Electron injection assisted phase transition in a nano-Au-VO2 junction

Gang Xu; C.-M. Huang; Tazawa, Masato; Jin, Ping; D. M. Chen; L. Miao
August 2008
Applied Physics Letters;8/11/2008, Vol. 93 Issue 6, p061911
Academic Journal
The semiconductor-metal transition of vanadium dioxide (VO2) thin films epitaxially grown on C-plane sapphire is studied by depositing Au nanoparticles onto the thermochromic films forming a metal-semiconductor contact, namely, a nano-Au-VO2 junction. It reveals that Au nanoparticles have a marked effect on the reduction in the phase transition temperature of VO2. A process of electron injection in which electrons flow from Au to VO2 due to the lower work function of the metal is believed to be the mechanism. The result may support the Mott–Hubbard phase transition model for VO2.


Related Articles

  • Carrier heating and electron-phonon energy exchange effects on nonlinear transport phenomena in semiconductor films. Gonzalez de la Cruz, G.; Gurevich, Yu. G. // Journal of Applied Physics;Jan2013, Vol. 113 Issue 2, p023504 

    Theory of nonlinear size effects is developed in semiconductor films in the presence of an external dc electric field. The electron and phonon temperatures are calculated self-consistently with the electron-phonon energy interaction taken into account and its influence on the electron current...

  • Sensing the temperature influence on plasmonic field of metal nanoparticles by photoluminescence of fullerene C60 in layered C60/Au system. Yeshchenko, Oleg A.; Bondarchuk, Illya S.; Kozachenko, Viktor V.; Losytskyy, Mykhaylo Yu. // Journal of Applied Physics;2015, Vol. 117 Issue 15, p153102-1 

    Influence of temperature on the plasmonic field in the temperature range of 78-278K was studied employing surface plasmon enhanced photoluminescence from the fullerene C60 thin film deposited on 2D array of Au nanoparticles. It was experimentally found that temperature dependence of plasmonic...

  • Electron-phonon decoupling in the photoresponse of YBaCuO granular films at low temperature. Maneval, J.-P.; Chibane, F. // Applied Physics Letters;7/20/1992, Vol. 61 Issue 3, p339 

    Examines the granular YBaCuO films in current-induced dissipative state. Exposure of the film to light pulses of small fluence; Observation on the decay of the film photoresistance; Resolution of the second decay rate; Identification of the electron-phonon interaction; Determination of the...

  • Effect of electron-phonon energy exchange on thermal wave propagation in semiconductors. Gurevich, Yu. G.; Gonz�lez de la Cruz, G.; Logvinov, G. N.; Kasyanchuk, M. N. // Semiconductors;Nov98, Vol. 32 Issue 11, p1179 

    Nonequilibrium, periodic (in both space and time) temperature distributions in the electron and phonon subsystems of a geometrically bounded semiconductor (thermal waves) are calculated self-consistently with the electron-phonon interaction taken into account. Modulated laser radiation, which is...

  • Properties of Shallow-Level D[sup �]-Centers in Polar Semiconductors. Kashirina, N. I.; Lakhno, V. D.; Sychev, V. V.; Sheinkman, M. K. // Semiconductors;Mar2003, Vol. 37 Issue 3, p302 

    The energy of the lowest singlet and triplet terms of shallow-level D- centers (two electrons bound at a singly charged Coulomb center) in semiconductors with ion bonding is theoretically analyzed. Electron-phonon interaction is described by the Fr�hlich Hamiltonian. The D[sup -]-center...

  • Size Effects on the Electrical Resistivity of the Ultra-Thin Metallic Film. PAJA, A.; DZIAŁO, A. // Acta Physica Polonica, A.;May2014, Vol. 125 Issue 5, p1220 

    In this article we investigate the electron-phonon interaction in metals in the system strongly reduced in one dimension. The Fermi sphere which represents the free-electron structure of a bulk metal was replaced by a discrete set of the Fermi disks. Using the variational expression for...

  • Ultrafast carrier dynamics and radiative recombination in multiferroic BiFeO3 single crystals and thin films. Sheu, Y. M.; Trugman, S. A.; J. Xiong; Park, Y.-S.; S. Lee; H. T. Yi; S.-W. Cheong; Q. X. Jia; Taylor, A. J.; Prasankumar, R. P. // EPJ Web of Conferences;2013, Issue 41, p03018-p.1 

    We report a detailed comparison of ultrafast carrier dynamics in single crystals and thin films of multiferroic BiFeO3 (BFO). Using degenerate femtosecond optical pump-probe spectroscopy, we find that the observed dynamics are qualitatively similar in both samples. After photoexcitation,...

  • Temperature dependent optical properties of Mn doped (Pb,Sr)TiO3 ferroelectric films in absorption region: Electron-phonon interaction. Yang, J.; Gao, Y. Q.; Wu, J.; Huang, Z. M.; Meng, X. J.; Shen, M. R.; Sun, J. L.; Chu, J. H. // Journal of Applied Physics;Dec2010, Vol. 108 Issue 11, p114102 

    The 2 mol % Mn doped Pb0.5Sr0.5TiO3 films were fabricated on sapphire substrates by chemical solution deposition. The complex dielectric functions and optical parameters of the films determined by transmittance spectroscopy in a broad temperature range of 80-500 K were investigated. Apparent...

  • The role of the spin-density wave and disorder in the density of states of sputtered Cr films. Cooke, David W.; Boekelheide, Z.; Queen, D. R.; Hellman, F. // Journal of Applied Physics;Apr2009, Vol. 105 Issue 7, p07C314 

    Chromium plays a key role as a spacer layer in the well-studied landmark giant magnetoresistive (GMR) system, Fe/Cr. In these multilayered structures, most often produced through sputtering, the density of Cr states at the Fe/Cr interface is known to contribute strongly to the spin-dependent...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics