Author(s): Dominik Gresch, Gabriel Autès, Oleg V. Yazyev, Matthias Troyer, David Vanderbilt, B. Andrei Bernevig, and Alexey A. SoluyanovThe intense theoretical and experimental interest in topological insulators and semimetals has established band structure topology as a fundamental material property. Consequently, identifying band topologies has become...

Author(s): Iksu Jang, Jae-Ho Han, and Ki-Seok KimApplying time-varying magnetic fields to Weyl metals, a pair of Weyl points becomes oscillating. This oscillating monopole and antimonopole pair gives rise to ac Berry magnetic fields, responsible for the emergence of Berry electric fields, which have not been discussed before at least in the contex…...

Author(s): Pallab Goswami, Bitan Roy, and Sankar Das SarmaStrong electronic interactions and spin-orbit coupling can be conducive for realizing novel broken symmetry phases supporting quasiparticles with nontrivial band topology. 227 pyrochlore iridates provide a suitable material platform for studying such emergent phenomena where both topology and...

Author(s): Mário G. SilveirinhaLight waves propagating in optical fibers or other guides are usually vulnerable to defects or channel deformations, such as twisting and bending. These perturbations invariably generate undesired reflections and scattering and typically imply a power penalty. Here, building on an analogy with electronics and with the...

Author(s): Tomoya Asaba, B. J. Lawson, Colin Tinsman, Lu Chen, Paul Corbae, Gang Li, Y. Qiu, Y. S. Hor, Liang Fu, and Lu LiQuantum computers need new materials to protect their delicate quantum states. Evidence for such a material—a topological superconductor—has been detected as a breaking of rotational symmetry in a crystal of Nb-doped Bi2Se3. [Phys....

Author(s): Gang Li, Binghai Yan, Zhijun Wang, and Karsten HeldTopological Dirac semimetals (DSMs) exhibit nodal points through which energy bands disperse linearly in three-dimensional (3D) momentum space, a 3D analog of graphene. The first experimentally confirmed DSMs with a pair of Dirac points (DPs), Na3Bi and Cd3As2, show topological surface Fermi...