visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2023-01-12 16:00 
연사  
장소 E6-2 #1323 

물리학과 이경진 교수님 연구실에서 아래와 같이 세미나를 개최합니다.

구성원 여러분들의 많은 관심과 참여 부탁 드립니다. 

 

* Title: Spin wavepackets in the Kagome ferromagnet Fe3Sn2: propagation and precursors

 

* Speaker: Changmin Lee (Lawrence Berkeley National Laboratory)

 

* Date: 4pm, 12th January 2023

 

* Place: E6-2 1323

 

Abstract:

The propagation of spin waves in magnetically ordered systems has emerged as a potential means to shuttle quantum information over large distances. Conventionally, the arrival time of a spin wavepacket at a distance, d, is assumed to be determined by its group velocity, vg. He we report time-resolved optical measurements of wavepacket propagation in the Kagome ferromagnet Fe3Sn2 that demonstrate the arrival of spin information at times significantly less than d/vg. We show that this spin wave "precursor" originates from the interaction of light with the unusual spectrum of magnetostatic modes in Fe3Sn2 [1]. Related effects may have far-reaching consequences toward realizing long-range, ultrafast spin wave transport in both ferromagnetic and antiferromagnetic systems.

 

[1] C. Lee et al., arXiv:2212.02498 (2022)

 

Contact: Kyung Jin Lee (kjlee@kaist.ac.kr) 

번호 날짜 연사 제목
공지 2025-02-24 16:00    2025년 봄학기 콜로키움 안내
공지 2025-02-27 16:00    2025년 봄 물리학과 특별세미나 (광학/응집물리 분야)
595 2015-07-16 16:00    KAIST Physics Distinguished Lecture
594 2015-07-16 16:00    Next-generation ultrafast laser technology for nonlinear optics and strong-field physics
593 2015-07-23 13:30    Enhanced ZnO based UV photonics and related applications file
592 2015-08-03 10:30    Axion Search
591 2015-08-04 11:00    Propagation of ultrasound through two- and three-dimensional strongly scattering media
590 2015-09-07 15:00    Advanced Optical Materials and Devices at NRL
589 2015-09-07 16:00    Physics Colloquium : 2015 Fall file
588 2015-09-14 14:00    Ultrafast X-ray Studies on Dynamics Matter in Extreme Conditions
587 2015-09-15 16:00    Physics Colloquium : 2014 Fall file
586 2015-10-14 18:00    인터스텔라 영화 속의 물리 file
585 2015-10-15 10:00    Development of Large-Bore, High Field Magnets at the NHMFL
584 2015-10-16 15:00    High Magnetic Fields to Probe the sub-eV range of Particle/Astroparticle Physics - From the OSQAR experiments at CERN up to new perspectives at LNCMI-Grenoble
583 2015-10-16 16:00    Fluctuations of entropy production in partially masked electric circuits
582 2015-10-23 10:30    How to write a good scientific paper[Open lecture series]
581 2015-10-23 15:00    Development of a Rogowski Coil as a new beam position monitor
580 2015-11-06 16:30    Topological Dirac line nodes in centrosymmetric semimetals
579 2015-11-10 16:00    Rapid heating of matter using high power lasers
578 2015-11-19 16:00    Emergent Collective Phenomena and Functions at Reduced Dimensions
577 2015-11-23 13:30    What's Beyond the Standard Model? Lessons from Run I and what might come in Run II
576 2015-11-24 16:00    Topology-based understanding of spin dynamics in inhomogeneously magnetized systems