Results 81 to 90 of about 631,257 (354)

Observation of Topological Chirality Switching Induced Freezing of a Skyrmion Crystal

Advanced Materials, EarlyView.
Using Lorentz Transmission electron microscopy, it is shown that in the insulating van der Waals ferromagnet, CrBr3, a magnetic field can cause Bloch skyrmionic bubbles to spontaneously switch their chirality. As achiral type‐II bubbles are an intermediate state, the bubbles rapidly elongate and shrink when switching, thereby inducing a freezing of the
John Fullerton, Yue Li, Harshvardhan Solanki, Sergey Grebenchuk, Magdalena Grzeszczyk, Zhaolong Chen, Makars Šiškins, Kostya S. Novoselov, Maciej Koperski, Elton J. G. Santos, Charudatta Phatak   +10 more
wiley   +1 more source

Bilayer Kagome Borophene with Multiple van Hove Singularities

Advanced Science
The appearance of van Hove singularities near the Fermi level leads to prominent phenomena, including superconductivity, charge density wave, and ferromagnetism.
Qian Gao, Qimin Yan, Zhenpeng Hu, Lan Chen   +3 more
doaj   +1 more source

Exact QFT duals of AdS black holes

Journal of High Energy Physics, 2023
We construct large N saddle points of the matrix model for the N $$ \mathcal{N} $$ = 4 Yang- Mills index dual to the BPS black holes in AdS 5 × S 5, in two different setups.
Sunjin Choi, Saebyeok Jeong, Seok Kim, Eunwoo Lee   +3 more
doaj   +1 more source

Saddled by the Saddle Nose: A Case of Wegener's Granulomatosis

Clinical Dermatology Review
Wegener's Granulomatosis with polyangiitis (GPA) is a systemic disease of unknown etiology characterized by necrotizing granulomatous inflammation, tissue necrosis, and variable degrees of vasculitis in small- and medium-sized blood vessels. The classical clinical triad consists of involvement of the upper airways, lungs, and kidneys.
Kanathur Shilpa, Heera Ramesh, Sachin Somashekhar, B Leelavathy   +3 more
openaire   +2 more sources

Labrador Sea freshening at 8.5 ka BP caused by Hudson Bay Ice Saddle collapse

Nature Communications, 2019
A significant reduction in the Atlantic Meridional Overturning Circulation and rapid northern Hemisphere cooling 8200 years ago have been linked to the final melting of the Laurentide Ice Sheet.
A. Lochte, J. Repschläger, M. Kienast, D. Garbe‐Schönberg, N. Andersen, C. Hamann, R. Schneider   +6 more
semanticscholar   +1 more source

Polar Indirect Valley as a Limiting Factor for Radiative Efficiency in Gold‐Based Mixed‐Valence Double Perovskites

Advanced Optical Materials, EarlyView.
This work addresses a common issue in many double perovskites: their weak luminescence. Using the example of promising infrared‐bandgap mixed‐valence gold halide double perovskites, it demonstrates strong polar electron‐phonon coupling. Temperature‐dependent spectroscopy reveals that bright polarons are favored at low temperature, while a dark low ...
Ange B. Chambissie Kameni, Alexandre Py‐Renaudie, Damien Garrot, Baptiste Berenguier, Guillaume Bouchez, Davide Raffaele Ceratti, Philip Schulz, Jean‐François Guillemoles, Géraud Delport   +8 more
wiley   +1 more source

Entropy of causal diamond ensembles

SciPost Physics, 2023
We define a canonical ensemble for a gravitational causal diamond by introducing an artificial York boundary inside the diamond with a fixed induced metric and temperature, and evaluate the partition function using a saddle point approximation.
Ted Jacobson, Manus R. Visser
doaj   +1 more source

Dynamics of Lennard-Jones clusters: A characterization of the activation-relaxation technique

, 2000
The potential energy surface (PES) of Lennard-Jones clusters is investigated using the activation-relaxation technique (ART). This method defines events in the configurational energy landscape as a two-step process: (a) a configuration is first activated
A.F. Voter, A.F. Voter, C. Lanczos, C. Roland, C.J. Cerjan, C.J. Tsai, D.J. Wales, D.J. Wales, F.H. Stillinger, F.M. Bulnes, G.T. Barkema, G.T. Barkema, G.T. Barkema, J. Pancir, J. Pillardy, J. Wang, J.G. Amar, J.P.K. Doye, J.P.K. Doye, L.J. Munro, M. Breeman, M. Breeman, M. Djafari-Rouhani, M. Djafari-Rouhani, M. Djafari-Rouhani, M.R. Hoare, N. Mousseau, N. Mousseau, N. Mousseau, N. Mousseau, Normand Mousseau, Otto F. Sankey, R.H. Leary, Rachid Malek, S. Wilson, W.H. Press   +35 more
core   +1 more source

Excitonic Anisotropy in Single‐Crystalline 2D Silver Phenylchalcogenides

Advanced Optical Materials, EarlyView.
Using a combination of ab initio theory and optical micro‐spectroscopy, in‐plane anisotropy of multiple delocalized excitons in 2D silver phenylchalcogenides (AgEPh; E = S, Se, Te) is predicted and characterized. Cryogenic reflectance micro‐spectroscopy further reveals the fine structure of excitonic bands in AgSePh.
Woo Seok Lee, Yeongsu Cho, Katarzyna Posmyk, Paulina Peksa, Mateusz Dyksik, Nicholas Samulewicz, Paulina Plochocka, Michał Baranowski, Heather J. Kulik, William A. Tisdale   +9 more
wiley   +1 more source

Prediction of One‐Dimensional Metallicity and π‐Band Superconductivity in Rhodizonate Radical Pancakes

Angewandte Chemie, EarlyView.
Equidistant stacking of radicals is typically unstable due to symmetry‐lowering distortions. We predict that such arrangements can be stabilized by multicentered covalent (“pancake”) bonding and Coulombic repulsion between negatively charged radicals.
Alvaro Lobato, Fernando Izquierdo‐Ruiz, Martin Rahm   +2 more
wiley   +2 more sources