visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Isostatic magnetism

2016.07.04 22:02

Physics 조회 수:7935

날짜 2016-07-08 11:00 
연사  
장소 #1323(E6-2. 1st fl.) 

Isostatic magnetism

 

Jul. 08 (Fri.) 11:00 AM, #1323(E6-2. 1st fl.)
Dr. Michael Lawler(Binghampton Univ. / Cornell Univ.)

 

Abstract: Recently, a peculiar state of mechanical (phonon) systems, known as isostatic lattices, was both proposed[1] and fabricated as a metamaterial[2]. This state is on the brink of mechanical collapse and remarkably has special topological properties that guarantee the existence of soliton-like zero modes or edge modes with open boundary conditions. It is unlikely these topological phonons will be found in any solid state system since they are not on the brink of mechanical collapse. In this talk, I will discuss my group's research[3] into extending this physics to magnetic systems where ``mechanical collapse'' is replaced with the loss of magnetic order due to frustration.  I will prove mathematically that indeed an isostatic magnetic exists, a proof that remarkably employs a supersymmetry between magnons and an invented fermionic degree of freedom I have dubbed magninos. I will conclude with a discussion of the possibilities of finding an isostatic magnet among the kagome and distorted kagome families of antiferromagnets and the potential new phenomena that may be observed in such a material.


[1] C. L. Kane and T. C. Lubensky, "Topological boundary modes in isostatic lattices", Nature Physics 10, 39 (2013).
[2] B. G. Chen, N. Upadhyaya, V. Vitelli, "Non-linear conduction via solitons in a topological mechanical insulator", PNAS 111, 13004 (2014).
[3] M. J. Lawler "Supersymmetry protected phases of isostatic lattices and kagome antiferromagnets", Unpublished, see arXiv:1510.03697.


Contact: Eun Gook Moon, Physics Dept., (egmoon@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)
405 2023-08-24 11:00    Advancing magnonic metamaterials: spin waves in nanomagnetic arrays
404 2024-05-28 10:00    Mixed-State Quantum Spin Liquids and Dynamical Anyon Condensations in Kitaev Lindbladians
403 2019-11-28 16:00    Generation of coherent EUV emissions using ultrashort laser pulses file
402 2022-05-20 11:00    (응집물리 세미나) Exploration of new polymorphs in van der Waals crystals
401 2019-05-09 16:00    Quantum Optical Sensing Using Single Photons And Single Photon Emission from Single Emitters file
400 2019-05-09 16:00    Quantum Optical Sensing Using Single Photons And Single Photon Emission from Single Emitters file
399 2020-02-12 13:00    From inflation to new weak-scale file
398 2025-05-22 14:30  Prof. Keun Su Kim (The Univ. of Yonsei)  Sublattice-interference model for Fermi arcs in cuprates file
397 2018-10-24 10:30    Photonic integration of next-generation clocks and Hertz-absolute-accuarcy optical frequenncy synthesizers file
396 2018-06-14 10:00    Phonons and polariton-like particles in trapped ions for quantum computation and quantum simulation file
395 2018-12-16 16:00    Lectures on 2d Conformal Field Theory file
394 2023-11-22 16:00    [High Energy Theory Seminar] Renormalization and the Hierarchy Problem
393 2024-08-22 16:00    [CAPP seminar] Development of a 12-20 GHz CO Intensity Mapping Receiver for Capturing the Star-formation History in the Early Universe file
392 2022-12-20 16:00    Getting into Biology and Medicine as Physicist
391 2019-03-26 15:00    Consideration of thermal Hall effect in frustrated and un-frustrated quantum magnets file
390 2022-06-03 09:30    (Quantum-&Nano-Photonics Webinar) Seeing glass in a new light: reimagine chalcogenide photonics file
389 2018-10-11 16:00    Dirac electrons in a graphene quasicrystal file
388 2019-10-29 14:30    Quantum sensing file
387 2025-05-02 11:00  Prof. Joonho Jang  Anderson localization of electrons in a moire-of-moire lattice of helical twisted trilayer graphene file
386 2019-05-02 16:00    Anomalous optical properties of halide perovskites file