Searched for: mods_originInfo_publisher_s%3A%22American%255C+Physical%255C+Society%22
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Van Deen, M.S. (author), Simon, J. (author), Zeravcic, Z. (author), Dagois-Bohy, S. (author), Tighe, B.P. (author), Van Hecke, M. (author)We probe the onset and effect of contact changes in soft harmonic particle packings which are sheared quasistatically. We find that the first contact changes are the creation or breaking of contacts on a single particle. We characterize the critical strain, statistics of breaking versus making a contact, and ratio of shear modulus before and...journal article 2014
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Goodrich, C.P. (author), Dagois-Bohy, S. (author), Tighe, B.P. (author), Van Hecke, M. (author), Liu, A.J. (author), Nagel, S.R. (author)Athermal packings of soft repulsive spheres exhibit a sharp jamming transition in the thermodynamic limit. Upon further compression, various structural and mechanical properties display clean power-law behavior over many decades in pressure. As with any phase transition, the rounding of such behavior in finite systems close to the transition...journal article 2014
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Musterd, M. (author), Van Steijn, V. (author), Kleijn, C.R. (author), Kreutzer, M.T. (author)Local contact line pinning prevents droplets from rearranging to minimal global energy, and models for droplets without pinning cannot predict their shape. We show that experiments are much better described by a theory, developed herein, that does account for the constrained contact line motion, using as an example droplets on tilted plates. We...journal article 2014
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Skarsvag, H. (author), Bauer, G.E.W. (author), Brataas, A. (author)We study the dynamics of spin valves consisting of two layers of magnetic insulators separated by a normal metal in the macrospin model. A current through the spacer generates a spin Hall current that can actuate the magnetization via the spin-transfer torque. We derive expressions for the effective Gilbert damping and the critical currents for...journal article 2014
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Reutlinger, J. (author), Glazman, L. (author), Nazarov, Y.V. (author), Belzig, W. (author)The superconducting proximity effect leads to strong modifications of the local density of states in diffusive or chaotic cavity Josephson junctions, which displays a phase-dependent energy gap around the Fermi energy. The so-called minigap of the order of the Thouless energy ETh is related to the inverse dwell time in the diffusive region in...journal article 2014
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Bonaccorsi, S. (author), Ottaviano, S. (author), De Pellegrini, F. (author), Socievole, A. (author), Van Mieghem, P.F.A. (author)We consider a model for the diffusion of epidemics in a population that is partitioned into local communities. In particular, assuming a mean-field approximation, we analyze a continuous-time susceptible-infected-susceptible (SIS) model that has appeared recently in the literature. The probability by which an individual infects individuals in...journal article 2014
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Flipse, J. (author), Dejene, F.K. (author), Wagenaar, D. (author), Bauer, G.E.W. (author), Ben Youssef, J. (author), Van Wees, B.J. (author)We report the observation of the spin Peltier effect (SPE) in the ferrimagnetic insulator yttrium iron garnet (YIG), i.e., a heat current generated by a spin current flowing through a platinum (Pt)|YIG interface. The effect can be explained by the spin transfer torque that transforms the spin current in the Pt into a magnon current in the YIG....journal article 2014
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Idema, T. (author), Liu, A.J. (author)Models that invoke nonlinear wavefront propagation in a chemically excitable medium are rife in the biological literature. Indeed, the idea that wavefront propagation can serve as a signaling mechanism has often been invoked to explain synchronization of developmental processes. In this paper we suggest a kind of signaling based not on diffusion...journal article 2014
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Gillissen, J.J.J. (author), Looije, N. (author)A surface reaction boundary condition in multicomponent lattice Boltzmann simulations is developed. The method is applied to a test case with nonlinear reaction rates and nonlinear density profiles. The results are compared to the corresponding analytical solution, which shows that the error of the method scales with the square of the lattice...journal article 2014
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De Haan, V.O. (author), Plomp, J. (author), Van Well, A.A. (author), Rekveldt, M.T. (author), Hasegawa, Y.H. (author), Dalgliesh, R.M. (author), Steinke, N.J. (author)With a neutron spin-echo reflectometer (OffSpec at ISIS, UK) it is possible to measure the gravitation-induced quantum phase difference between the two spin states of the neutron wave function in a magnetic field. In the small-angle approximation, this phase depends linearly on the inclination angle of the neutron beam with respect to the...journal article 2014
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Miao, X.F. (author), Caron, L. (author), Roy, P. (author), Dung, N.H. (author), Zhang, L. (author), Kockelmann, W.A. (author), De Groot, R.A. (author), Van Dijk, N.H. (author), Brück, E. (author)Neutron-diffraction experiments on the (Mn,Fe)2(P,Si)-type compounds have shown a site preference of Si atoms in the hexagonal structure. The degree of ordering of Si depends on the Si/P ratio, while it is independent of the Mn/Fe ratio. The ferromagnetic-paramagnetic magnetoelastic transition is closely related to the size of the magnetic...journal article 2014
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Schuetz, M.J.A. (author), Kessler, E.M. (author), Vandersypen, L.M.K. (author), Cirac, J.I. (author), Giedke, G. (author)We theoretically study the nuclear spin dynamics driven by electron transport and hyperfine interaction in an electrically defined double quantum dot in the Pauli-blockade regime. We derive a master-equation-based framework and show that the coupled electron-nuclear system displays an instability towards the buildup of large nuclear spin...journal article 2014
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Diez, M. (author), Dahlhaus, J.P. (author), Wimmer, M.T. (author), Beenakker, C.W.J. (author)The fractal spectrum of magnetic minibands (Hofstadter butterfly), induced by the moiré superlattice of graphene on a hexagonal crystal substrate, is known to exhibit gapped Dirac cones. We show that the gap can be closed by slightly misaligning the substrate, producing a hierarchy of conical singularities (Dirac points) in the band structure at...journal article 2014
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Kamra, A. (author), Schreier, M. (author), Huebl, H. (author), Goennenwein, T.B. (author)We present a generic theoretical model for torque differential magnetometry (TDM)—an experimental method for determining the magnetic properties of a magnetic specimen by recording the resonance frequency of a mechanical oscillator, on which the magnetic specimen has been mounted, as a function of the applied magnetic field. The effective...journal article 2014
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Yokoyama, T. (author), Eto, M. (author), Nazarov, Y.V. (author)We investigate theoretically the Josephson junction of semiconductor nanowire with strong spin-orbit (SO) interaction in the presence of magnetic field. By using a tight-binding model, the energy levels En of Andreev bound states are numerically calculated as a function of phase difference ? between two superconductors in the case of short...journal article 2014
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Cator, E. (author), Van Mieghem, P.F.A. (author)By invoking the famous Fortuin, Kasteleyn, and Ginibre (FKG) inequality, we prove the conjecture that the correlation of infection at the same time between any pair of nodes in a network cannot be negative for (exact) Markovian susceptible-infected-susceptible (SIS) and susceptible-infected-removed (SIR) epidemics on networks. The truth of the...journal article 2014
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Van de Bovenkamp, R. (author), Kuipers, F.A. (author), Van Mieghem, P.F.A. (author)When two viruses compete for healthy nodes in a simple network and both spreading rates are above the epidemic threshold, only one virus will survive. However, if we prevent the viruses from dying out, rich dynamics emerge. When both viruses are identical, one virus always dominates the other, but the dominating and dominated virus alternate. We...journal article 2014
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Brüning, B.A. (author), Farago, B. (author)We report a combined dynamic light scattering and neutron spin-echo (NSE) study on vesicles composed of the phospholipid 1,2-dimyristoyl-sn-glycero-3-phosphatidylcholine under the influence of varying amounts of perfluorooctanoic acid. We study local lipid bilayer undulations using NSE on time scales up to 200 ns. Similar to the effect evoked by...journal article 2014
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Shi, L. (author), Hakala, T.K. (author), Rekola, H.T. (author), Martikainen, J.P. (author), Moerland, R.J. (author), Törmä, P. (author)We study spatial coherence properties of a system composed of periodic silver nanoparticle arrays covered with a fluorescent organic molecule (DiD) film. The evolution of spatial coherence of this composite structure from the weak to the strong coupling regime is investigated by systematically varying the coupling strength between the localized...journal article 2014
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Melnikov, K. (author), Kreilos, T. (author), Eckhardt, B.E. (author)We study the stability of coherent structures in plane Couette flow against long-wavelength perturbations in wide domains that cover several pairs of coherent structures. For one and two pairs of vortices, the states retain the stability properties of the small domains, but for three pairs new unstable modes are found. They are shown to be...journal article 2014
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