Kagome Metals by Ronny Thomale

PROGRAM
FRUSTRATED METALS AND INSULATORS (HYBRID)

ORGANIZERS: Federico Becca (University of Trieste, Italy), Subhro Bhattacharjee (ICTS-TIFR, India), Yasir Iqbal (IIT Madras, India), Bella Lake (Helmholtz-Zentrum Berlin für Materialien und Energie, Germany), Yogesh Singh (IISER Mohali, India) and Ronny Thomale (Julius-Maximilians-Universität at Würzburg, Germany)
DATE: 05 September 2022 to 16 September 2022
VENUE: Ramanujan Lecture Hall and Online

Frustration, i.e., the intertwining of competing physical state formation tendencies, is a ubiquitous theme in contemporary condensed matter physics. While certain domains such as frustrated magnetism are more established than others, the perspective of frustration applied to correlated electron systems promises to deepen and elevate understanding of a broad set of principles such as competing orders, quantum state entanglement, and criticality. While a Mott state is often rather canonically reconciled from the viewpoint of frustration, itinerant electron systems can likewise exhibit similar features that are intimately connected to the symmetry and topology of a metal or band insulator. Our ICTS workshop “Frustrated Metals and Insulators” aims at bringing together a diverse community of condensed matter researchers to push the state of the art and extend understanding towards a synergetic foundation of frustration phenomena in metals as well as insulators. The workshop intends to facilitate the development of analytical and numerical methods to address aspects of frustration in electronic systems, and to intensify the dialogue between theoretical conceptualization and experimental realization. It will consist of a series of talks from a selective group of international experts in the fields of frustrated magnetism, superconductivity and topological states of matter. The talk format and the topical arrangement is aimed at encouraging in-depth discussions across all subareas of frustrated electron systems, and as such to enable new collaborative activities between the participants.

ICTS is committed to building an environment that is inclusive, non discriminatory and welcoming of diverse individuals. We especially encourage the participation of women and other under-represented groups.

We gratefully acknowledge ct.qmat support.

CONTACT US: [email protected]

PROGRAM LINK: https://www.icts.res.in/program/frumi...

Table of Contents (powered by https://videoken.com)
0:00:00 Start
0:00:10 Kagome metals
0:00:48 Outline
0:01:42 "Old times": Frustrated kagome magnets
0:03:44 Magnetic kagome metals
0:06:08 Vanadium kagome nets: AV3Sb5
0:10:03 A step back: kagome Fermiology
0:12:43 Superconductivity at weak coupling
0:12:47 Sublattice interference
0:17:00 Kagome vs. Honeycomb around van Hove filling
0:18:04 Functional renormalization group
0:18:27 Phase diagram around van Hove filling
0:20:43 Charge and spin bond order
0:23:17 Two-dimensional d-wave Pomeranchuk instability
0:25:03 Topographic imaging
0:25:50 Charge modulation from spectroscopic imaging
0:27:36 Multi-orbital kagome Fermiology
0:28:37 CDW order from L=I Peierls instability
0:30:03 Superconductivity in AV3Sb5
0:33:19 Ga/Sc-Herbertsmithite
0:34:25 Fine structure constant and Reynolds number
0:35:24 AdS/CFT vs Boltzmann hydrodynamics
0:36:33 Outlook: kagome metal paradigm
0:37:00 Research team and references
0:40:23 A step back: kagome Fermiology
0:43:06 Q&A