Explore the fundamentals of frustrated magnets in this comprehensive 56-minute lecture by Yogesh Singh from the International Centre for Theoretical Sciences. Delve into the world of quantum magnetism, covering topics from basic concepts to advanced experimental findings. Learn about the interplay between quantum fluctuations and competing interactions in frustrated quantum magnets, and their potential for exploring unconventional phases of condensed matter. Discover the journey from materials to models, using La2CuO4 as a case study, and understand key concepts such as the Mott-Hubbard insulator and the Heisenberg model. Examine various frustrated lattices, including the Shastry-Sutherland lattice and Kagome structures, and their experimental signatures. Gain insights into quantum spin liquids, valence bond states, and novel frustration mechanisms. This lecture, part of the 2nd Asia Pacific Workshop on Quantum Magnetism, offers a rich blend of theoretical understanding and experimental observations in the field of frustrated magnets.
Overview Lecture on Basics of Frustrated Magnets - Experimental by Yogesh Singh
International Centre for Theoretical Sciences via YouTube
Overview
Syllabus
Overview Lecture on Basics of Frustrated Magnets: Experimental-1
Where to look for Magnetism
Materials to Models: A case study of La2 CuO4
Splitting of d-orbitals in an octahedral crystal field
Materials to Models: A case study of La, CuO4
The Mott Hubbard insulator
Materials to Models: A case study of La, Cuo
Effective Theory: Heisenberg Model
Square lattice antiferromagnet
Broken Symmetry, Order Parameter
Excitations of the Antiferomagnet
Confinement
Conventional Magnets
Geometrically Frustrated Magnets
Geometric Magnetic Frustration
Consequences of Frustration
Excitations in spin liquids: Fractional Deconfined Particles
Quantum Spin Liquids
Valence Bond States
Experimental Signatures for Spin Liquids
Frustrated lattices: examples
Shastry-Sutherland Lattice
Triangular Lattice Organics
K-ET : Heat Capacity + Thermal Conductivity
dmit: Heat Capacity + Thermal Conductivity
Kagome : Herbertsmithite + others
Hyper-Kagome : Na4lr308
Na4lr308 : Resistivity
Nadir308 : Magnetic and Thermal Properties
NaAll308 : Inhomogeneous Frozen state revealed by musk and NMR
Kagome bi-layer QSL Ca1Cr,028
Route to the Material Ca1Cr,928
Route to the Material Ca10Cr7O28
Gapless Spin Liquid State in Ca10Cr7O28
Magnetic Interactions : Novel Frustration Mechanism
Summary
Taught by
International Centre for Theoretical Sciences
