<aside> 💡 Bio: Johannes Mitscherling obtained his PhD 2021 at the Max Planck Institute for Solid State Research in Stuttgart, Germany, under supervision of Walter Metzner. In his PhD he studied virtual interband effects for electrical transport phenomena in cuprates and topological materials. He then joined the group of Joel Moore at Berkeley in 2022 with a Leopoldina Postdoctoral Fellowship. He is interested in quantum geometry with a strong focus on flat band materials, interaction and disorder effects.
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Google Scholar - Has pic of speaker
Date: 10/06/2023
Time: 3:15 pm - 4:15 pm
Location: Westside Research Park (WRP), in room B279 on the second floor of the Genomics Institute suite.
Address: 2300 Delaware Ave, Santa Cruz, CA 95060 (← click link)
https://www.google.com/maps/embed?pb=!1m14!1m8!1m3!1d12752.947313429599!2d-122.0587269!3d36.9564003!3m2!1i1024!2i768!4f13.1!3m3!1m2!1s0x808e6b8ba63ef30d%3A0xa3feb2009bd75201!2sUCSC Westside Research Park!5e0!3m2!1sen!2sus!4v1696459010296!5m2!1sen!2sus
<aside> <img src="/icons/forward_yellow.svg" alt="/icons/forward_yellow.svg" width="40px" /> Abstract Fundamental for the understanding of any quantum material is the characterization of the ground state and its excitations. Until recently, this mostly meant studying dispersive features and the topology of the band structure. In this talk, I will give an introduction to quantum geometry, an emerging field of study with remarkable power: In contrast to topology, which captures the global properties of a collection of wave functions, the quantum geometry characterizes their parameter-local properties. By exploring the electrical conductivity of non-interacting multiband systems, I will show how quantum geometry naturally arises in the description of interband contributions to transport. I will explore the role of the quantum metric, a distance measure between Bloch wave functions, and its importance in flat-band systems, where a non-trivial quantum metric indicates the possibility of finite electrical dc conductivity despite a vanishing quasiparticle velocity. Going beyond this particular example, I will discuss fundamental properties of quantum geometric quantities and highlight some other observables, where the importance of quantum geometry has been identified recently. In light of its broad applicability, I will close by proposing quantum geometry as a standard tool to characterize and design promising systems with interesting wave function phenomena.
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High-temerature superconductors
Quantum Geometry
Low-dimensional materials
Non-Hermitian band topology
Quantum Transport