korean english


Home > 게시판 > 세미나

다체계이론연구실과 고체전자구조계산연구실에서 University of Maryland의 김준현 박사님을 초청하여 아래와 같이 세미나를 개최합니다.

학과 구성원 여러분의 많은 참석을 부탁 드립니다.


Date/time: 2019. 05. 16(Thu.) 14:00


Place: 기초과학연구소 세미나실(31317)


Speaker: 김  준  현  박사님 (University of Maryland)


Title: The Chiral anomaly without Landau levels


Abstract:  We study the chiral anomaly in disordered Weyl semimetals, where the broken translational symmetry prevents the direct application of Nielsen and Ninomiya’s mechanism. In the weak disorder regime, there exists rare regions of the random potential where the disorder strength is locally strong, which gives rise to quasi-localized resonances and their effect on the chiral anomaly is unknown. We numerically show that these resonant states do not affect the chiral anomaly only in the case of a single Weyl node. At energies away from the Weyl point, or with strong disorder where one is deep in the diffusive regime, the chiral Landau level itself is not well defined and the semiclassical treatment is not justified. In this limit, we analytically use the supersymmetry method and find that the Chern-Simons term in the effective action which is not present in non-topological systems gives rise to a non-zero average level velocity which implies chiral charge pumping. We numerically establish that the non-zero average level velocity serves as an indicator of the chiral anomaly in the diffusive limit.

번호 제목 날짜 조회 수
공지 2022학년도 1학기 콜로퀴움 일정 2022.01.10 2227
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 813508
588 <12/19> The BLG Theory in Light-Cone Superspace 2009.12.15 77649
587 <1/28> Steps towards a non-relativistic AdS/CFT 2010.01.25 88028
586 <2/1> The Surface Science of Adsorption on Crystalline Ferroelectric Polymer Surfaces 2010.01.25 76026
585 <2/16>Development of Micromegas detectors for neutron physics 2010.02.01 80210
584 <4/2> Supersymmetric vacua of mass-deformed M2-brane theory 2010.03.29 76416
583 <4/27> Organic-based Magnet and Organic-based spintronics : New science and Technologies 2010.04.22 77919
582 <5/26>BK21 물리연구단 석학초빙 특별 세미나 2010.05.17 104027
581 <6/18> A consistent truncation of D=11 supergravity to D=4, N=2 supergravity using wrapped M5-branes 2010.06.10 74014
580 <7/9> Strange Metallic Behavior in Anisotropic Background 2010.07.01 76975
579 <7/28> NQR/NMR study on a single crystal of LiFeAs 2010.07.20 86366
578 <7/21> Next generation cryogenic free 1.5T MgB2-magnet based MRI 2010.07.20 76341
577 <8/4> Remarks on the Scalar Graviton and Consistency of Horava Gravity 2010.07.28 86033
576 <8/17> AdS Black Hole Solutions in Extended New Massive Gravity 2010.08.16 77233
575 <9/1> 원자핵 자기공명(Nuclear Magnetic Resonance) 해설 - 원자선에서 영상까지 2010.08.30 88293
574 <10/15> How can population pyramids be used to explore the past? 2010.10.14 86512
573 <11/5> Discussion on recent observation of cosmological dipole of alpha 2010.11.04 97816
572 <11/26> Effective Holographic Theories for Condensed Matter Systems 2010.11.23 76366
571 <11/29> Kahler Inflation and WMAP7 data - a top down approach to Cosmology 2010.11.25 76597
570 <12/21> Special Seminar by Professor Ilya Vekhter 2010.11.30 89303
569 <1/24> Basics of Gravitational Perturbatiosn 2011.01.19 79690