81 citations · 255 across the 9 of their papers we have counts for
9 papers
A comparative DMFT study of the eg-orbital Hubbard model in thin films
Andreas Rüegg, Hsiang-Hsuan Hung, Emanuel Gull +1
Heterostructures of transition-metal oxides emerged as a new route to engineer electronic systems with desired functionalities. Motivated by these developments, we study a two-orbi…
Chiral Bosonic Mott Insulator on the Frustrated Triangular Lattice
Michael P. Zaletel, S. A. Parameswaran, Andreas Rüegg +1
We study the superfluid and insulating phases of interacting bosons on the triangular lattice with an inverted dispersion, corresponding to frustrated hopping between sites. The re…
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…
Sum rule violation in self-consistent hybridization expansions
Andreas Rüegg, Emanuel Gull, Gregory A. Fiete +1
We show that for multi-orbital quantum impurity models the non-crossing approximation and one-crossing approximation versions of the self-consistent hybridization expansions violat…
Topological phases in layered pyrochlore oxide thin films along the [111] direction
Xiang Hu, Andreas Rüegg, Gregory A. Fiete
We theoretically study a multi-band Hubbard model of pyrochlore oxides of the form ABO, where B is a heavy transition metal ion with strong spin-orbit coupling, in a th…
Z_2-slave-spin theory for strongly correlated fermions
A. Rüegg, S. D. Huber, M. Sigrist
We review a representation of Hubbard-like models that is based on auxiliary pseudospin variables. These pseudospins refer to the local charge modulo two in the original model and…