81 citations · 255 across the 9 of their papers we have counts for
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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…
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…
Role of multiple subband renormalization in the electronic transport of correlated oxide superlattices
Andreas Ruegg, Manfred Sigrist
Metallic behavior of band-insulator/ Mott-insulator interfaces was observed in artificial perovskite superlattices such as in nanoscale SrTiO3/LaTiO3 multilayers. Applying a semicl…
Aspects of metallic low-temperature transport in Mott-insulator/ band-insulator superlattices: optical conductivity and thermoelectricity
Andreas Ruegg, Sebastian Pilgram, Manfred Sigrist
We investigate the low-temperature electrical and thermal transport properties in atomically precise metallic heterostructures involving strongly-correlated electron systems. The m…
Strongly renormalized quasi-two-dimensional electron gas in a heterostructure with correlation effects
Andreas Rüegg, Sebastian Pilgram, Manfred Sigrist
We present aspects of strong electron correlation in a model of a BI/M/BI heterostructure where BI is a band insulator and M can be tuned from a metal to a Mott insulator by varyin…