Now showing items 625-644 of 720

  • Temperature dependence of the acoustoelectric current in graphene 

    Bandhu, Lokeshwar; Nash, Geoffrey R. (AIP Publishing, 2014-12-29)
    The acoustoelectric current in graphene has been investigated as a function of temperature, surface acoustic wave (SAW) intensity, and frequency. At high SAW frequencies, the measured acoustoelectric current decreases with ...
  • Temperature dependence of the breakdown of the quantum Hall effect studied by induced currents 

    Matthews, A.J.; Kavokin, K.V.; Usher, Alan; Portnoi, M.E.; Zhu, M.; Gething, J.D.; Elliott, Martin; Herrenden-Harker, W.G.; Phillips, K.; Ritchie, D.A.; Simmons, M.Y.; Sorensen, C.B.; Hansen, O.P.; Mironov, O.A.; Myronov, M.; Leadley, D.R.; Henini, M. (American Physical Society, 2004)
    We have developed a model of the high-current breakdown of the integer quantum Hall effect, as measured in contactless experiments using a highly-sensitive torsion balance magnetometer. The model predicts that, for empirically ...
  • Temperature dependence of the interface moments in Co2MnSi thin films 

    Telling, N.D.; Keatley, Paul Steven; Shelford, L.R.; Arenholz, E.; van der Laan, Gerrit; Hicken, R.J.; Sakuraba, Y.; Tsunegi, S.; Oogane, M.; Ando, Y.; Takanashi, K.; Miyazaki, T. (American Institute of Physics, 2008-05-12)
    X-ray magnetic circular dichroism (XMCD) is utilized to explore the temperature dependence of the interface moments in Co2MnSi (CMS) thin films capped with aluminum. By increasing the thickness of the capping layer, we ...
  • Temperature spatially offset Raman spectroscopy (T-SORS): subsurface chemically specific measurement of temperature in turbid media using anti-Stokes spatially offset Raman Spectroscopy. 

    Gardner, Benjamin; Matousek, Pavel; Stone, Nicholas (American Chemical Society, 2016-01-05)
    Here we propose and demonstrate a new analytical method for the noninvasive measurement of subsurface temperatures within diffusely scattering (turbid) media in combination with high chemical selectivity. The method is ...
  • Temperature-dependent resistivity of suspended graphene 

    Mariani, Eros; von Oppen, Felix (American Physical Society, 2010)
    In this paper we investigate the electron-phonon contribution to the resistivity of suspended single layer graphene. In-plane as well as flexural phonons are addressed in different temperature regimes. We focus on the ...
  • Temperature-pressure profile of the hot Jupiter HD 189733b from HST sodium observations: Detection of upper atmospheric heating 

    Huitson, Catherine M.; Sing, David K.; Vidal-Madjar, A.; Ballester, G.; Lecavelier des Etangs, A.; Desert, J.-M.; Pont, F. (Oxford University Press on behalf of the Royal Astronomical Society, 2012)
    We present transmission spectra of the hot Jupiter HD 189733b taken with the Space Telescope Imaging Spectrograph (STIS) aboard Hubble Space Telescope (HST). The spectra cover the wavelength range 5808–6380 Å with a resolving ...
  • Temporal variations in the evaporating atmosphere of the exoplanet HD 189733b 

    Lecavelier des Etangs, A.; Bourrier, V.; Wheatley, P.J.; Dupuy, H.; Ehrenreich, D.; Vidal-Madjar, A.; Hebrard, G.; Ballester, G.; Desert, J.-M.; Ferlet, R.; Sing, David K. (EDP Sciences for European Southern Observatory (ESO), 2012)
    Atmospheric escape has been detected from the exoplanet HD 209458b through transit observations of the hydrogen Lyman-α line. Here we present spectrally resolved Lyman-α transit observations of the exoplanet HD 189733b at ...
  • Terahertz applications of carbon nanotubes 

    Portnoi, M.E.; Kibis, O.V.; Rosenau da Costa, M. (Elsevier, 2008)
    We formulate and justify several proposals utilizing unique electronic properties of carbon nanotubes for a broad range of applications to THz optoelectronics, including THz generation by hot electrons in quasi-metallic ...
  • Terahertz emission spectroscopy of laser-induced spin dynamics in TmFeO3 and ErFeO3 orthoferrites 

    Mikhaylovskiy, Rostislav; Hendry, Euan; Kruglyak, V.V.; Pisarev, R.V.; Rasing, T.; Kimel, A.V. (American Physical Society, 2014)
    Using the examples of laser-induced spin-reorientation phase transitions in TmFeO3 and ErFeO3 orthoferrites, we demonstrate that terahertz emission spectroscopy can obtain novel information about ultrafast laser-induced ...
  • Terahertz modulation of the Faraday rotation by laser pulses via the optical Kerr effect 

    Subkhangulov, RR; Mikhaylovskiy, RV; Zvezdin, AK; Kruglyak, VV; Rasing, T; Kimel, AV (Nature Publishing Group, 2016-01-04)
    The magneto-optical Faraday effect played a crucial role in the elucidation of the electromagnetic nature of light. Today it is powerful means to probe magnetism and the basic operational principle of magneto-optical ...
  • Terahertz processes in carbon nanotubes 

    Batrakov, K.G.; Kibis, O.V.; Kuzhir, P.P.; Rosenau da Costa, M.; Portnoi, M.E. (SPIE - Society of Photo-Optical Instrumentation Engineers, 2010)
    We investigated several proposals utilizing the unique electronic properties of carbon nanotubes (CNTs) for a broad range of applications to THz optoelectronics, including THz generation by Cerenkov-type emitters based on ...
  • Terahertz science and technology of carbon nanomaterials 

    Hartmann, Richard R.; Kono, J.; Portnoi, M.E. (IOP Publishing, 2014)
    The diverse applications of terahertz (THz) radiation and its importance to fundamental science makes finding ways to generate, manipulate and detect THz radiation one of the key areas of modern applied physics. One approach ...
  • Terahertz transitions in quasi-metallic carbon nanotubes 

    Hartmann, Richard R.; Portnoi, M.E. (Institute of Physics Publishing, 2015-06-10)
    We study interbanddipole transitions across curvature-induced narrow gaps in quasi-metallic single-walled carbon nanotubes. The curvature effects not only open a gap in the nanotube energy spectrum but also allow optical ...
  • Theoretical investigation of superconductivity in SrPd2Ge2, SrPd2As2, and CaPd2As2 

    Karaca, E; Tütüncü, HM; Uzunok, HY; Srivastava, G.P.; Uçsur (American Physical Society, 2016-02-04)
    © 2016 American Physical Society. Ab initio pseudopotential calculations have been performed to investigate the structural, electronic, and vibrational properties of SrPd2Ge2, SrPd2As2, and CaPd2As2 crystallizing in the ...
  • Theoretical limits on magnetic field strengths in low-mass stars 

    Browning, Matthew K.; Weber, M; Chabrier, G.; Massey, AP (American Astronomical Society, 2016-02-18)
    Observations have suggested that some low-mass stars have larger radii than predicted by 1-D structure models. Some theoretical models have invoked very strong interior magnetic fields (of order 1 MG or more) as a possible ...
  • Theory of anyon excitons: Relation to excitons of nu =1/3 and nu =2/3 incompressible liquids 

    Portnoi, M.E.; Rashba, E.I. (American Physical Society, 1996)
    Elementary excitations of incompressible quantum liquids (IQL’s) are anyons, i.e., quasiparticles carrying fractional charges and obeying fractional statistics. To find out how the properties of these exotic quasiparticles ...
  • Theory of ferromagnetic microswimmers 

    Gilbert, Andrew D.; Ogrin, Feodor Y.; Petrov, Peter G.; Winlove, C. Peter (Oxford University Press, 2011)
    This paper considers the dynamics of a microscale swimmer based on two magnetic beads that are elastically coupled together. A time-varying external magnetic field is imposed that has two principal effects: one is to exert ...
  • Theory of interface and anharmonic phonon interactions in nanocomposite materials 

    Thomas, IO; Srivastava, G.P. (IOP Publishing:, 2014-01-01)
    We present a theory of phonon scattering rates resulting from mass smudging across interfaces and from anharmonicity in nanocomposite materials. We discuss the derivation of the anharmonic scattering term and present some ...
  • Thermal energies of classical and quantum damped oscillators coupled to reservoirs 

    Philbin, TG; Anders, J (Cornell University, 2015-12-08)
    We consider the global thermal state of classical and quantum harmonic oscillators that interact with a reservoir. Ohmic damping of the oscillator can be exactly treated with a 1D scalar field reservoir, whereas general ...
  • Thermodynamics of discrete quantum processes 

    Anders, Janet; Giovannetti, V (IOP Publishing Ltd and Deutsche Physikalische Gesellschaft, 2013-03-18)
    We define thermodynamic configurations and identify two primitives of discrete quantum processes between configurations for which heat and work can be defined in a natural way. This allows us to uncover a general second ...