visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Isostatic magnetism

2016.07.04 22:02

Physics 조회 수:8087

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[3] M. J. Lawler "Supersymmetry protected phases of isostatic lattices and kagome antiferromagnets", Unpublished, see arXiv:1510.03697.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)
215 2019-03-29 14:30    Epitaxial Multifunctional Oxide Thin Films for Novel Electronics file
214 2019-03-26 15:00    Consideration of thermal Hall effect in frustrated and un-frustrated quantum magnets file
213 2019-03-21 16:00    Spring 2019: Physics Seminar Serises file
212 2019-02-25 16:00    Spring 2019: Physics Colloquium file
211 2019-02-21 16:00    B-meson charged current anomalies - Theoretical status file
210 2019-01-23 16:00    Ultrasensitive Microwave Bolometer: Opportunity for Axion Detectors file
209 2019-01-09 16:00    Molecular Mott state in the deficient spinel GaV4S8 file
208 2019-01-07 15:00    Many-Body Invariants for Multipoles in Higher-Order Topological Insulators file
207 2018-12-27 16:00    Quantum Innovation (QuIN) Laboratory file
206 2018-12-26 16:00    Informal Workshop on Topology and Correlation file
205 2018-12-26 16:00    Brane-like defect in 3D toric code file
204 2018-12-16 16:00    Lectures on 2d Conformal Field Theory file
203 2018-12-11 16:00    Natural compact representation of Matsubara Green’s functions: applications to analytic continuation and quantum many-body simulations file
202 2018-12-07 16:00    Novel probes of interacting electrons in 2D systems file
201 2018-12-07 14:30    Spin generation from heat and light in metals file
200 2018-11-29 16:00    양자 칸델라 실현을 위한 단일 광자 발생장치 개발 file
199 2018-11-23 15:00    Entanglement string and Spin Liquid with Holographic duality file
198 2018-11-22 15:00    Experimental and Computational Study on Physical Properties based on Granular System file
197 2018-11-21 15:00    Engineering topological quantum physics at the atomic scale file
196 2018-11-09 16:00    Quantum sensing and imaging with diamond defect centers for nano-scale spin physics file