26. Deutsche Physikerinnentagung 2022 (German Conference of Women in Physics)

Session

Physics Talks - Solid State Theory

5

Nov 25, 2022, 9:00 AM

401 (KIT Campus North)

66. Building Blocks for Cluster Mott Insulators

Vaishnavi Jayakumar (Insitute for Theoretical Physics, University of Cologne, Germany)

11/25/22, 9:00 AM

Physics talks

Talk

The Hubbard model provides a playground for investigating the physics of a wide range of strongly correlated systems. An important feature of these systems is the Mott insulator phase, where at half-filling, an electron gets localised on a single lattice site. In this work, we extend the idea to cluster Mott insulators-- where an electron is now localised on clusters of sites. To that end, we...

68. Magnetic states and high-pressure enthalpy landscape of manganese sulfide polymorphs: a first-principles study

Prof. Maribel Núñez-Valdez (Helmholtz Zentrum Potsdam (GFZ)/Goethe University Frankfurt am Main)

11/25/22, 9:15 AM

Physics talks

Talk

We combine density functional theory (DFT) with special quasirandom structures (QRS) and occupation control matrix (OCM) methods to investigate the magnetic ordering and pressure effects on manganese sulfide polymorphs. MnS is usually found in paramagnetic (PM) rock-salt (RS) structure under ambient conditions, but it becomes antiferromagnetic (AFM) as temperature decreases at constant...

75. Analogues of light and gravity in the collective excitations of quantum magnets

Ms Leilee Chojnacki (OIST)

11/25/22, 9:30 AM

Physics talks

Talk

Condensed matter systems can possess striking parallels with gauge theories that arise in the context of high-energy physics, exemplified by the Anderson-Higgs transition in superconductors [1], and emergent photons [2] and magnetic monopoles [3] in spin ice. Such examples raise the question of where else there is potential for low-energy experiments to inform physics relevant to high-energy...

132. Quantum critical Eliashberg theory in a finite dimensional SYK model

Veronika Stangier (KITI)

11/25/22, 9:45 AM

Physics talks

Talk

We present a model of superconductivity in a higher dimensional generalization of the Sachdev-Ye-Kitaev model. In the normal state this model features a critical phase in (1+1) dimensions and a quantum phase transition in (2+1) dimensions. For (2+1) dimensions the superconductivity emerges around the quantum critical point. We derive the Eliashberg equations of superconductivity from the...

134. Influence of Coulomb correlations on high harmonic generation in monolayer TMDC materials

Josefine Neuhaus

11/25/22, 10:00 AM

Physics talks

Talk

The nonlinear optical phenomenon of high harmonic generation (HHG) in solid state materials was employed to study different properties of these materials. In a wide range of semiconducting materials, HHG can be induced by off-resonant excitation with ultrashort strong-files pulses in the THz- and mid-IR-range. The study of HHG in TMDC materials has been shown to be particulary interesting due...