Dresden 2020 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 16: Poster Session Superconductivity, Cryogenic Particle Detectors, Cryotechnique

TT 16.19: Poster

Monday, March 16, 2020, 15:00–19:00, P2/EG

Exact Diagonalization study of large Hubbard clusters — •Michael Danilov¹, Sergei Iskakov², Andrei Bagrov³, Alexander Lichtenstein¹, and Mikhail Katsnelson³ — ¹I. Institut für Theoretische Physik, Jungiusstr. 9, 20355 Hamburg, Germany — ²Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA — ³Institute for Molecules and Materials, Radboud University, 6525AJ Nijmengen, The Netherlands

Using efficient exact diagonalization scheme, we study electronic structure of 4x4 doped Hubbard cluster with realistic hopping parameters including next nearest neighbour hopping t′ = −0.3t, which is optimal for superconducting cuprates.

To find possible candidates for superconducting regime we calculate the spectral function and network entanglement measures for different doping and Coulomb interaction.