visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Chiral Magnetism: A Geometric Perspective

2023.04.04 08:21

admin 조회 수:499

날짜 2023-04-04 16:00 
일시 16:00 on Apr 4, 2023 
장소 Room 2501, KAIST Natural Sciences Lecture Hall(E6) 
연사 Dr. Daniel Mark Hill (University Of Missouri) 
University Of Missouri소속 Daniel Mark Hill 박사님을 모시고 'Chiral Magnetism: A Geometric Perspective' 주제에 대한 세미나를
개최합니다. 물리학과 구성원 여러분들의 많은 참여 부탁드립니다.
 
1) Time :  at 16:00 on Apr 4, 2023 
2) Venue :  Room 2501, KAIST Natural Sciences Lecture Hall(E6) (자연과학동 2501호)  
3) Speaker : Dr. Daniel Mark Hill (University Of Missouri) 
4) Talk Title : Chiral Magnetism: A Geometric Perspective 
 5) Abstract
     We recast the model of a chiral ferromagnet with the Dzyaloshinski-Moriya interaction as a Heisenberg model with nontrivial spin parallel transport [1]. Within this theoretical framework, the Dzyaloshinskii-Moriya vectors take the role of a background SO(3) gauge field. A combination of analytical and numerical arguments suggests that the ground state of this gauged Heisenberg model in 2 spatial dimensions is a hexagonal skyrmion crystal in a wide range of applied magnetic fields. We also illustrate the usefulness of this geometric perspective in the context of Hubbard models with spin orbit coupling by computing phase diagram symmtries of lattices with D3 symmetry [2]. The geometric perspective is not a new idea, being introduced as far back as 1978 by Dzyaloshinskii [3], but we find that it is highly underutilized in the literature and would often facilitate a better understanding of the physics if implemented.
 
[1] Daniel Hill, Valeriy Slastikov, Oleg Tchernyshyov, SciPost Phys. 10, 078 (2021)
[2] Daniel Hill, Justin Shotton, and Carsten A. Ullrich, Phys. Rev. B 107, 115134 (2023)
[3] Dzyaloshinskii and Volovik, J.Phys. (Paris) 39, 693 (1978)
번호 날짜 장소 제목
462 2016-10-27 16:00  #1323(E6-2)  Terahertz Metal Optics
461 2016-11-01 14:30  Seminar Room #1323(E6-2)  Search for dark sector particles in the B-factory experiments
460 2016-11-04 13:30  E6-2. #1323(1st fl.)  Exotic phenomena at oxide LaAlO3/SrTiO3 hetero-interface and their applications
459 2016-11-04 15:00  E6-2. #1323(1st fl.)  Quantum information experiments using few electron spins in semiconductors
458 2016-11-1 10:30  #1323(E6-2 1st fl.)  Time scale dependent dynamics in InAs/InP quantum dot gain media
457 2016-11-10 16:00  E6-2. #1323(1st fl.)  Low Dimensional Active Plasmonics and Electron Optics in Graphene
456 2016-11-11 13:30  #1323(E6-2. 1st fl.)  Bandgap Engineering of Black Phosphorus
455 2016-11-11 16:00  #1323(E6-2. 1st fl.)  Dirac fermions in condensed matters
454 2016-11-16 16:00  #1323(E6-2. 1st fl.)  Realizing Haldane Model in Fe-based Honeycomb Ferromagnetic Insulators
453 2016-11-18 10:30  #5318(5th fl.)  Non-equilibrium many-body spin dynamics in diamond
452 2016-11-24 16:00  #1323(E6-2. 1st fl.)  Harmonic oscillator physics with single atoms in a state-selective optical potential
451 2016-11-29 16:00  #1323(E6-2. 1st fl.)  Symmetry Protected Kondo Metals and Their Phase Transitions
450 2016-12-09 13:30  #1323(E6-2. 1st fl.)  Entanglement area law in strongly-correlated systems
449 2016-12-09 16:00  #1323(E6-2. 1st fl.  Shift Charge and Spin Photocurrents in Dirac Surface States of Topological Insulator
448 2016-12-12 13:30  1:30p.m. #1323(E6-2. 1st fl.)  “Possible symmetry in the phase diagrams of electron- & hole-doped cuprate high-Tc superconductors”
447 2016-12-8 16:00  #1323(E6-2. 1st fl.)  Dynamical Resonance between Two Optical Cavities via Optomechanical Oscillator
446 2017-01-09 16:00  Lecture Hall, College of Natural Sciences [#1501,E6-2]  Topological Defects and Phase Transitions" file
445 2017-02-01 14:00  #1323(E6-2. 1st fl.)  Quantum electron optics using flying electrons
444 2017-03-02 16:00  #1323(E6-2. 1st fl.)  “Progress in the comparison of ARPES to DMFT for d and f strongly correlated electron systems”
443 2017-03-06 16:00  Seminar Room 1501  Spring 2017: Physics Colloquium file