The past years have seen rapid progress in the classification of topological materials. These diagnostical methods are increasingly getting explored pertinent context magnetic structures. We report on a general class electronic configurations within set anti-ferromagnetic-compatible space groups that necessarily topological. Interestingly, we find systematic correspondence between these anti-ferromagnetic phases to nontrivial ferro/ferrimagnetic counterparts readily obtained through...

Ultrathin bismuth exhibits rich physics including strong spin-orbit coupling, ferroelectricity, nontrivial topology, and light-induced structural dynamics. We use calculations to show that light can induce transitions four transient phases in monolayers. These exhibit topological character, which we illustrate using the recently introduced concept of spin bands spin-resolved Wilson loops. Specifically, find topology changes via closing electron band gaps during photoinduced phase...

This paper proposes a microscopic three-dimensional three-band model for strontium ruthenate and calculate the superconducting order from first principles. By comparing results with two key experimental probes authors pinpoint most likely orders, neither of which belong to prevailing historical hypothesis chiral p-wave order.

Recent advances in robot and sensor technology makes it possible to survey a large number of plants non destructive cost efficient way. The present research approach includes measurements with VIS/NIR multispectral camera mounted on UAV traditional manual ground measurements. analysis presented here, aims (1) evaluate the use imaging from drone as phenotyping tools, (2) compare images see how they can complement each other for an optimized (3) study reflectance response various plant species...

The study of topological band structures have sparked prominent research interest the past decade, culminating in recent formulation rather prolific classification schemes that encapsulate a large fraction phases and features. Within this context we recently reported on class unexplored thrive concept {\it sub-dimensional topology}. Although such trivial indicators representations when evaluated over complete Brillouin zone, they stable or fragile topologies within spaces, as planes lines....

We analyze the band topology of acoustic phonons in 2D materials by considering interplay between spatial/internal symmetries and additional constraints that arise from physical context. These supplemental trace back to Nambu-Goldstone theorem requirements structural stability. show this can give rise previously unaddressed nontrivial nodal charges are associated with crossing phonon branches at center ($\mathrm{\ensuremath{\Gamma}}$ point) phononic Brillouin zone. moreover apply our...

Time reversal symmetric (TRS) invariant topological insulators (TIs) fullfil a paradigmatic role in the field of materials, standing at origin its development. Apart from TRS protected strong TIs, it was realized early on that more confounding weak (WTI) exist. WTIs depend translational symmetry and exhibit surface states only certain directions making significantly difficult to match experimental success TIs. We here report discovery WTI state RhBi2 belongs optimal space group P[Formula:...

We derive quantum geometric bounds in spinful systems with spin-topology characterized by a single $\mathbb{Z}$-index protected spin gap. Our provide conditions on the topology, distinct from known associated Wilson loops and nontrivial band topologies. As result, we obtain stricter time-reversal symmetric $\mathbb{Z}_2$ index also trivial index, where metric should be otherwise unbounded. benchmark these findings first-principles calculations elemental Bismuth realizing higher even...

Fungal spores have been recognized as a significant source of particulate matter PM10. They also represent public health and air quality topic, high concentrations fungal can cause respiratory issues. Within the Copernicus Atmosphere Monitoring Service (CAMS), ECMWF operates Integrated Forecasting System with atmospheric composition extension (IFS-COMPO) to provide global forecasts reanalyses aerosols trace gases. In context Horizon Europe CAMAERA (CAMS Aerosol Advancement) project, first...

We study the relationship between momentum-space spin textures projected onto occupied bands and Wilson loop winding, proving a map band topology in certain restricted symmetry settings relevant to fragile topology. Our results suggest that, specific scenarios, gap may act as smoking gun bulk indicator for

Abstract Mn 3 Sn is a material that has attracted lot of attention lately for its topologically non-trivial band structure, which leads to very promising spintronic properties. In this work we experimentally demonstrate an epitaxially grown thin film acts as source THz radiation at room temperature when irradiated by femtosecond laser pulse. By combining various experimental measurements function pump polarisation, magnetic field, and sample orientation are able explain the origin emission...

In Nature, α-quartz crystals frequently form contact twins, which are two adjacent with the same chemical structure but different crystallographic orientation, sharing a common lattice plane. As crystallizes in chiral space group, such twinning can occur between enantiomorphs handedness or opposite handedness. Here, we use first-principles methods to investigate effect of and chirality on bulk surface phonon spectra, as well topological properties phonons α-quartz. We demonstrate that, even...

We present an optical pump-THz emission study on non-collinear antiferromagnet Mn$_3$Sn. show that Mn$_3$Sn acts as a source of THz radiation when irradiated by femtosecond laser pulses. The polarity and amplitude the emitted fields can be fully controlled polarisation excitation. explain with photocurrents generated via photon drag effect combining various experimental measurements function pump polarisation, magnetic field, sample orientation thorough symmetry analysis response tensors.

We present local and nonlocal electrical transport measurements of the correlated insulator FeSb$_2$. By employing wiring configurations that delineate between bulk- surface-dominated conduction, we reveal formation a metallic surface state in FeSb$_2$ for temperatures $\lessapprox 5$~K. This result is corroborated by an angular rotation study this material's magnetotransport, which also shows signatures transition from to conduction over same temperature interval as local/nonlocal...

Primary biological aerosol particles (PBAP) are ubiquitous in the Earth’s atmosphere, and can make significant contributions to measured particulate matter (PM) concentrations [1,2]. They also known play an important role cloud formation have a impact on health [3]. The sources of PBAP, however, many complex (e.g., viruses, bacteria, algae, fungae, plant pollen), and PBAP can be emitted from both land sea sources. Although modelling pollen has...

In nature, $\alpha$-quartz crystals frequently form contact twins - two adjacent with the same chemical structure but different crystallographic orientation, sharing a common lattice plane. As crystallises in chiral space group, such twinning can occur between enantiomorphs handedness or opposite handedness. Here, we use first-principle methods to investigate effect of and chirality on bulk surface phonon spectra, as well topological properties phonons $\alpha$-quartz. We demonstrate that,...

In this work, we present the experimental observation of helicity-dependent ultrafast photocurrents in a Mn3Sn film using optical pump-Terahertz emission spectroscopy. The magnitude and direction depend on polarisation pump pulse incidence angle, but have no dependence magnetic field. We combine results with thorough symmetry analysis to argue that arise predominantly from circular photon drag effect.

Ultrathin bismuth exhibits rich physics including strong spin-orbit coupling, ferroelectricity, nontrivial topology, and light-induced structural dynamics. We use \textit{ab initio} calculations to show that light can induce transitions four transient phases in monolayers. These exhibit topological character, which we illustrate using the recently introduced concept of spin bands spin-resolved Wilson loops. Specifically, find topology changes via closing electron band gaps during...

We study the relationship between projected momentum-space spin textures and Wilson loop winding, proving a map band topology of in certain restricted symmetry settings, relevant to fragile topology. Our results suggest that gap may act as smoking gun bulk indicator for within specific scenarios.