Weyl and Dirac semimetals are three-dimensional phases of matter with gapless electronic
excitations that are protected by topology and symmetry. As three-dimensional analogs of …

Three-dimensional topological (crystalline) insulators are materials with an insulating bulk
but conducting surface states that are topologically protected by time-reversal (or spatial) …

Polar metals are challenging to identify spectroscopically because the fingerprints of electric
polarization are often obscured by the presence of screening charges. Here, we unravel …

Bismuth-based materials have been instrumental in the development of topological physics,
even though bulk bismuth itself has been long thought to be topologically trivial. A recent …

In the ferromagnetic (FM) Weyl semimetal CeAlSi both space-inversion and time-reversal
symmetries are broken. Our quantum oscillation (QO) data indicate that the FM ordering …

The introduction of topological invariants, ranging from insulators to metals, has provided
new insights into the traditional classification of electronic states in condensed matter …

Non-volatile phase-change memory devices utilize local heating to toggle between
crystalline and amorphous states with distinct electrical properties. Expanding on this kind of …

Recent progress in understanding the electronic band topology and emergent topological
properties encourage us to reconsider the band structure of well-known materials including …

The nonlinear Hall effect (NLHE) reflects Berry-curvature-related properties in non-
centrosymmetric but time-reversal-symmetric materials. So far, the NLHE of the investigated …

In oxide heterostructures, different materials are integrated into a single artificial crystal,
resulting in a breaking of inversion symmetry across the heterointerfaces. A notable example …