The exciton, a bound state of an electron and a hole, is a fundamental quasiparticle induced
by coherent light–matter interactions in semiconductors. When the electrons and holes are …

Ruddlesden-Popper (RP) perovskites are two-dimensional semiconductors for high-
performance optoelectronic devices. In this work, we report a long in-plane carrier diffusion …

Monolayer transition-metal dichalcogenides in the T′ phase could enable the realization of
the quantum spin Hall effect at room temperature, because they exhibit a prominent spin …

Excitonic insulators host a condensate of electron-hole pairs at equilibrium, giving rise to
collective many-body effects. Although several materials have emerged as excitonic …

Driven and non‐equilibrium quantum states of matter have attracted growing interest in both
theoretical and experimental studies in condensed matter physics. Recent progress in …

Topological insulators and Weyl semimetals have demonstrated a helicity-dependent
photocurrent (HDPC). In contrast, Dirac semimetals (DSMs) possess chirality-degenerate …

Majorana zero modes (MZMs) have been intensively studied in recent decades theoretically
and experimentally as the most promising candidate for non-Abelian anyons supporting …

Excitonic insulators are insulating states formed by the coherent condensation of electron
and hole pairs into BCS-like states. Isotropic spatial wave functions are commonly …

Chemical modifications such as intercalation can be used to modify surface properties or to
further functionalize the surface states of topological insulators (TIs). Using ambient pressure …

Topological insulator (TI) nanoribbons (NRs) provide a platform for investigating quantum
interference oscillations combined with topological surface states. One-dimensional …