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A fluidic device for continuous on-line inductive sensing of proteolytic cleavages.
Lab Chip
January 2025
Institute of Translational Medicine, Department of Health Sciences and Technology, ETH Zürich, 8092 Zürich, Switzerland.
Proteases, an important class of enzymes that cleave proteins and peptides, carry a wealth of potentially useful information. Devices to enable routine and cost effective measurement of their activity could find frequent use in clinical settings for medical diagnostics, as well as some industrial contexts such as detecting on-line biological contamination. In particular, devices that make use of readouts involving magnetic particles may offer distinct advantages for continuous sensing because material they release can be magnetically captured downstream and their readout is insensitive to optical properties of the sample.
View Article and Find Full Text PDFSpin Drag Mechanism of Giant Thermal Magnetoresistance.
Phys Rev Lett
December 2024
Department of Physics, University of Washington, Seattle, Washington 98195, USA.
We study hydrodynamic thermal transport in high-mobility two-dimensional electron systems placed in an in-plane magnetic field and identify a new mechanism of thermal magnetotransport. This mechanism is caused by drag between the electron populations with opposite spin polarization, which arises in the presence of a hydrodynamic flow of heat. In high mobility systems, spin drag results in strong thermal magnetoresistance, which becomes of the order of 100% at relatively small spin polarization of the electron liquid.
View Article and Find Full Text PDFMagnetochiral charge pumping due to charge trapping and skin effect in chirality-induced spin selectivity.
Nat Commun
January 2025
Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, Israel.
Chirality-induced spin selectivity (CISS) generates giant spin polarization in transport through chiral molecules, paving the way for novel spintronic devices and enantiomer separation. Unlike conventional transport, CISS magnetoresistance (MR) violates Onsager's reciprocal relation, exhibiting significant resistance changes when reversing electrode magnetization at zero bias. However, its underlying mechanism remains unresolved.
View Article and Find Full Text PDFArtificial Control of Giant Converse Magnetoelectric Effect in Spintronic Multiferroic Heterostructure.
Adv Sci (Weinh)
December 2024
Center for Spintronics Research Network, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka, 560-8531, Japan.
To develop voltage-controlled magnetization switching technologies for spintronics applications, a highly (422)-oriented CoFeSi layer on top of the piezoelectric PMN-PT(011) is experimentally demonstrated by inserting a vanadium (V) ultra-thin layer. The strength of the growth-induced magnetic anisotropy of the (422)-oriented CoFeSi layers can be artificially controlled by tuning the thicknesses of the inserted V and the grown CoFeSi layers. As a result, a giant converse magnetoelectric effect (over 10 s m) and a non-volatile binary state at zero electric field are simultaneously achieved in the (422)-oriented CoFeSi/V/PMN-PT(011) multiferroic heterostructure.
View Article and Find Full Text PDFObservation of quantum oscillations near the Mott-Ioffe-Regel limit in CaAs.
Natl Sci Rev
December 2024
State Key Laboratory of Surface Physics and Institute for Nanoelectronic Devices and Quantum Computing, Fudan University, Shanghai 200433, China.
The Mott-Ioffe-Regel limit sets the lower bound of the carrier mean free path for coherent quasiparticle transport. Metallicity beyond this limit is of great interest because it is often closely related to quantum criticality and unconventional superconductivity. Progress along this direction mainly focuses on the strange-metal behaviors originating from the evolution of the quasiparticle scattering rate, such as linear-in-temperature resistivity, while the quasiparticle coherence phenomena in this regime are much less explored due to the short mean free path at the diffusive bound.
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