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Twisted Bilayer Magnets

2022.08.04 15:21

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날짜 2022-08-12 10:00 
일시 Aug.12(Fri.) 10:00AM, 2022 
장소 E6-1 #1323 
연사 Dr. Moon Jip Park (Center for Theoretical Physics of Complex Systems, IBS) 
1. Date / Time 
    - August 12, 2022 / 10:00 AM (KST)
 
2. Place / ZOOM 
    Room 1323, KAIST Natural Sciences Lecture Hall(E6) (자연과학동 1323호)
 
3. Speaker
    Dr. Moon Jip Park (Center for Theoretical Physics of Complex Systems, IBS)
 
4. Talk Title
    Twisted Bilayer Magnets 
 
5. Abstract
    Recent experiments with twisted bilayer materials have provided a versatile platform for the realization of exotic phases of matter. In this talk, we are going to expand the theory of moire systems to spin systems. Starting from the brief review of twisted bilayer graphene, we develop a concrete theory of twisted bilayer magnetism. Based on the first-principles calculations of two-dimensional honeycomb magnet CrI3, we construct the generic spin models that represent a broad class of twisted bilayer magnetic systems. Using the Monte-Carlo method, we discover a variety of non-collinear magnetic order that has been overlooked in previous theoretical and experimental studies. Finally, we show that the twisted magnets can be a promising candidate for the discovery of topological magnon excitations.
 
 
Inquiry: Dept. Physics  Prof.  Kim, Se Kwon(T. 2527, sekwonkim@kaist.ac.kr )
 
Attachment : CV
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371 2018-12-11 16:00  E6-2. 1st fl. #1323  Natural compact representation of Matsubara Green’s functions: applications to analytic continuation and quantum many-body simulations file
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368 2018-12-26 16:00  E6-2. 1st fl. #1323  Brane-like defect in 3D toric code file
367 2018-12-27 16:00  E6-2. 1st fl. #1323  Quantum Innovation (QuIN) Laboratory file
366 2019-01-07 15:00  E6-2. 2st fl. #2501  Many-Body Invariants for Multipoles in Higher-Order Topological Insulators file
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362 2019-02-25 16:00  Rm. 1501 (E6)  Spring 2019: Physics Colloquium file
361 2019-03-21 16:00  RM. 1323, E6-2  Spring 2019: Physics Seminar Serises file
360 2019-03-26 15:00  E6-2. 2st fl. #2501  Consideration of thermal Hall effect in frustrated and un-frustrated quantum magnets file
359 2019-03-29 14:30  E6-2. 1st fl. #1323  Epitaxial Multifunctional Oxide Thin Films for Novel Electronics file
358 2019-03-29 16:00  E6-2. 1st fl. #1323  Coherent Quantum Control and Magnetism on atoms – Trapped ion and ESR STM file
357 2019-04-04 16:00  #1323, E6-2  Chiral spin-photon interaction at nanoscale file
356 2019-04-11 16:00  #1323, E6-2  Massive screening for cathode active materials using deep neural network file
355 2019-04-19 11:00  #1323, E6-2  First-principles studies of semiconductors for solar cell applications file
354 2019-04-19 14:30  E6-2. 1st fl. #1323  A family of finite-temperature electronic phase transitions in graphene multilayers file