In this article, practical methods for synthesizing Tl-based ternary III-V-VI2 chalcogenide TlBi(S[Formula: see text]Se x )2 are described in detail, along with characterization by x-ray diffraction and charge transport properties. The TlBi(S[Formula: see text]Se x )2 system is interesting because it shows a topological phase transition, where a topologically nontrivial phase changes to a trivi...

The circular photogalvanic effect (CPGE) is the part of a photocurrent that switches depending on the sense of circular polarization of the incident light. It has been consistently observed in systems without inversion symmetry and depends on non-universal material details. Here we find that in a class of Weyl semimetals (for example, SrSi2) and three-dimensional Rashba materials (for example, ...

Adolfo G. Grushin, Jörn W. F. Venderbos, Ashvin Vishwanath, and Roni Ilan Department of Physics, University of California, Berkeley, California 94720, USA Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA Raymond and Beverly Sackler School of Physics and Astronomy, Tel ...

Cathodoluminescence (CL) spectroscopy is performed on conducting 1and 2-dimensional gratings of metals, semimetals and semi-conductors of varying periods from 0.5 to 20 microns for a range of grating amplitudes from 0.1 to 4.6 microns. The overall emission spectrum consists of a 400 nm wide band centered at ~600 nm which depends little on the grating period, grating amplitude, material, e-beam ...

We investigate collective modes in three dimensional (3D) gapless multi-Weyl semimetals with anisotropic energy band dispersions (i.e., with a positive integer J). For comparison, we also consider the gapless semimetals with the isotropic band dispersions (i.e. E ~ kJ). We calculate analytically long-wavelength plasma frequencies incorporating interband transitions and chiral properties of carr...

In this work, the systems are constructed with the defect lines of B-B or N-N dimers embedded in a graphene matrix using density functional theory. It is found that the Dirac-cone dispersions appear at the Fermi level in the bands introduced by the B or N heteroatom, linear B-B or N-N dimers, demonstrating that the carrier mobility is ∼10(6) m s(-1) which is comparable with that of the pristine...

E-G. Moon, C. Xu, Y. B. Kim, and L. Balents, Non-Fermi liquid and topological states with strong spin-orbit coupling, Phys. Rev. Lett. 111, 206401 (2013). O. Vafek, J. M. Murry, and V. Cvetkovic, Superconductivity on the brink of spin-charge order in doped honeycomb bilayer, Phys. Rev. Lett. 112, 147002 (2014) and M. Murray and O. Vafek, Excitonic and superconducting orders from repulsive inter...

Chiral anomaly, a non-conservation of chiral charge pumped by the topological nontrivial gauge fields, has been predicted to exist in Weyl semimetals. However, until now, the experimental signature of this effect exclusively relies on the observation of negative longitudinal magnetoresistance at low temperatures. Here, we report the field-modulated chiral charge pumping process and valley diffu...

In electronic topological Dirac semimetals (DSMs) the conduction and valence bands touch at discrete points in the Brillouin zone and formDirac cones. They are robust against spin–orbit interaction (SOI) and protected by crystal symmetries. They can be driven to different topological phases by breaking the symmetries. In the low-temperature quantummagnetic systems themagnon dispersions have sim...