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Seminar

Surface Fermi arcs and bulk chiral magneto-transport of the TaAs family Weyl semimetals

Wednesday, 06 July 2016, 13:30-15:00
Institute of Nanotechnology Seminar room 0-167
Talk given by Dr. Binghai Yan Max Planck Institute for Chemical Physics of Solids Dresden, Germany Abstract: Topological Weyl semimetals represent a novel state of topological quantum matter, which not only possesses Weyl fermions in the bulk and unique Fermi arcs from topological surface states, but also exhibits appealing physical properties such as extremely large magnetoresistance and ultra-high carrier mobility. In this talk, I will first present our recent theoretical [1] and ARPES [2,3] study on the topological surface states of transition-metal monopnictides, NbP, NbAs, TaP and TaAs. By visualizing the surface Fermi arcs, we discovered their Fermiology evolution with spin–orbit coupling strength. Further, we found a way to manipulate the Fermi arcs with the Lifshitz transition. I will also introduce our recent progress on the magneto-transport in the search for the chiral anomaly effect [4,5]. References: [1] Y. Sun, S. C. Wu, and B. Yan, Phys. Rev. B 92, 115428 (2015). [2] L. X. Yang, et al. Nature Physics 11, 728 (2015). [3] Z. K. Liu, et al. Nature Materials DOI: 10.1038/NMAT4457 (2015). [4] C. Shekhar, et al. Nature Physics 11, 645 (2015). [5] F. Arnold, et al. Nature Comms. in press. see also arXiv:1506.06577 (2015).
This event is part of the eventgroup INT Talks
Speaker
Dr. Binghai Yan

Max Planck Institute for Chemical Physics of Solids
http://www.cpfs.mpg.de/yan
Organizer
Dr. Igor Gornyi
Institute of Nanotechnology (INT)
Karlsruhe Institute of Technology (KIT)
Eggenstein-Leopoldshafen
Mail: igor gornyi does-not-exist.kit edu
Targetgroup
Interested / Everyone
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