logo

korean english

게시판

Home > 게시판 > 세미나

아래와 같이 세미나를 개최하오니 많이 참석해 주시기 바랍니다.

 

아 래

   

제목: Dirac vs. Weyl in topological insulators: Adler-Bell-Jackiw anomaly in transport phenomena

 

연사: 김 기석 교수님 (포항공대)

 

일시: 2013. 12. 30(월) 오전 10:00

 

장소: 제1과학관 2층 라운지세미나실

 

 

초록: Dirac metals (gapless semi-conductors) are believed to turn into Weyl metals when perturbations, which break either time reversal symmetry or inversion symmetry, are employed. However, no experimental evidence has been reported for the existence of Weyl fermions in three dimensions. Applying magnetic fields near the topological phase transition from a topological insulator to a band insulator in Bi1-xSbx, we observe not only the weak anti-localization phenomenon in magnetoconductivity near zero magnetic fields (B < 0.4 T) but also its upturn above 0.4 T only for E // B. This “incompatible” coexistence between weak anti-localization and “negative” magnetoresistivity is attributed to the Adler-Bell-Jackiw anomaly (“topological” E dot B term) in the presence of weak anti-localization corrections.

번호 제목 날짜 조회 수
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 1079572
567 <Nov.21(Wed.) 4:30 PM> 핵물리학과 RAON 2018.11.15 45689
566 <11/13(Tue.) 11:00am>Hund’s coupling driven role of $d_{3z^2-r^2}$ in stabilizing the hole-doped antiferromagnetic state in cuprates 2018.11.09 113228
565 <Nov.14(Wed.) 4:30 PM> Status and Prospects for the IceCube Neutrino Observatory 2018.11.07 78001
564 <11/9(Fri.) 11:00am>Geometrically frustrated magnetism on triangular lattice 2018.11.05 102869
563 <11/12(Mon.) 3:30pm>Dark Matter Probes with Astrophysical Observations 2018.11.05 56918
562 <11/6(Tue.) 3:00pm>The Surprising Solar Gamma-ray Emission from Cosmic-Ray Interactions 2018.11.03 49685
561 <Nov.7(Wed.) 4:30 PM> Hidden-in-bulk Phase Transitions in Artificial Quantum Materials 2018.10.31 100700
560 <Oct.31(Wed.) 4:30 PM> 산업에서 활용되는 수학의 세계, 산업수학이란? 2018.10.22 43348
559 <10/18(Thu.) 1:30pm>Machine Learning Approaches for Solving Physics Problems: Usability of Experimental Data 2018.10.15 80636
558 <Oct.17(Wed.) 4:30 PM> CMS 실험에서의 Machine Learning활용 2018.10.12 43673
557 <Oct.10(Wed.) 4:30 PM> Standard Model of Cosmology and Beyond 2018.09.21 111262
556 <Sep.19(Wed.) 4:30 PM> Superconducting Quantum Computing (초전도 양자컴퓨팅) 2018.09.12 63924
555 <Sep.12(Wed.) 4:30 PM> Functional Nanomaterials for Energy Harvesting 2018.09.05 85851
554 <8/24(Fri.) 3:30pm>Secret interactions of light sterile neutrinos with the DSNB 2018.08.21 62009
553 <8/23(Thu.) 2:00pm>What will we do with near-term quantum computers? 2018.08.17 57139
552 <8/2(Thu.) 2:00pm>Status of multifractional theories 2018.07.24 70384
551 [8/1(Wed.), 8/2(Thu)] Lectures on gravitational waves 2018.07.24 45096
550 <8/1(Wed.) 4:00pm>Band Topology in Nodal Line Semimetals with Z2 Monopole Charges 2018.07.23 79181
549 <7/20(Fri.) 4:00pm>Manufacturing next generation cryogen-free 1.5T MRI and cryogen-free NMR 2018.07.16 93442
548 <7/11(Wed.) 3:00pm> Traversable wormholes: two-dimensional example 2018.07.09 53705