logo

korean english

게시판

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 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 1078136
605 2019학년도 1학기 콜로퀴움 일정 2019.01.08 128567
604 <5/29> Nanomaterials Work at NASA-Johnson Space Center 2009.05.25 127781
603 <12/3> Characteristic of risk asset in financial market. 2010.11.29 127672
» <5/16(Thu.) 14:00 ~ >The Chiral anomaly without Landau levels 2019.05.08 127211
601 <3/12(화)>물리학과 특별초청강연 개최 안내 2013.03.04 126655
600 <4/21> Experimental and Observational Astrophysics in the Infrared Wavebands 2009.04.17 126348
599 <10/17> Graphitic Carbon Nanostructures 2008.10.27 126160
598 <April.17(Wed.)> Emerging Artificial Synapse for Learning- and Energy-Efficient Neuromorphic System 2019.04.11 126005
597 <11/5> Modified nucleic acid systems for biomedical applications 2010.11.01 125860
596 <5/1>In vivo optical imaging of hemodynamic changes 2009.05.06 125542
595 <10/28>Grazing Incidence X-ray Diffraction and Surface X-ray Scattering Study of Hematite (α-Fe2O3) Nano-cube 2011.10.26 125476
594 <3/19> Bioconjugates of nanomaterials for biochip & biosensor applications 2010.03.16 125014
593 <12/30> Dirac vs. Weyl in topological insulators: Adler-Bell-Jackiw anomaly in transport phenomena 2013.12.16 123682
592 <4/14> X-ray absorption fine structure analyses on amorphous oxide films 2009.04.06 123224
591 <4/30(화)> DC (DNA Curtains) and AC (Actin Curtains) in single-molecule biophysics 2013.04.11 122350
590 <4/30> Updates on warped brane inflation 2009.04.21 121919
589 <3/31> ZnO nanorod heterostructures and nanodevices 2006.03.27 121032
588 <3/26> Fractional Hall Physics of Epitaxial Graphene: 2010.03.19 120850
587 <1/28> Steps towards a non-relativistic AdS/CFT 2010.01.25 120802
586 <5/15>Black Hole Entropy Function in (Anti-)de Sitter Space-Time 2008.05.09 120156