|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 M. J. Lawler "Supersymmetry protected phases of isostatic lattices and kagome antiferromagnets", Unpublished, see arXiv:1510.03697.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||2019/09/18 - 12/5||Seminar Room #1323||Prof. David Schuster and etc.||Fall 2019: Physics Seminar Serises|
|공지||2019/09/02 - 12/09||Seminar Room 1501||이호성 박사 (한국표준과학연구원) and etc.||Fall 2019: Physics Colloquium|
|68||June 4 (Tue.), 5:00 PM||#1323, E6-2||Prof. Minsu Kim||Stochastic nature of bacterial eradication using antibiotics|
|67||DEC. 27 (Thu), 04:00 PM||E6-2. 1st fl. #1323||Prof. Na Young Kim||Quantum Innovation (QuIN) Laboratory|
|66||October 17 (Thu.), 16:00 PM||#1323, E6-2||Prof. Namkyoo Park||Top down manipulation of Waves : From Metamaterials, Correlated Disorder, Quantum Analogy, to Digital Processing|
|65||August. 14th (Wed.), 4:00PM,||Rm. 1323, E6||Prof. Nicolas Treps||Quantum Optics, at the heart of quantum metrology and quantum information|
|64||Aug. 16 (Wed.), 4 PM||#1322 (E6-2. 1st fl.)||Prof. Noejung Park (UNIST)||Phonon-driven spin-Floquet valleytro-magnetism|
|63||October 15 (Tue.), 16:00 PM||#1323, E6-2||Prof. Pilkyung Moon||Moiré superlattices and graphene quasicrystal|
|62||4월 18일(월), 15:30~||KI빌딩(E4), 강의실 B501 (5F)||Prof. Robert A. DiStasio Jr. (Cornell University)||First Principles Approaches for Intermolecular Interactions: From Gas-Phase Dimers to Liquid Water and Molecular Crystal Polymorphism|
|61||2018. 6. 22 10:00am ~ 11:50am||E6-6, Lecture Room 119 (1F)||Prof. Sang Bok Lee, Dept. of Chemistry and Biochemistry, Univ. of Maryland||Success in Research Career|
|60||NOV. 23 (Fri), 03:00 PM||E6-2. 2st fl. #2501||Prof. Sang-Jin Sin||Entanglement string and Spin Liquid with Holographic duality|
|59||October 29 (Tue.), 10:00am||#1323 (E6-2, 1st fl.)||Prof. Se Kwon Kim||Unconventional Spin Transport in Quantum Materials|
|58||November 21 (Wed.), 15:00 PM||#1323, E6-2||Prof. Seongshik Oh||Engineering topological quantum physics at the atomic scale|
|57||June 14, 2016 (Tue) 3PM||#1323 (E6-2 1st fl.)||Prof. Seungyong Hahn, Florida State University||No-Insulation High Temperature Superconductor Magnet Technology for Compact, Reliable, and Low-Cost High Field DC Magnets|
|56||December 18 (Tue.), 4:00 PM||#1323, E6-2||Prof. Shin-ichi Uchida||Road to Higher Tc Superconductivity|
|55||2019. 7. 16(화)||Rm. 1323 (E6-2)||Prof. Sidney Nagel||2019 Physics Distinguished Lecture|
|54||July 10 (Wed.), 04:00 PM-||Academic Cltural Complex (E9) 5층 스카이라운지||Prof. Sidney Nagel/Young-Kee Kim||Public Lectures|
|53||October 4 (Thu.), 16:00 PM||#1323, E6-2||Prof. Soo Jin Kim||Engineering light absorption in an ultrathin semiconductor metafilm|
|52||December 5 (Thu.), 16:00 PM||#1323, E6-2||Prof. Soon-Hong Kwon||Subwavelenth Photonic Devices: From Single Photon Sources to Solar Cell|
|51||May 24 (Fri.), 16:00 PM||#1323, E6-2||Prof. Soonjae Moon||Infrared spectroscopy study on metal-insulator transitions in layered perovskite iridates|
|50||April 4 (Thu.), 16:00 PM||#1323, E6-2||Prof. Su-Hyun Gong||Chiral spin-photon interaction at nanoscale|
|49||Nov. 22th (Thur), 15:00||E6 Room(#1323)||Prof. Suprijadi Haryono||Experimental and Computational Study on Physical Properties based on Granular System|