Tootfinder

Donald Trump berated President Volodymyr Zelensky in the Oval Office.
He allowed the Pentagon twice to halt prearranged military shipments to Ukraine.
He promised that when the current tranche of armaments runs out, there will be no more.
He has cut or threatened to cut the U.S. funds that previously supported independent Russian-language media and opposition.
His administration is slowly, quietly easing sanctions on Russia, ending “basic sanctions and export control …

Trump Has No Cards
Why would Putin need to make a deal with him?

Der alte, glückliche Mann und das Meer.
#CHOstNordost25

High-Throughput Quantification of Altermagnetic Band Splitting
Ali Sufyan, Brahim Marfoua, J. Andreas Larsson, Erik van Loon, Rickard Armiento
https://arxiv.org/abs/2509.14729 h…

High-Throughput Quantification of Altermagnetic Band Splitting
Altermagnetism represents a recently established class of collinear magnetism that combines zero net magnetization with momentum-dependent spin polarization, enabled by symmetry constraints rather than spin-orbit coupling. This distinctive behavior gives rise to sizable spin splitting even in materials composed of light, earth-abundant elements, offering promising prospects for next-generation spintronics applications. Despite growing theoretical and experimental interest, the discovery of alte…

Low-density InGaAs/AlGaAs Quantum Dots in Droplet-Etched Nanoholes
Saimon F. Covre Da Silva, Ailton J. Garcia Jr, Maximilian Aigner, Christian Weidinger, Tobias M. Krieger, Gabriel Undeutsch, Christoph Deneke, Ishrat Bashir, Santanu Manna, Melina Peter, Ievgen Brytavskyi, Johannes Aberl, Armando Rastelli
https://arxiv.org/abs/2508.08400

Low-density InGaAs/AlGaAs Quantum Dots in Droplet-Etched Nanoholes
Over the past two decades, epitaxial semiconductor quantum dots (QDs) have demonstrated very promising properties as sources of single photons and entangled photons on-demand. Among different growth methods, droplet etching epitaxy has allowed the growth of almost strain-free QDs, with low and controllable surface densities, small excitonic fine structure splitting (FSS), and fast radiative decays. Here, we extend the local droplet etching technique to In(Ga)As QDs in AlGaAs, thereby increasing…