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Thermodynamic signatures for the existence of Dirac electrons in ZrTe5
Nityan L. Nair, Philipp T. Dumitrescu, Sanyum Channa +4
We combine transport, magnetization, and torque magnetometry measurements to investigate the electronic structure of ZrTe5 and its evolution with temperature. At fields beyond the…
Quantum oscillations from generic surface Fermi arcs and bulk chiral modes in Weyl semimetals
Yi Zhang, Daniel Bulmash, Pavan Hosur +2
We re-examine the question of quantum oscillations from surface Fermi arcs and chiral modes in Weyl semimetals. By introducing two tools - semiclassical phase-space quantization an…
Transport evidence for Fermi-arc mediated chirality transfer in the Dirac semimetal CdAs
Philip J. W. Moll, Nityan L. Nair, Tony Helm +4
Dirac semi-metals show a linear electronic dispersion in three dimension described by two copies of the Weyl equation, a theoretical description of massless relativistic fermions.…
Landau Quantization and Quasiparticle Interference in the Three-Dimensional Dirac Semimetal Cd3As2
Sangjun Jeon, Brian B. Zhou, Andras Gyenis +7
Condensed matter systems provide a rich setting to realize Dirac and Majorana fermionic excitations and the possibility to manipulate them in materials for potential applications.…
Quantum Oscillations from Surface Fermi-Arcs in Weyl and Dirac Semi-Metals
Andrew C. Potter, Itamar Kimchi, Ashvin Vishwanath
The surface states of Weyl semi-metals (SM's) consist of disjointed Fermi-arcs. This unusual surface-Fermiology provides a fingerprint of the topological features of the bulk Weyl-…
Anomalous Supercurrent from Majorana States in Topological Insulator Josephson Junctions
Andrew C. Potter, Liang Fu
We propose a Josephson junction setup based on a topological insulator (TI) thin film to detect Majorana states, which exploits the unique helical and extended nature of the TI sur…