All Outputs (54)

X-Ray Magnetic Circular Dichroism in Altermagnetic α-MnTe (2024)
Journal Article

Altermagnetism is a recently identified magnetic symmetry class combining characteristics of conventional collinear ferromagnets and antiferromagnets, that were regarded as mutually exclusive, and enabling phenomena and functionalities unparalleled i... Read More about X-Ray Magnetic Circular Dichroism in Altermagnetic α-MnTe.

Thermally stable Peltier controlled vacuum chamber for electrical transport measurements (2024)
Journal Article

The design, manufacture, and characterization of an inexpensive, temperature-controlled vacuum chamber with millikelvin stability for electrical transport measurements at and near room temperature is reported. A commercially available Peltier device... Read More about Thermally stable Peltier controlled vacuum chamber for electrical transport measurements.

On-chip phonon-magnon reservoir for neuromorphic computing (2023)
Journal Article

Reservoir computing is a concept involving mapping signals onto a high-dimensional phase space of a dynamical system called “reservoir” for subsequent recognition by an artificial neural network. We implement this concept in a nanodevice consisting o... Read More about On-chip phonon-magnon reservoir for neuromorphic computing.

Electrical control of 180° domain walls in an antiferromagnet (2023)
Journal Article

We demonstrate the reversible current-induced motion of 180° antiferromagnetic domain walls in a CuMnAs device. By controlling the magnitude and direction of the current pulse, the position of a domain wall can be switched between three distinct pinn... Read More about Electrical control of 180° domain walls in an antiferromagnet.

Antiferromagnetic half-skyrmions electrically generated and controlled at room temperature (2023)
Journal Article

Topologically protected magnetic textures are promising candidates for information carriers in future memory devices, as they can be efficiently propelled at very high velocities using current-induced spin torques. These textures—nanoscale whirls in... Read More about Antiferromagnetic half-skyrmions electrically generated and controlled at room temperature.

Experimental electronic structure of the electrically switchable antiferromagnet CuMnAs (2023)
Journal Article

Tetragonal CuMnAs is a room temperature antiferromagnet with an electrically reorientable Néel vector and a Dirac semimetal candidate. Direct measurements of the electronic structure of single-crystalline thin films of tetragonal CuMnAs using angle-r... Read More about Experimental electronic structure of the electrically switchable antiferromagnet CuMnAs.

Probing the manipulation of antiferromagnetic order in CuMnAs films using neutron diffraction (2022)
Journal Article

We describe measurements of the uniaxial magnetic anisotropy and spin-flop rotation of the Néel vector in antiferromagnetic CuMnAs thin films using neutron diffraction. The suppression of the magnetic (100) peak under magnetic fields is observed for... Read More about Probing the manipulation of antiferromagnetic order in CuMnAs films using neutron diffraction.

Optically Gated Terahertz-Field-Driven Switching of Antiferromagnetic CuMnAs (2021)
Journal Article

We show scalable and complete suppression of the recently reported terahertz-pulse-induced switching between different resistance states of antiferromagnetic CuMnAs thin films by ultrafast gating. The gating functionality is achieved by an optically... Read More about Optically Gated Terahertz-Field-Driven Switching of Antiferromagnetic CuMnAs.

Performance evaluation of a new 30 ?m thick GaAs X-ray detector grown by MBE (2021)
Journal Article

A circular mesa (400 μm diameter) GaAs p+-i-n+ photodiode with a 30 μm thick i layer was characterized for its performance as a detector in photon counting x-ray spectroscopy at 20 °C. The detector was fabricated from material grown by molecular beam... Read More about Performance evaluation of a new 30 ?m thick GaAs X-ray detector grown by MBE.

Protected Long-Distance Guiding of Hypersound Underneath a Nanocorrugated Surface (2021)
Journal Article

In nanoscale communications, high-frequency surface acoustic waves are becoming effective data carriers and encoders. On-chip communications require acoustic wave propagation along nanocorrugated surfaces which strongly scatter traditional Rayleigh w... Read More about Protected Long-Distance Guiding of Hypersound Underneath a Nanocorrugated Surface.

Additively manufactured ultra-high vacuum chamber for portable quantum technologies (2021)
Journal Article

© 2021 Additive manufacturing is having a dramatic impact on research and industry across multiple sectors, but the production of additively manufactured systems for ultra-high vacuum applications has so far proved elusive and widely been considered... Read More about Additively manufactured ultra-high vacuum chamber for portable quantum technologies.

Magnetism and magnetoresistance in the critical region of a dilute ferromagnet (2021)
Journal Article

We present detailed experimental measurements and simulations of the field-dependent magnetization and magnetoresistance in the vicinity of the Curie temperature in the highly disordered dilute ferromagnetic semiconductor (Ga,Mn)As. The observed depe... Read More about Magnetism and magnetoresistance in the critical region of a dilute ferromagnet.

Quenching of an antiferromagnet into high resistivity states using electrical or ultrashort optical pulses (2020)
Journal Article

Antiferromagnets are of potential use in the development of spintronic devices due to their ultrafast dynamics, insensitivity to external magnetic fields and absence of magnetic stray fields. Similar to their ferromagnetic counterparts, antiferromagn... Read More about Quenching of an antiferromagnet into high resistivity states using electrical or ultrashort optical pulses.

Magneto-Seebeck microscopy of domain switching in collinear antiferromagnet CuMnAs (2020)
Journal Article

Antiferromagnets offer spintronic device characteristics unparalleled in ferromagnets owing to their lack of stray fields, THz spin dynamics, and rich materials landscape. Microscopic imaging of antiferromagnetic domains is one of the key prerequisit... Read More about Magneto-Seebeck microscopy of domain switching in collinear antiferromagnet CuMnAs.

Investigation of magnetic anisotropy and heat dissipation in thin films of compensated antiferromagnet CuMnAs by pump–probe experiment (2020)
Journal Article

We recently reported on a method to determine the easy axis position in a 10 nm thick film of the fully compensated antiferromagnet CuMnAs. The film had a uniaxial magnetic anisotropy and the technique utilized a magneto-optical pump and probe experi... Read More about Investigation of magnetic anisotropy and heat dissipation in thin films of compensated antiferromagnet CuMnAs by pump–probe experiment.

Low-energy switching of antiferromagnetic CuMnAs/GaP using sub-10 nanosecond current pulses (2020)
Journal Article

The recently discovered electrical-induced switching of antiferromagnetic (AF) materials that have spatial inversion asymmetry has enriched the field of spintronics immensely and opened the door for the concept of antiferromagnetic memory devices. Cu... Read More about Low-energy switching of antiferromagnetic CuMnAs/GaP using sub-10 nanosecond current pulses.

Temporal superoscillations of subterahertz coherent acoustic phonons (2020)
Journal Article

We observe coherent acoustic phonon superoscillations at subterahertz frequencies. The superoscillations result from the interference of optically excited coherent longitudinal acoustic phonon modes in a GaAs/AlGaAs superlattice. The superoscillation... Read More about Temporal superoscillations of subterahertz coherent acoustic phonons.

Temporal superoscillation of sub-terahertz coherent acoustic phonons (2020)
Journal Article

We observe coherent acoustic phonon superoscillations at sub-terahertz frequencies. The superoscillations result from the interference of optically excited coherent longitudinal acoustic phonon modes in a GaAs/AlGaAs superlattice. The superoscillatio... Read More about Temporal superoscillation of sub-terahertz coherent acoustic phonons.

Spin flop and crystalline anisotropic magnetoresistance in CuMnAs (2020)
Journal Article

We report magnetic-field-induced rotation of the antiferromagnetic Néel vector in epitaxial CuMnAs thin films. First, using soft x-ray magnetic linear dichroism spectroscopy as well as magnetometry, we demonstrate spin-flop switching and continuous s... Read More about Spin flop and crystalline anisotropic magnetoresistance in CuMnAs.

Gating effects in antiferromagnetic CuMnAs (2019)
Journal Article

Antiferromagnets (AFs) attract much attention due to their potential applications in spintronics. Both the electric current and the electric field are considered as tools suitable to control the properties and the Néel vector direction of AFs. Among... Read More about Gating effects in antiferromagnetic CuMnAs.