visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Chiral Magnetism: A Geometric Perspective

2023.04.04 08:21

admin 조회 수:502

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
554 2017-07-10 16:00  Jul. 10th (Mon), 4pm  “Intertwined Orders in a Heavy-fermion metal” file
553 2019-03-21 16:00  RM. 1323, E6-2  Spring 2019: Physics Seminar Serises file
552 2019-09-18 16:00  Seminar Room #1323  Fall 2019: Physics Seminar Serises file
551 2019-09-02 16:00  Seminar Room 1501  Fall 2019: Physics Colloquium file
550 2022-03-29 10:00  E6 #1501/zoom, E6 #2502/zoom  Non-reciprocal phase transitions file
549 2022-03-31 10:00  E6 #1501/zoom  Weiss fields for Quantum Spin Dynamics file
548 2024-10-17 16:00  온라인 (https://kaist.zoom.us/j/89289652931?pwd=eNz6xnTFrEMGXYj9fXpdBJsW9fEpJX.1)  Photonic Methods for Quantum Levitodynamics Beyond the Rayleigh Regime
547 2024-08-16 11:00  E6 1322 (no zoom broadcasting)  Cathodoluminescence for nanophotonics: Applications to plasmonic bandgap materials and perovskite semiconductors file
546 2023-09-18 11:00  E6-2, #1322  Magic polarisation trapping of polar molecules for tunable dipolar interactions file
» 2023-04-04 16:00  Room 2501, KAIST Natural Sciences Lecture Hall(E6)  Chiral Magnetism: A Geometric Perspective
544 2023-11-15 16:00  E6-6, #119  Quantum hydrodynamic theory for plasmonics: from molecule-coupling to nonlinear optics
543 2022-02-28 16:00  E6, #1501  Spin-based training of optical microscopes
542 2009-02-23 16:00  E6, 1501  Physics Colloquium : 2009 Spring file
541 2009-09-07 16:00  E6, 1501  Physics Colloquium : 2009 Fall file
540 2009-10-21 16:00  E6, 1501  Interdimensional Universality of Dynamic Interfaces
539 2010-02-08 16:00  E6, 1501  Physics Ciolloquium : 2010 Spring file
538 2010-02-14 16:00  E6, 1501  Physics Colloquium - 2011 Spring file
537 2010-09-06 16:00  E6, 1501  Physics Colloquium : 2010 Fall file
536 2011-05-16 16:00  E6, 1501  Photonics with surface plasmon polaritons
535 2011-09-03 16:00  E6, 1501  Physics Colloquium : 2011 Fall file