visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Chiral Magnetism: A Geometric Perspective

2023.04.04 08:21

admin 조회 수:207

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
524 2016-01-11 16:00  E6-2, #1323  Mott Physics in the Strong Spin-Orbit Coupling Regime
523 2016-11-11 16:00  #1323(E6-2. 1st fl.)  Dirac fermions in condensed matters
522 2019-06-28 14:00  E6-2, #1322  1st Research-exchange meeting of computational material physics file
521 2016-05-11 16:00  E6-2. #1323(1st fl.)  The quest for novel high-temperature superconductors---Prospects and progress in iridates
520 2018-02-12 15:00  #C303, (Creation Hall 3F, KAIST Munji Campus)  The recent result of XMASS Experiment
519 2022-09-30 16:00  E6-2. 1st fl. #1323 & Zoom  Spin-orbit torque-based spintronic devices file
518 2019-01-07 15:00  E6-2. 2st fl. #2501  Many-Body Invariants for Multipoles in Higher-Order Topological Insulators file
517 2024-01-25 16:00  CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus  [CAPP seminars] Detecting Gravitational Waves by Elecromagnetic Cavity
516 2016-10-18 13:30  1st fl. #1323(E6-2)  "Visualization of oxygen vacancy in motion and the interplay with electronic conduction"
515 2016-04-28 15:00  #2501(E6-2. 2nd fl.)  Lattice/Spin/Charge Coupling in 5d Pyrochlore Cd2Os2O7
514 2019-12-13 13:00  #2501, E6-2  Computational Material Designs: Current Status and Future Directions file
513 2023-11-09 16:00  E6-2(Natural Science B/D). 1st fl. #1323  Assessing the Capability of Near-Term Photonic Devices Towards Quantum Supremacy
512 2018-09-04 14:30  E6-2. 2st fl. #2502  Ultrafast time- and angle-resolved photoemission spectroscopy (tr-ARPES) with extreme ultraviolet laser pulses file
511 2016-04-08 16:00  E6-2. 5st fl. #1501  Spectroscopic studies of iron-based superconductors : what have we learned?
510 2023-07-26 10:00  CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus  [CAPP Seminar] Am Expansive Search for Dark Matter with ADMX and DM Radio
509 2016-10-07 16:00  E6-2. #1323(1st fl.)  “Tilt engineering of 4d and 5d transition metal oxides?”
508 2020-10-16 14:30  https://kaist.zoom.us/j/89198078609  Nanoscale magnetic resonance detection towards nano MRI file
507 2015-12-02 16:00  E6-2, #1323  Samarium Hexaboride: Is it a Topological insulator?
506 2020-10-16 16:00  https://kaist.zoom.us/j/89198078609  Hidden room-temperature ferroelectricity in CaTiO3 revealed by a metastable octahedral rotation pattern file
505 2015-11-19 16:00  E6-2, #1323  Emergent Collective Phenomena and Functions at Reduced Dimensions