondo insulator consisting of one spin-degenerate and orbital at each lattice site. The odd-parity hybridization between the two or…
Study of interface phenomena in a topological-insulator/Mott-insulator heterostructure
Suguru Ueda, Norio Kawakami, Manfred Sigrist
We theoretically investigate a two-dimensional heterostructure composed of a topological insulator (TI) and a Mott insulator (MI), and clarify what kind of electronic states can be…
Thermoelectric Effect of Correlated Metals - Band Structure Effects and the Breakdown of Mott's Formula
Jonathan M. Buhmann, Manfred Sigrist
We study the thermoelectric effect of two-dimensional metals on a square lattice within semiclassical Boltzmann transport theory with particular focus on electron-electron scatteri…
Proximity effects in a topological-insulator/Mott-insulator heterostructure
Suguru Ueda, Norio Kawakami, Manfred Sigrist
We investigate proximity effects in a correlated heterostructure of a two-dimensional Mott insulator (MI) and a topological insulator (TI) by employing inhomogeneous dynamical mean…
Reply to "Comment on 'Z2-slave-spin theory for strongly correlated fermions' "
Andreas Rüegg, Sebastian D. Huber, Manfred Sigrist
We show that the physical subspace in the Z2-slave-spin theory is conserved under the time evolution of the system. Thus, when restricted to the physical subspace, this representat…