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 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 1031207
602 <11/5> Modified nucleic acid systems for biomedical applications 2010.11.01 110229
601 <10/28>Grazing Incidence X-ray Diffraction and Surface X-ray Scattering Study of Hematite (α-Fe2O3) Nano-cube 2011.10.26 110161
600 <Nov.13(Fri) 16:00> Kondo screening in mixed valence and heavy fermion compounds and the signatures of Nozieres’ exhaustion 2015.11.04 110034
599 <10/17> Graphitic Carbon Nanostructures 2008.10.27 109966
598 <3/19> Bioconjugates of nanomaterials for biochip & biosensor applications 2010.03.16 109613
597 <3/31> ZnO nanorod heterostructures and nanodevices 2006.03.27 109360
596 <1/28> Steps towards a non-relativistic AdS/CFT 2010.01.25 109304
595 <8/5>Brane superpotential via local Calabi-Yau spaces 2009.08.03 109199
594 2018학년도 1학기 콜로퀴움 일정 2018.01.03 108841
593 <4/21> Experimental and Observational Astrophysics in the Infrared Wavebands 2009.04.17 108421
592 <5/14> Search for exotic materials: strongly correlated electron system 2010.05.10 108236
591 <5/21> Magnetism and Superconductivity 2014.05.14 106911
590 2017학년도 2학기 콜로퀴움 일정 2017.07.04 105761
589 <3/26> Fractional Hall Physics of Epitaxial Graphene: 2010.03.19 104836
588 2014학년도 2학기 콜로퀴움 일정 2014.09.11 104820
587 <3/12(화)>물리학과 특별초청강연 개최 안내 2013.03.04 104169
586 <7/28> NQR/NMR study on a single crystal of LiFeAs 2010.07.20 103908
585 <10/15> How can population pyramids be used to explore the past? 2010.10.14 103590
584 <6/8> 액체금속 및 물의 과냉각 현상과 국소구조와의 관계 : 정전기 공중부양 기술 및 dynamic diamond anvil cell 2011.06.07 103325
583 <4/30(화)> DC (DNA Curtains) and AC (Actin Curtains) in single-molecule biophysics 2013.04.11 103082