Now showing items 1238-1257 of 1416

  • 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 Raman linewidths in transition-metal dichalcogenides 

    Srivastava, GP; Thomas, IO (American Physical Society, 2018-07-26)
    Using a semi-ab-initio theoretical method we examine the temperature-dependent linewidth of the Raman modes in bulk and monolayer transition-metal dichalcogenides (TMDs) MoS2, WS2, and MoTe2. It is found that different ...
  • 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 ...
  • Ten eclipsing binaries in the Small Magellanic Cloud: fundamental parameters and Cloud distance 

    Harries, TJ; Hilditch, RW; Howarth, ID (Oxford University Press (OUP) / Royal Astronomical Society, 2003-02-11)
    We present the first results of an observational programme to measure the fundamental parameters of over 100 eclipsing binaries in the Small Magellanic Cloud (SMC). The spectroscopic data have been obtained by using the ...
  • 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 carbon nanotubes and graphene nanoribbons 

    Saroka, VA; Hartmann, RR; Portnoi, ME (Institute of Electrical and Electronics Engineers (IEEE), 2017-10-12)
    Interband dipole transitions are calculated in quasi-metallic single-walled carbon nan-otubes and armchair graphene nanoribbons. It is shown that the curvature effects for tubes and the edge effects for ribbons result not ...
  • 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 ...
  • Testing hydrodynamics schemes in galaxy disc simulations (article) 

    Few, CG; Dobbs, C; Pettitt, A; Konstandin, L (Oxford University Press / Royal Astronomical Society, 2016-05-26)
    We examine how three fundamentally different numerical hydrodynamics codes follow the evolution of an isothermal galactic disc with an external spiral potential. We compare an adaptive mesh refinement code (RAMSES), a ...
  • Testing hydrodynamics schemes in galaxy disc simulations (dataset) 

    Few, CG; Dobbs, C; Pettitt, A; Konstandin, L (University of Exeter, 2018-05-22)
    This is the dataset used for the Few et al. (2016) article "Testing hydrodynamics schemes in galaxy disc simulations" published in Monthly Notices of the Royal Astronomical Society.
  • The dependence of protostar formation on the geometry and strength of the initial magnetic field (dataset) 

    Lewis, Benjamin T.; Bate, Matthew R. (University of Exeter (dataset) / Oxford University Press (paper), 2017-01-30)
    This is the dataset that was used to produce the paper published in MNRAS. Included are the binary dump files from all twelve of the calculations in the paper.
  • Theoretical and experimental exploration of finite sample size effects on the propagation of surface waves supported by slot arrays 

    Camacho, M; Boix, RR; Medina, F; Hibbins, AP; Sambles, JR (American Physical Society, 2017-06-22)
    The propagation of surface waves supported by a finite array of slots perforated on a zero thickness perfect electrically conducting screen is studied both experimentally and theoretically. To generate numerical results, ...