Max Planck Institute for the Structure and Dynamics of Matter

Excitonic Physics in Emerging 2D Semiconductors: A First-Principles Many-Body Perspective from Photodetection to Solar Energy Conversion

Abstract Chemically and structurally diverse two-dimensional semiconductors exhibit a broad range of excitonic and optical phenomena that have direct implications for optoelectronic functionality. We examine these materials from a first-principles many-body perspective, emphasizi...

2D theoretically twistable material database

The study of twisted two-dimensional (2D) materials, in which twisting layers create moiré superlattices, has created opportunities for investigating topological phases and strongly correlated physics. The broader potential of a seemingly infinite set of twistable 2D materials re...

Probing picosecond depairing currents in type-II superconductors

Abstract Accessing the intrinsic critical current density in type-II superconductors can provide a means to probe microscopic superconducting properties and increase current limits in high-magnetic-field devices and electrical power systems. However, the critical current density...

Trion Hall effect in electron–hole double layers

Abstract The realization of Coulomb-coupled electron–hole double layers has enabled the exploration of equilibrium excitons—bound electron–hole pairs—without a magnetic field. Doping an exciton fluid with additional electrons or holes further creates an equilibrium fluid of trion...

Enhancing Measurement Precision of Non-Degenerate Two-Photon Absorption

Abstract Non-classical light may enhance the resolution of optical measurements. Here, we analyze non-degenerate two-photon absorption signals obtained from transmission measurements with two-mode squeezed states of light. In particular, we investigate how correlations between th...

Coherent terahertz magnon–phonon three-wave mixing in a layered antiferromagnet

The coherent nonlinear dynamics between collective excitations, such as magnons and phonons, drive emergent phenomena in quantum materials, yet their direct observation remains limited. Here, using double-terahertz-pump optical-probe spectroscopy, we report the direct observation...

Distinct lattice and charge excitations in AV3Sb5 kagome superconductors

The kagome superconductor family A V 3 Sb 5 ( A = Cs, Rb, K) provides a rich platform for exploring diverse electronic symmetry breaking phenomena, including superconductivity and various forms of density wave orders. Although these compounds share the identical lattice structure...

Moiré‐Induced Symmetry Breaking of Charge Order in van der Waals Heterostructures

ABSTRACT Layered materials that stack different lattice symmetries are rare in nature. Misfit layered chalcogenides, which combine square and hexagonal lattices of rocksalt monochalcogenides and transition‐metal dichalcogenides, provide a platform to explore how incommensurabilit...

Optically induced Faraday–Goldstone waves

Faraday waves, typically observed in driven fluids, result from the confluence of nonlinearity and parametric amplification. Here we show that optical pulses can generate analogous phenomena that persist much longer than the pump time-scales in ordered quantum solids. We present...

Testing electron–photon exchange–correlation functional performance for many-electron systems under weak and strong light–matter coupling

We present results for a photon-free exchange–correlation functional within the local density approximation (pxcLDA) for quantum electrodynamics density functional theory (QEDFT), which efficiently describes the electron density of many-electron systems across weak to strong ligh...