Magnetosome chains in magnetotactic bacteria present ideal nanomagnonic model systems for studying collective resonance modes of dipolar-coupled single domain particles in relation to their spatial arrangement. Using microresonator-based ferromagnetic resonance (FMR) spectroscopy, electron microscopy, and micromagnetic modeling, we here provide ins...
We report the topology-mediated modulation of a twisted domain wall speed in a thick perpendicularly magnetized system. By exploiting the topological robustness of the direction of the Bloch wall component in the twisted domain wall, we show that the domain wall speed either increases or decreases depending on whether the transverse magnetic field ...
Roughly, 50% of primary energy worldwide is rejected as waste heat over a wide range of temperatures. Waste heat above 573 K has the highest Carnot potential ( > 50 % ) to be converted to electricity due to higher Carnot efficiency. Thermoelectric (TE) materials have gained significant attention as potential candidates for efficient thermal energy ...
We present the requirements, design, and evaluation of the cryogenic continuously rotating half-wave plate (CHWP) for the Simons Observatory (SO). SO is a cosmic microwave background polarization experiment at Parque Astronómico de Atacama in northern Chile that covers a wide range of angular scales using both small (⌀0.42 m) and large (⌀6 m) apert...
Visualizing micro- and nano-scale biological entities requires high-resolution imaging and is conventionally achieved via optical microscopic techniques. Optical diffraction limits their resolution to ∼200 nm. This limit can be overcome by using ions with ∼1 MeV energy. Such ions penetrate through several micrometers in tissues, and their much shor...
Most semiconductors exhibit a saturation of free carriers when heavily doped with extrinsic dopants. This carrier saturation or “doping limit” is known to be related to the formation of native compensating defects, which, in turn, depends on the energy positions of their conduction band minimum and valence band maximum. Here, we carried out a syste...
A single radio frequency bucket of the 88-Inch Cyclotron is filled using a fast chopper located in the axial line. The bucket then accelerates until it reaches the deflector, at which point, it is extracted as a train of bunches. This phenomenon can be attributed to the characteristic multi-turn extraction of the cyclotron and, by simplifying the c...
The atmosphere and its dynamics are hard to model. Predicting how it evolves, at all altitudes, plays an important part in our everyday life for aspects such as meteorology, but it also becomes more and more crucial concerning optical communications with the Earth’s near space, where a lot of artificial satellites have been launched. This region, c...
Ligand-gated ion channels play an important role in electrochemical signal transduction across diverse organisms, yet their structural and functional intricacies are not fully understood. Particularly lacking is the knowledge of their response to variations in pH, an aspect necessary for understanding their physiological relevance and potential the...
Atmospheric CO2 levels have increased significantly from 280 PPM (pre-industrial) to over 420PPM in 2023. Meeting the climate goals of the Paris Agreement will require active removal strategies and interest in carbon capture and utilization solutions has increased significantly in recent years. The literature primarily focuses on the maximum carbon...
