Allgemein

In 2018 we predicted chiral d-wave superconductivity in adatom lattices of Sn:Si(111) and Pb:Si(111) (Cao et al. 2018). Two years later that superconductivity was found (Wu et al. 2020) and in 2023 the chiral d-wave symmetry was confirmed (Ming et al. 2023). We continued the search for further pr...

Join the frontier of condensed matter research and tackle the “mother of all models”. The Hubbard model in 2 and larger dimensions is an unsolved paradigm of modern condensed matter physics and believed to hold the key for understanding emergent phenomena like  high-temperature superconductivity, qu...

Yorick L. A. Schmerwitz, Louis Thirion, Gianluca Levi, Elvar Ö. Jónsson, Pavlo Bilous, Hannes Jónsson, and Philipp Hansmann We apply a recently proposed computational protocol for a neural-network-supported configuration interaction calculation to the paradigmatic N2 molecule. By comparison of corr...

Pavlo Bilous, Louis Thirion, Henri Menke, Maurits W. Haverkort, Adriana Pálffy, Philipp Hansmann A deep-learning approach to optimize the selection of Slater determinants in configuration interaction calculations for condensed-matter quantum many-body systems is developed. We exemplify our algorith...

Pascal Puphal, Pascal Reiss, Niklas Enderlein, Yu-Mi Wu, Giniyat Khaliullin, Vignesh Sundaramurthy, Tim Priessnitz, Manuel Knauft, Lea Richter, Masahiko Isobe, Peter A. van Aken, Hidenori Takagi, Bernhard Keimer, Y. Eren Suyolcu, Björn Wehinger, Philipp Hansmann, Matthias Hepting The discovery of h...

Niklas Wagner, Lorenzo Crippa, Adriano Amaricci, Philipp Hansmann, Marcel Klett, Elio König, Thomas Schäfer, Domenico Di Sante, Jennifer Cano, Andrew Millis, Antoine Georges, Giorgio Sangiovanni The topological classification of electronic band structures is based on symmetry properties of ...

Yi-Ting Tseng, M. O. Malcolms, Henri Menke, Marcel Klett, Thomas Schäfer, and P. Hansmann We compare the dynamical mean-field descriptions of the single-band Hubbard model and the three-band Emery model at the one- and two-particle level for parameters relevant to high-Tc superconductors. We show...

The unconventional superconductor Sr2RuO4 has long served as a benchmark for theories of correlated-electron materials. The determination of the superconducting pairing mechanism requires detailed experimental information on collective bosonic excitations as potential mediators of Cooper pairing. We...

In 2018 we predicted chiral d-wave superconductivity in hole-doped X:Si(111) (X=Sn,Pb) ad-atom systems (see Figure). Now - 5 years later - experimentalists confirm our prediction in boron doped Sn:Si(111) in a Nature physics article.

Stefan Käser, et al. We study the superconducting gap function of Sr2RuO4. By solving the linearized Eliashberg equation with a correlated pairing vertex extracted from a dynamical mean-field calculation we identify the dominant pairing channels. An analysis of the candidate gap functions in orbita...