Search Results - "Stamps, Robert L"
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Microscopic origin of level attraction for a coupled magnon-photon system in a microwave cavity
Published in New journal of physics (10-09-2019)“…We discuss various microscopic mechanisms for level attraction in a hybridized magnon-photon system of a ferromagnet in a microwave cavity. The discussion is…”
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2
Narrow Magnonic Waveguides Based on Domain Walls
Published in Physical review letters (19-06-2015)“…The channeling of spin waves with domain walls in ultrathin ferromagnetic films is demonstrated theoretically and through micromagnetics simulations. It is…”
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3
Emergent dynamic chirality in a thermally driven artificial spin ratchet
Published in Nature materials (01-11-2017)“…A structurally chiral two-dimensional array of nanomagnets is shown to thermally relax its magnetization by rotation in a preferential direction, behaving as a…”
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4
Spin-Wave Chirality and Its Manifestations in Antiferromagnets
Published in Physical review letters (25-10-2017)“…As first demonstrated by Tang and Cohen in chiral optics, the asymmetry in the rate of electromagnetic energy absorption between left and right enantiomers is…”
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5
Is the angular momentum of an electron conserved in a uniform magnetic field?
Published in Physical review letters (09-12-2014)“…We show that an electron moving in a uniform magnetic field possesses a time-varying "diamagnetic" angular momentum. Surprisingly this means that the kinetic…”
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6
Vacuum Faraday effect for electrons
Published in New journal of physics (25-10-2012)“…The optical Faraday effect describes the rotation of linear polarization upon propagation through a medium in the presence of a longitudinal magnetic field…”
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7
Superferromagnetism and Domain-Wall Topologies in Artificial “Pinwheel” Spin Ice
Published in ACS nano (15-01-2019)“…For over ten years, arrays of interacting single-domain nanomagnets, referred to as artificial spin ices, have been engineered with the aim to study…”
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8
Parallel axis theorem for free-space electron wavefunctions
Published in New journal of physics (09-09-2015)“…We consider the orbital angular momentum of a free electron vortex moving in a uniform magnetic field. We identify three contributions to this angular…”
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9
Continuous psychophysics for two-variable experiments; A new “Bayesian participant” approach
Published in i-Perception (London) (01-11-2023)“…Interest in continuous psychophysical approaches as a means of collecting data quickly under natural conditions is growing. Such approaches require stimuli to…”
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10
Target motion misjudgments reflect a misperception of the background; revealed using continuous psychophysics
Published in i-Perception (London) (01-11-2023)“…Determining the velocities of target objects as we navigate complex environments is made more difficult by the fact that our own motion adds systematic motion…”
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11
Nanoscale Mapping of the Magnetic Properties of (111)-Oriented La0.67Sr0.33MnO3
Published in Nano letters (09-09-2015)“…Spatially resolved analysis of magnetic properties on the nanoscale remains challenging, yet strain and defects on this length-scale can profoundly affect a…”
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12
Nonreciprocal spin-wave channeling along textures driven by the Dzyaloshinskii-Moriya interaction
Published in Physical review. B, Condensed matter and materials physics (13-06-2014)“…Ultrathin metallic ferromagnets on substrates with strong spin-orbit coupling can exhibit induced chiral interactions of the Dzyaloshinskii-Moriya (DM) form…”
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13
Spin Wave Power Flow and Caustics in Ultrathin Ferromagnets with the Dzyaloshinskii-Moriya Interaction
Published in Physical review letters (04-11-2016)“…The Dzyaloshinskii-Moriya interaction in ultrathin ferromagnets can result in nonreciprocal propagation of spin waves. We examine theoretically how spin wave…”
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14
Ground state search, hysteretic behaviour and reversal mechanism of skyrmionic textures in confined helimagnetic nanostructures
Published in Scientific reports (25-11-2015)“…Magnetic skyrmions have the potential to provide solutions for low-power, high-density data storage and processing. One of the major challenges in developing…”
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15
Reconfigurable wave band structure of an artificial square ice
Published in Physical review. B, Condensed matter and materials physics (18-04-2016)“…Artificial square ices are structures composed of magnetic nanoelements arranged on the sites of a two-dimensional square lattice, such that there are four…”
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16
Artificial spin ice: The unhappy wanderer
Published in Nature physics (01-09-2014)“…Frustration in spin systems can emerge geometrically in the absence of intrinsic energetic degeneracy -- a topologically induced state that can be visualized…”
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17
A simple Hebbian/anti-Hebbian network learns the sparse, independent components of natural images
Published in Neural computation (01-02-2006)“…Slightly modified versions of an early Hebbian/anti-Hebbian neural network are shown to be capable of extracting the sparse, independent linear components of a…”
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18
Configurable Artificial Spin Ice with Site-Specific Local Magnetic Fields
Published in Physical review letters (08-01-2021)“…We demonstrate ground state tunability for a hybrid artificial spin ice composed of Fe nanomagnets which are subject to site-specific exchange-bias fields,…”
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Stray-Field Imaging of a Chiral Artificial Spin Ice during Magnetization Reversal
Published in ACS nano (24-12-2019)“…Artificial spin ices are a class of metamaterials consisting of magnetostatically coupled nanomagnets. Their interactions give rise to emergent behavior, which…”
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20
Exchange bias using a spin glass
Published in Nature materials (01-01-2007)“…Exchange bias is commonly manifested as the hysteresis-loop shift observed when a ferromagnet is in contact with an antiferromagnet. Here, we report…”
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