|장소||#1323(E6-2. 1st fl.)|
|일시||Jul. 08 (Fri.) 11:00 AM|
|연사||Dr. Michael Lawler(Binghampton Univ. / Cornell Univ.)|
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 and fabricated as a metamaterial. 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 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.
 C. L. Kane and T. C. Lubensky, "Topological boundary modes in isostatic lattices", Nature Physics 10, 39 (2013).
 B. G. Chen, N. Upadhyaya, V. Vitelli, "Non-linear conduction via solitons in a topological mechanical insulator", PNAS 111, 13004 (2014).
 M. J. Lawler "Supersymmetry protected phases of isostatic lattices and kagome antiferromagnets", Unpublished, see arXiv:1510.03697.
Contact: Eun Gook Moon, Physics Dept., (email@example.com)
|공지||Sep.22 2022||E6-1 #1323||2022 가을학기 응집물리 및 광학 세미나 전체 일정|
|156||Oct 23 (Fri.), 14:00 PM||E6-2 #1323||Prof. Ivan Savenko (University of Science and Technology & IBS PCS)||Plasmon spectroscopy of low-dimensional superconductors in fluctuating regime|
|155||May 29 (Tue.), 04:00 PM||#1323, E6-2||Prof. Jae-Won Jang||Investigation on metal nanostructure/semiconductor junction and its applications|
|154||November 7 (Thu.), 16:00 PM||#1323, E6-2||Prof. Je-Hyung Kim||Integrated quantum photonics with solid-state quantum emitters|
|153||Dec. 15 (Fri.), 9:20 AM||E6-2, Lecture Room #1323||Prof. Jhinhwan Lee 외 9명||Workshop on Magnetism in Unconventional Superconductors 개최|
|152||November 14 (Thu.), 16:00 PM||#1323, E6-2||Prof. Ji-Hun Kang||Semi-classical model of polariton propagation|
|151||July 21, 2022 (Thu) 4:00 PM(KST)||CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus||Prof. Jihn E. Kim (Kyoung Hee University)||Quintessential axions|
|150||April 23 (Tue.), 4:00 PM||#1323, E6-2||Prof. Johan Chang||From Mott physics to high-temperature superconductivity|
|149||Jul. 28 (Thu.) 4PM||#1323(E6-2. 1st fl.)||Prof. Johannes Pollanen, Jerry Cowen Chair of Experimental Physics at Michigan State University||Low Dimensional Electrons: On the Road to Hybrid Quantum Systems|
|148||2017.1.9(Mon), 4PM||Lecture Hall, College of Natural Sciences [#1501,E6-2]||Prof. John Michael Kosterlitz, Brown University||Topological Defects and Phase Transitions"|
|147||May 9 (Wed.), 04:00 PM||#1323, E6-2||Prof. Jong-Soo Rhyee||Recent advances in thermoelectric bulk composites|
|146||October 18 (Thu.), 16:00 PM||#1323, E6-2||Prof. Jongseok Lee||Applications of nonlinear optics for condensed matter researches|
|145||September 20 (Thu.), 16:00||#1323, E6-2||Prof. Joo-Hiuk Son||Toward Cancer Treatment Using Terahertz Radiation: Demethylation of Cancer DNA|
|144||April 11 (Thu.), 16:00 PM||#1323, E6-2||Prof. Joo-Hyoung Lee, GIST||Massive screening for cathode active materials using deep neural network|
|143||May 2 (Thu.), 4:00 PM||#1323, E6-2||Prof. Joon Ik Jang||Anomalous optical properties of halide perovskites|
|142||October 29 (Tue.), 14:30 PM||#1323, E6-2||Prof. Jörg Wrachtrup||Quantum sensing|
|141||October 11 (Thu.), 16:00 PM||#1323, E6-2||Prof. Joung-Real Ahn||Dirac electrons in a graphene quasicrystal|
|140||June 3rd, Fri. 9:30 AM||Online seminar||Prof. Juejun Hu ( Massachusetts Institute of Technology)||(Quantum-&Nano-Photonics Webinar) Seeing glass in a new light: reimagine chalcogenide photonics|
|139||MAR. 26 (TUE), 0300 PM||E6-2. 2st fl. #2501||Prof. Jung Hoon Han||Consideration of thermal Hall effect in frustrated and un-frustrated quantum magnets|
|138||DEC. 16~18 (Sun~Tue)||E6-2. 1st fl. #1323||Prof. Keisuke Totsuka||Lectures on 2d Conformal Field Theory|
|137||June 14 (THU), 10:00 AM||E6-2, 2nd fl. #2502||Prof. Kenji Toyoda||Phonons and polariton-like particles in trapped ions for quantum computation and quantum simulation|