The dielectric response of the H2Ti3O7 nanotube investigated by valence electron energy loss spectroscopy

Wang, Juan; Li, Quan; Peng, L.-M.; Malac, Marek
January 2009
Applied Physics Letters;1/5/2009, Vol. 94 Issue 1, p011915
Academic Journal
The dielectric response of an anisotropic nanostructure, individual H2Ti3O7 nanotube with ∼8–10 nm diameter, has been investigated using both momentum transfer dependent and spatially resolved valence electron energy loss spectroscopies. The dielectric response of an individual nanotube is found to be dominated by several surface related excitations and defect states, although its basic electronic structure (such as the band gap and single electron interband transitions) is similar to that of TiO2. The possible origins of the surface excitations in such a tubular structure are also discussed.


Related Articles

  • Anisotropy of the magnetic properties and the electronic structure of transition-metal diborides. Fedorchenko, A. V.; Grechnev, G. E.; Panfilov, A. S.; Logosha, A. V.; Svechkarev, I. V.; Filippov, V. B.; Lyashchenko, A. B.; Evdokimova, A. V. // Low Temperature Physics;Nov2009, Vol. 35 Issue 11, p862 

    The temperature dependences of the magnetic susceptibility χ and its anisotropy Δχ=χ∥-χ⊥ have been measured for hexagonal single crystals of transition-metal diborides MB2 (M=Sc,Ti,V,Zr,Hf) in the temperature interval 4.2–300 K. It is found that the...

  • Capturing EELS in the reciprocal space. Hébert, C.; Alkauskas, A.; Löffler, S.; Jouffrey, B.; Schattschneider, P. // European Physical Journal - Applied Physics;Jun2011, Vol. 54 Issue 3, pN.PAG 

    In this work two aspects of momentum-dependent electron energy loss spectrometry are studied, both in the core-loss and in the low-loss region. In the case of core losses, we focus on the demonstration and the interpretation of an unexpected non-Lorentzian behavior in the angular part of the...

  • Anisotropic momentum transfer in low-dimensional electron systems in a magnetic field. Kibis, O. V. // JETP Letters;10/25/97, Vol. 66 Issue 8, p588 

    In low-dimensional systems with an asymmetric quantizing potential, an asymmetric electron energy spectrum [variant_greek_epsilon](p)?[variant_greek_epsilon](-p), where p is the electron momentum, arises in the presence of a magnetic field. A consequence of such an energy spectrum is that...

  • Spin transfer in nanomagnetic devices with perpendicular anisotropy. Hao Meng; Jian-Ping Wang // Applied Physics Letters;4/24/2006, Vol. 88 Issue 17, p172506 

    Spin momentum transfer in a nanomagnetic device with perpendicular magnetic anisotropy for both free and fixed magnetic layers is studied. The perpendicular anisotropy is induced by using CoFe/Pt multilayer. The magnetoresistive loop shows that the perpendicular switching fields for the free and...

  • New developments in the model potential method: ScO molecule. Andzelm, Jan; Radzio, Elżbieta; Barandiarán, Zoila; Seijo, Luis // Journal of Chemical Physics;11/1/1985, Vol. 83 Issue 9, p4565 

    An extension of Huizinaga’s model potential method is presented and applied to the study of the equilibrium geometry of the ground electronic state of ScO. In the extended model potential method (EMP) the exchange interaction between the outer core and valence shells are handled more...

  • The Anion and Cation Effects in the Magnetic Anisotropy of Rare-Earth Compounds: Charge Screening by Conduction Electrons. Irkhin, Yu. P.; Irkhin, V. Yu. // Physics of the Solid State;Jun2000, Vol. 42 Issue 6, p1087 

    The formation of magnetic anisotropy (MA) in rare-earth compounds with transition metals has been analyzed. The screening of the charges creating the crystal field by conduction electrons has been shown to play an important role. The calculations took into account the Friedel charge-density...

  • Conduction mechanisms in some graphite-polymer composites: Effects of temperature and hydrostatic... Celzard, A.; McRae, E.; Marêché, J. F.; Furdin, G.; Sundqvist, B. // Journal of Applied Physics;2/1/1998, Vol. 83 Issue 3, p1410 

    Examines the conduction mechanisms involved in some highly electrically anisotropic resin-graphite particle composites. Details on the experiments conducted; Analysis of the resistivity versus temperature behavior; Results of this study.

  • High-field thermal noise of holes in silicon: The effect of valence band anisotropy. Hinckley, J. M.; Singh, J. // Journal of Applied Physics;12/15/1996, Vol. 80 Issue 12, p6766 

    Presents a study which investigated the effects of valence band anisotropy on longitudinal and transverse high-field differential mobilities, diffusivities and thermal noise temperatures. Types of noise semiconductor devices; Relationship between the shape and valence band characteristics;...

  • Calculation of turbulent momentum transfer in a solid phase based on equations for the second and third moments of particle-velocity pulsations. Rokhman, B. // Journal of Engineering Physics & Thermophysics;Mar2007, Vol. 80 Issue 2, p273 

    A chain of transfer equations for the second and third moments of dispersed-phase-velocity pulsations in the anisotropic field of energy of random particle motion is obtained based on the computational procedure developed. The interphase and interparticle interactions are allowed for. The...


Read the Article


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

Try another library?
Sign out of this library

Other Topics