Searched for: mods_originInfo_publisher_s%3A%22American%255C+Physical%255C+Society%22
(41 - 60 of 1,267)
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Roy, S. (author), Ushakova, K. (author), Van den Berg, Q. (author), Pereira, S.F. (author), Urbach, H.P. (author)A fast noninvasive method based on scattering from a focused radially polarized light to detect and localize subwavelength nanoparticles on a substrate is presented. The technique relies on polarization matching in the far field between scattered and spurious reflected fields. Results show a localization uncertainty of ?10?4?2 is possible for a...journal article 2015
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De Leeuw, A.W. (author), Onishchenko, O. (author), Duine, R.A. (author), Stoof, H.T.C. (author)We investigate the superfluid–Mott-insulator transition of a two-dimensional photon gas in a dye-filled optical microcavity and in the presence of a periodic potential. We show that in the random-phase approximation the effects of the dye molecules, which generally lead to dissipation in the photonic system, can be captured by two dimensionless...journal article 2015
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Cavalli, A. (author), Musterd, M. (author), Mugele, F. (author)The ability to trap or deflect sliding drops is of great interest in microfluidics, as it has several technological applications, ranging from self-cleaning and fog harvesting surfaces to laboratory-on-a-chip devices. We present a three-dimensional numerical model that describes sliding droplets interacting with wetting defects of variable...journal article 2015
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Misiorny, M. (author), Burzuri, E. (author), Gaudenzi, R. (author), Park, K. (author), Leijnse, M. (author), Wegewijs, M.R. (author), Paaske, J. (author), Cornia, A. (author), Van der Zant, H.S.J. (author)By means of electronic transport, we study the transverse magnetic anisotropy of an individual Fe4 singlemolecule magnet (SMM) embedded in a three-terminal junction. In particular, we determine in situ the transverse anisotropy of the molecule from the pronounced intensity modulations of the linear conductance, which are observed as a function...journal article 2015
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Agundez Mojarro, R.R. (author), Salfi, J. (author), Rogge, S. (author), Blaauboer, M. (author)We study the effect of disorder in strongly interacting small atomic chains. Using the Kotliar-Ruckenstein slave-boson approach, we diagonalize the Hamiltonian via scattering matrix theory. We numerically solve the Kondo transmission and the slave-boson parameters that allow us to calculate the Kondo temperature. We demonstrate that in the weak...journal article 2015
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Yibole, H. (author), Guillou, F. (author), Caron, L. (author), Jimenez, E. (author), De Groot, F.M.F. (author), Roy, P. (author), De Groot, R. (author), Van Dijk, N.H. (author), Brück, E. (author)A strong electronic reconstruction resulting in a quenching of the Fe magnetic moments has recently been predicted to be at the origin of the giant magnetocaloric effect displayed by Fe2P-based materials. To verify this scenario, x-ray magnetic circular dichroism experiments have been carried out at the L edges of Mn and Fe for two typical...journal article 2015
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Berta, M. (author), Coles, P.J. (author), Wehner, S.D.C. (author)Heisenberg's uncertainty principle implies that if one party (Alice) prepares a system and randomly measures one of two incompatible observables, then another party (Bob) cannot perfectly predict the measurement outcomes. This implication assumes that Bob does not possess an additional system that is entangled to the measured one; indeed, the...journal article 2014
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Scarlino, P. (author), Kawakami, E. (author), Stano, P. (author), Shafiei, M. (author), Reichl, C. (author), Wegscheider, W. (author), Vandersypen, L.M.K. (author)We report that the electron spin-relaxation time T1 in a GaAs quantum dot with a spin-1/2 ground state has a 180° periodicity in the orientation of the in-plane magnetic field. This periodicity has been predicted for circular dots as being due to the interplay of Rashba and Dresselhaus spin orbit contributions. Different from this prediction, we...journal article 2014
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Lashgari, I. (author), Picano, F. (author), Breugem, W.P. (author), Brandt, L. (author)The aim of this Letter is to characterize the flow regimes of suspensions of finite-size rigid particles in a viscous fluid at finite inertia. We explore the system behavior as a function of the particle volume fraction and the Reynolds number (the ratio of flow and particle inertia to viscous forces). Unlike single-phase flows, where a clear...journal article 2014
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Palacios, E. (author), Rodriguez-Velamazan, J.A. (author), Evangelisti, M. (author), McIntyre, G.J. (author), Lorusso, G. (author), Visser, D. (author), De Jongh, L.J. (author), Boatner, L.A. (author)The magnetic ordering structure of GdPO4 is determined at T=60 mK by the diffraction of hot neutrons with wavelength ?=0.4696 Å. It corresponds to a noncollinear antiferromagnetic arrangement of the Gd moments with propagation vector k=(1/2,0,1/2). This arrangement is found to minimize the dipole-dipole interaction and the crystal-field...journal article 2014
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Wapenaar, C.P.A. (author)In time-reversal acoustics, waves recorded at the boundary of a strongly scattering medium are sent back into the medium to focus at the original source position. This requires that the medium can be accessed from all sides. We discuss a focusing method for media that can be accessed from one side only. We show how complex focusing functions,...journal article 2014
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Kamra, A. (author), Witek, F.P. (author), Meyer, S. (author), Huebl, H. (author), Geprägs, S. (author), Gross, R. (author), Bauer, G.E.W. (author), Goennenwein, S.T.B. (author)We measure the low-frequency thermal fluctuations of pure spin current in a platinum film deposited on yttrium iron garnet via the inverse spin Hall effect (ISHE)-mediated voltage noise as a function of the angle ? between the magnetization and the transport direction. The results are consistent with the fluctuation-dissipation theorem in terms...journal article 2014
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Wang, S.Z. (author), Xia, K. (author), Bauer, G.E.W. (author)We compute the thermoelectric transport parameterized by the Seebeck coefficient and thermal/electric conductance of random-alloy FeCo/MgO/FeCo(001) magnetic tunnel junctions (MTJs) from first principles using a generalized Landauer-Büttiker formalism. The thermopower is found to be typically smaller than those of Fe/MgO/Fe(001) MTJs. The ...journal article 2014
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Thomas, S. (author), Kohstall, C. (author), Kruit, P. (author), Hommelhoff, P. (author)We discuss the effect of semitransparency in a quantum-Zeno-like interaction-free measurement setup, a quantum-physics based approach that might significantly reduce sample damage in imaging and microscopy. With an emphasis on applications in electron microscopy, we simulate the behavior of probe particles in an interaction-free measurement...journal article 2014
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Qu, B. (author), Li, Q. (author), Havlin, S. (author), Stanley, E. (author), Wang, H. (author)Dynamic social opinion models have been widely studied on undirected networks, and most of them are based on spin interaction models that produce a consensus. In reality, however, many networks such as Twitter and the World Wide Web are directed and are composed of both unidirectional and bidirectional links. Moreover, from choosing a coffee...journal article 2014
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Hudl, M. (author), Campanini, D. (author), Caron, L. (author), Höglin, V. (author), Sahlberg, M. (author), Nordblad, P. (author), Rydh, A. (author)The specific heat and thermodynamics of Fe2P single crystals around the first-order paramagnetic to ferromagnetic (FM) phase transition at TC?217K are empirically investigated. The magnitude and direction of the magnetic field relative to the crystal axes govern the derived H?T phase diagram. Strikingly different phase contours are obtained for...journal article 2014
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Van Heck, B. (author), Mi, S. (author), Akhmerov, A.R. (author)We show how the superconducting phase difference in a Josephson junction may be used to split the Kramers degeneracy of its energy levels and to remove all the properties associated with time-reversal symmetry. The superconducting phase difference is known to be ineffective in two-terminal short Josephson junctions, where irrespective of the...journal article 2014
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Joibari, F.K. (author), Blanter, Y.M. (author), Bauer, G.E.W. (author)Nonresonant circularly polarized electromagnetic radiation can exert torques on magnetizations by the inverse Faraday effect (IFE). Here, we discuss the enhancement of IFE by spin-orbit interactions. We illustrate the principle by studying a simple generic model system, i.e., the quasi-one-dimensional ring in the presence of linear/cubic Rashba...journal article 2014
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Jarolimek, K. (author), De Groot, R.A. (author), De Wijs, G.A. (author), Zeman, M. (author)Quantum wells (QWs) are nanostructures consisting of alternating layers of a low and high band-gap semiconductor. The band gap of QWs can be tuned by changing the thickness of the low band-gap layer, due to quantum confinement effects. Although this principle is well established for crystalline materials, there is still controversy for QWs...journal article 2014
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Chiba, T. (author), Bauer, G.E.W. (author), Takahashi, S. (author)We formulate a theory of the ac spin Hall magnetoresistance in a bilayer system consisting of a magnetic insulator such as yttrium iron garnet and a heavy metal such as platinum. We derive expressions for the dc voltage generation based on the drift-diffusion spin model and quantum mechanical boundary condition at the interface that reveal a...journal article 2014
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