Institut Néel

Domain‐Wall Circulation Gating and Pinning via Compositional Engineering of Cylindrical Nanowires

ABSTRACT Spintronic devices based on cylindrical magnetic nanowires have been proposed as a route toward three–dimensional (3D) information storage and processing by harnessing the controlled motion of domain walls (DWs). In this geometry, the Bloch‐point wall (BPW) is the charac...

Geometry-enforced topological chiral fermions in amorphous chiral metals

Since the prediction and observation of topological Weyl semimetals (chiral TSMs), there have been enormous efforts to characterize further condensed matter realizations of chiral fermions. These efforts were dramatically accelerated by the subsequent discovery of a profound link...

Arrival-Time Distributions as a Probe of the Preferred Foliation in Relativistic Bohmian Mechanics

Relativistic extensions of de Broglie–Bohm theory postulate a preferred foliation of spacetime, an additional structure essential for defining simultaneous configurations on Minkowski spacetime but conventionally believed to be empirically undetectable at quantum equilibrium. In...

On the Cl2 plasma etching mechanisms of AlN micropillars: Carrier wafer impact

Plasma etching of aluminum nitride (AlN) is a critical step in the fabrication of advanced optoelectronic and electronic devices, particularly deep-ultraviolet light-emitting diodes based on nanowire architectures. In research and development, small AlN samples are commonly mount...

Microsecond-pulsed nanocalorimetry: a scalable approach for ultrasensitive heat capacity measurements

Abstract We introduce a nanocalorimetric technique based on microsecond-pulsed heating (µs-PHnC) that enables high-sensitivity, quasi-isothermal heat capacity measurements on nanoscale samples. Such resolution is critical for exploring thermodynamic signatures in low-dimensional...

InN Nanowires on Si⟨111⟩ and Si⟨100⟩ for Monolithic Short-Wave Infrared (SWIR) Photodetectors

Abstract InN nanowires were grown on Si⟨111⟩ and Si⟨100⟩ substrates by plasma-assisted molecular beam epitaxy using a thin AlN buffer layer at temperatures compatible with the thermal budget limitation imposed by back-end-of-line processing. Reflection high-energy electron diffra...

Over 400 V Field‐Plate Enhanced Vertical Diamond Schottky Diodes With Near‐Ideal Behavior and Over 2700 A/cm 2 Current Density

Vertical diamond Schottky barrier diodes with field‐plate edge termination were fabricated on 1.5 μm low‐doped () epilayers grown on heavily boron‐doped substrates. Devices with Schottky radii of 25–350 μm and FP lengths of 0–20 μm were systematically characterized. Temperature‐d...

Universal bound on microwave dissipation in superconducting circuits

Improving the coherence of superconducting qubits is essential for advancing quantum technologies. While superconductors are theoretically perfect conductors, they consistently exhibit residual energy dissipation when driven by microwave currents, limiting coherence times. Here,...

Magnetic Field Tuning of Modulated Magnetic Orders in CrOCl at the Two‐Dimensional Limit

Chromium oxychloride is a van der Waals magnet with intrinsic competing exchange interactions, including a strong antiferromagnetic one, source of a very rich magnetic phase diagram, with ferrimagnetic, antiferromagnetic, and canted states, up to high magnetic fields. We investig...

Indistinguishable single photons from a quantum dot in a nanopost cavity

Wavelength-tunable sources of single photons are key devices for scaling up optical quantum technologies. In this context, individual quantum dots (QDs) embedded in broadband photonic nanostructures are particularly appealing. The nanopost cavity, which is built with a segment of...