Скачать или смотреть Field-Tunable Toroidal Moment in a Chiral-Lattice Magnet by Harald O. Jeschke

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 Field-Tunable Toroidal Moment in a Chiral-Lattice Magnet
0:01:18 Acknowledgements
0:02:24 What is a toroidal moment?
0:04:08 How to switch a toroidal moment
0:05:53 Role of chirality
0:07:02 Toroidal moment and magnetic chirality of spin vortex configurations with 3-fold rotation symmetry
0:10:07 BaCoSiO4 crystal structure
0:13:15 BaCoSiO4 magnetic structure: the starting point
0:14:03 BaCoSiO4 electronic structure
0:15:36 Let's do some DFT energy mapping
0:17:21 Applications so far: DFT energy mapping induced change of perspective
0:19:48 What can DFT energy mapping tell us?
0:21:30 Another look at the magnetic pattern
0:23:37 Zero-field magnetic structure of BaCoSiO4
0:26:32 Finite field magnetic structure of BaCoSiO4
0:28:00 What is the mechanism of ferri- to ferrotoroidal transition
0:29:51 Theoretical modeling: out-of-plane DM interaction
0:31:58 What is special about BaCoSiO4?
0:32:48 Conclusions
0:33:20 Welcome to Research Institute for Interdisciplinary Science
0:34:00 Q&A
0:36:57 Field-induced ferri- to ferrotoroidal transition in BaCoSiO4
0:39:20 Another look at the magnetic pattern
0:43:30 Wrap Up