Dresden 2017 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 31: Correlated Electrons: Other Materials
TT 31.5: Vortrag
Dienstag, 21. März 2017, 15:00–15:15, HSZ 103
Unconventional superconductivity in unconventional correlated materials? — •Xiaodong Cao1, Jean Chen1, Zhicheng Zhong1, Dirk Manske1, Thomas Ayral2, Olivier Parcollet2, and Philipp Hansmann1 — 1Heisenbergstrasse 1,D-70569 Stuttgart, — 2Institut de Physique Théorique (IPhT), CEA, CNRS, UMR 3681, 91191 Gif-sur-Yvette, France
Rare earth heavy fermion systems or transition metal oxides are probably among the first materials that come to mind when we consider unconventional superconductivity in strongly correlated materials. However, a much less known class of compounds, synthesized by the adsorption of a specific ad-atom species on a semiconductor substrate, have been recently confirmed as highly correlated systems. Depending on the specific ad-atom the materials span a rich variety of correlation physics including Mott insulating ground states or correlation driven charge order. With an effective Hamiltonian derived from ab initio methods, we adapt the dynamical-mean field theory, albeit including also non-local correlations on the level of the three legged electron boson vertex as recently proposed by Ayral and Parcollet. Studying the interplay of effects induced by long range interaction, geometric frustration, we started our search to novel exotic ground states. Interestingly, for the specific case of Pb/Si(111) preliminary results already suggest the presence of a d+id chiral superconductivity as a function of doping.