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: frumi@icts.resin
PROGRAM LINK: [ Ссылка ]
Table of Contents (powered by [ Ссылка ])
0:00:00 Introduction to Neutron Scattering (Tutorial)
0:00:32 Summary
0:01:36 Conventional Magnets
0:01:42 Conventional Antiferromagnets
0:03:31 Magnetic Excitations
0:04:45 Neutron Scatterings Concepts
0:04:54 Basic Properties of the Neutron
0:05:56 The Neutron - both wave and particle
0:08:32 The Neutron - Interactions with Matter
0:10:38 Sources of Neutrons
0:14:13 The Advantages of Neutrons
0:19:23 How Neutrons Probe
0:21:59 Scattered Neutrons - Basic Concepts
0:24:31 Scattering triangles - Elastic Scattering
0:29:39 Scattering triangles - Inelastic scattering
0:31:46 The Magnetic Cross-section
0:37:56 Neutron Scattering Techniques: Neutron Diffraction
0:38:10 Neutron Diffraction - Single-Crystal Diffractometer
0:41:42 Monochromator
0:43:49 Neutron Diffraction - Powders
0:47:46 Neutron Diffraction - Powders Diffractometer
0:49:15 Neutron Diffraction of SrCo2V2O8 TN=5.2K
0:51:17 Neutron Scattering Techniques: Inelastic Neutron Scattering
0:51:38 Inelastic Neutron Scattering - Triple Axis Spectrometer
0:54:40 Inelastic Neutron Scattering - Triple Axis
0:59:29 Inelastic Neutron Scattering - Time of Flight Spectrometer
1:03:50 Spin-Wave Excitations
1:04:01 Excitations in Condensed Matter
1:05:01 Spin-Waves
1:07:51 Spin-Waves in BaNi2V2O8
1:12:01 Quantum Magnets
1:12:05 The Origins of Quantum Magnetism
1:14:34 Quantum Magnetism - Low Spin Value
1:15:15 Antiferromagnetic Exchange Interactions
1:16:43 Low-Dimensional Interactions
1:17:30 Example One Dimensional Quantum Magnets
1:17:39 1D, S-1/2, Heisenberg, Antiferromagnet
1:18:21 Spinons Excitations
1:21:06 Solution of Bethe Ansatz
1:21:32 1D S-1/2 Heisenberg Antiferromagnetic - KCuF3
1:22:03 KCuF3 compared to Bethe Ansatz, 2 and 4 spinons
1:23:11 Frustrated magnets
1:23:34 Q&A
1:37:51 Wrap Up
