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SYHE: Symposium Hydrodynamic Electronics: Transport in ultra-pure Quantum Systems

SYHE 1: Hydrodynamic electronics: Transport in ultra-pure quantum systems

SYHE 1.3: Hauptvortrag

Mittwoch, 3. April 2019, 10:30–11:00, H1

Topological Materials with liquid electrons — •Claudia Felser and Johannes Gooth — Max Planck Institute Chemical Physics of Solids

Topology a mathematical concept became recently a hot topic in condensed matter physics and materials science and the identification via elementary band representation is easy [1,2]. One important criteria for the identification of topological material is the band inversion and the crystal symmetry. In my talk I focus on Weyl semimetals. Binary phoshides are the ideal material class for a systematic study of Weyl physics. Weyl points, a new class of topological phases was also predicted in NbP, NbAs. TaP, MoP and WP2 [3-6]. In NbP micro-wires we have observed the chiral anomaly but NbP has served also as a model system for astrophysics: realizing the gravitational anomaly in NbP with a ultrahigh mobility [3,4] and the hydrodynamic flow of electrons in WP2 [5]. MoP and WP2 show exceptional properties such as high conductivity higher than copper [5,6], high mobilities and a high magneto-resistance effect. [1] Bradlyn et al., Nature 547 298, (2017) [2] Vergniory, et al., preprint arXiv:1808.01163 [3] Shekhar, et al., Nat. Phys. 11, 645 (2015) [4] Gooth et al., Nature 547, 324 (2017) [5] Gooth et al., Nat. Com. 9, 4093 (2018) [6] Kumar, et al., Nat. Com. 8, 1642 (2017)