Sökresultat

Filtyp

Din sökning på "*" gav 563089 sökträffar

Discovery of charge order above room-temperature in the prototypical kagome superconductor La(Ru1−xFex)3Si2

The kagome lattice is an intriguing and rich platform for discovering, tuning and understanding the diverse phases of quantum matter, crucial for advancing modern and future electronics. Despite considerable efforts, accessing correlated phases at room temperature has been challenging. Using single-crystal X-ray diffraction, we discovered charge order above room temperature in La(Ru1−xFex)3Si2 (x

Depth-dependent study of time-reversal symmetry-breaking in the kagome superconductor AV3Sb5

The breaking of time-reversal symmetry (TRS) in the normal state of kagome superconductors AV3Sb5 stands out as a significant feature, but its tunability is unexplored. Using low-energy muon spin rotation and local field numerical analysis, we study TRS breaking as a function of depth in single crystals of RbV3Sb5 (with charge order) and Cs(V0.86Ta0.14)3Sb5 (without charge order). In the bulk of R

Scandinavian Late‐medieval Elite Architecture on Land and at Sea. : A Spatial Study of the Castle Glimmingehus and the Warship Gribshunden

Abstract in FrenchL’architecture éminente scandinave à la fin du Moyen-Âge sur terre et en mer. Une étude spatiale du château de Glimmingehus et du navire de guerre Gribshunden Par MARTIN HANSSON et BRENDAN FOLEYCe papier compare l’utilisation sociale de l’espace dans les châteaux et les navires de guerre à la fin du Moyen-Âge. Les principales études de cas utilisées sont le château de GlimmingehuTHIS PAPER COMPARES THE SOCIAL USE OF SPACE in late-medieval castles and warships. The main case studies used are the noble castle of Glimmingehus in present-day Sweden, built 1499 to 1505, and the royal warship Gribshunden, in use from the mid-1480s until its sinking in 1495; we also refer to the later and fully excavated warships Mary Rose and Vasa. Both castles and warships are examples of elit

Pressure-induced enhancement of superfluid density in transition metal dichalcogenides with and without charge density wave

Gaining a deeper understanding of the interplay between charge density wave (CDW) order and superconductivity in transition metal dichalcogenides (TMDs), particularly within the (4H/2H)-NbX2 (X=Se and S) family, remains an open and intriguing challenge. A systematic microscopic study across various compounds in this family is therefore required to unravel this complex interplay. Here, we report on

Parametric actors networks to efficient hardware : CORDIC-based QR decomposition

In this work, we present an actors-to-hardware design flow where applications are described as networks of actors and compiled to hardware. Specifically, we use the CAL actor language to describe these applications. CAL has previously been used to specify applications such as the MPEG-RVC decoder and is well suited for compilation to hardware. A key limitation of CAL is that the applications descr

Temperature driven crossover from abrupt thermal to gradual field driven RESET in single-layer HfO₂ RRAMs

We investigate the temperature-dependent resistive switching behavior of single-layer ITO/HfO₂/TiN resistive random access memory devices down to 10K. Devices formed at room temperature exhibit abrupt, Joule-heating-assisted RESET transitions that evolve into gradual, field-driven processes upon cooling. We found that the RESET voltage increases steadily with decreasing temperature, while the memo

The role of workplace innovation for open eco-innovation : evidence from the community innovation survey

For developing and implementing innovations that improve a firm's environmental performance ('eco-innovation'), external knowledge and technologies, and hence the openness of a firm, are crucial. This paper analyses the factors that drive eco-innovation in firms, drawing special attention to the firm's ability to implement new ways of working within the organisation ('workplace innovation'). Based

The mechanism of natural age-strengthening of grey cast iron : PEC-ageing

In this work we introduce the concept of natural ageing via precipitation arising from eutectic cell structure (PEC-ageing). Natural age-strengthening in grey cast iron at room temperature is long recognised yet still poorly understood, despite its beneficial effect on tensile strength and machinability. We investigate its underlying mechanisms by comparing fresh and naturally aged industrial grey

On the importance of time constants in spiking neural networks

Time constants in spiking neural networks (SNNs) are crucial for determining performance. While prior work shows that learning time constants can improve accuracy, it typically assumes near-optimal initial values and rarely examines recovery from poor initializations. We systematically study how membrane and synaptic time constants affect SNN performance using multiple training strategies. Our res

Indications, contraindications, and step-by-step methodology for performing carotid sinus massage in patients presenting with syncope : A scientific statement of an Ad Hoc Syncope Consortium endorsed by: the European Autonomic Society (EFAS), Gruppo Italiano Multidisciplinare Syncope (GIMSI) and European Geriatric Medicine Society (EuGMS)

Carotid sinus massage (CSM) is essential in evaluating recurrent unexplained reflex syncope, as it uniquely identifies cardioinhibitory forms that other tests may miss. CSM is largely underused in clinical practice outside dedicated syncope facilities and, when performed, its execution varies, as does the interpretation of results. Underuse affects the diagnostic yield of CSM in the syncope evalua

Unveiling nodeless unconventional superconductivity proximate to honeycomb-vacancy ordering in the Ir-Sb binary system

Vacancies in solid-state physics are underexplored in materials with strong electron-electron correlations. Recent research on the Ir-Sb binary system revealed an extended buckled-honeycomb vacancy (BHV) order. Superconductivity arises by suppressing BHV ordering through high-pressure growth with excess Ir atoms or Rh substitution, yet the superconducting pairing nature remains unknown. To explore

Microscopic probing of the superconducting and normal state properties of Ta2V3.1Si0.9 by muon spin rotation

The two-dimensional kagome lattice is an experimental playground for novel physical phenomena, from frustrated magnetism and topological matter to chiral charge order and unconventional superconductivity. A newly identified kagome superconductor, Ta2V3.1Si0.9 has recently gained attention for possessing a record high critical temperature, TC = 7.5 K for kagome metals at ambient pressure. In this s

Rebuilding Public Reason in an AI-Mediated Age

Democratic argument is not failing for lack of logic. It is failing because the shared ground beneath logic – the premises citizens once held in common – has fractured under information environments engineered for engagement rather than truth. When the same evidence is anchored by incompatible starting points, argument cannot cross; communities harden into fortresses built not from facts, but from

Microscopic study of the impurity effect in the kagome superconductor La(Ru1-xFex)3Si2

We report on the effect of magnetic impurities on the microscopic superconducting (SC) properties of the kagome-lattice superconductor La(Ru1-xFex)3Si2 using muon spin relaxation/rotation. A strong suppression of the superconducting critical temperature Tc, the SC volume fraction, and the superfluid density was observed. We further find a correlation between the superfluid density and Tc which is

Experimental Evidence for the Spiral Spin Liquid in LiYbO2

Spiral spin liquids are an exotic class of correlated paramagnets with an enigmatic magnetic ground state composed of a degenerate manifold of fluctuating spin spirals. Experimental realizations of the spiral spin liquid are scarce, mainly due to the prominence of structural distortions in candidate materials that can trigger order-by-disorder transitions to more conventionally ordered magnetic gr