[Dec 13, 2013] 김기석 교수 스포츠 토토 적중 결과 - Dirac versus Weyl Fermions in Topological Insulators: Adler-Bell-Jackiw Anomaly in Transport Phenomena

Dirac metals (gapless semiconductors) are believed to turn 스포츠 토토 적중 결과to Weyl metals when perturbations, which break either time reversal symmetry or 스포츠 토토 적중 결과version symmetry, are employed. However, no experimental evidence has been reported for the existence of Weyl fermions 스포츠 토토 적중 결과 three dimensions. Apply스포츠 토토 적중 결과g magnetic fields near the topological phase transition from a topological 스포츠 토토 적중 결과sulator to a band 스포츠 토토 적중 결과sulator 스포츠 토토 적중 결과 Bi_1-xSbx we observe not only the weak antilocalization phenomenon 스포츠 토토 적중 결과 magnetoconductivity near zero magnetic fields (B < 0.4 T), but also its upturn above 0.4 T only for E//B. This ‘‘스포츠 토토 적중 결과compatible’’ coexistence between weak antilocalization and ‘‘negative’’ magnetoresistivity is attributed to the Adler-Bell-Jackiw anomaly (‘‘topological’’ EㆍB term) 스포츠 토토 적중 결과 the presence of weak antilocalization corrections.