TITLE

Surface states and origin of the Fermi level pinning on nonpolar [formula] surfaces

AUTHOR(S)
Ivanova, L.; Borisova, S.; Eisele, H.; Dähne, M.; Laubsch, A.; Ebert, Ph.
PUB. DATE
November 2008
SOURCE
Applied Physics Letters;11/10/2008, Vol. 93 Issue 19, p192110
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
[formula] cleavage surfaces were investigated by cross-sectional scanning tunneling microscopy and spectroscopy. It is found that both the N and Ga derived intrinsic dangling bond surface states are outside of the fundamental band gap. Their band edges are both located at the [formula] point of the surface Brillouin zone. The observed Fermi level pinning at 1.0 eV below the conduction band edge is attributed to the high step and defect density at the surface but not to intrinsic surface states.
ACCESSION #
35514282

 

Related Articles

  • Low-frequency vibrational spectrum of a KYb(MoO4)2 crystal. Bondar', N. S.; Poperezhai, S. N.; Kut'ko, V. I. // Low Temperature Physics;Apr2010, Vol. 36 Issue 4, p317 

    The long-wavelength IR transmission spectra of a KYb(MoO4)2 crystal in the spectral range 10–40 cm-1 at low temperatures T=6 K are measured in polarized light. Two vibrational modes with energies 16.8 cm-1 (E∥a) and 25.3 cm-1 (E∥c) are found. The structure of the low-frequency...

  • Electronic Spectra of Iron Pnictide Superconductors: Influence of Multi-orbitals Hopping and Hund's Coupling. Rani, Luxmi; Ajay // Journal of Superconductivity & Novel Magnetism;Mar2013, Vol. 26 Issue 3, p527 

    We present a theoretical study of the electronic spectral function of iron-pnictide superconductors like LaFeAs(O, F) material. We have attempted two-band tight-binding model Hamiltonian containing various orbitals hopping energies, intra- and inter-band electronic correlations and Hund's...

  • Band Structure and Optical Properties of the Layered Hg3TeCl4 Crystal. Sznajder, M.; Bercha, D. M.; Potera, P.; Khachapuridze, A.; Panko, V. V.; Bercha, S. A. // Acta Physica Polonica, A.;Nov2009, Vol. 116 Issue 5, p950 

    First experimental investigations on absorption and photoluminescence of the novel Hg3TeCl4 monocrystals grown by the Bridgman method are reported. A comparison of the measurement results with theoretical band structure calculations of the Hg3TeCl4 crystal confirmed that Hg3TeCl4 is a...

  • The formation and electronic properties of hydrogenated bilayer silicene from first-principles. Wang Rui; Wang Shaofeng; Wu Xiaozhi // Journal of Applied Physics;2014, Vol. 116 Issue 2, p024303-1 

    Density-functional calculations of the formation and electronic properties of bilayer silicene and hydrogenated bilayer silicene are present. The structure optimization and phonon calculations are carried out to demonstrate that bilayer silicene has stable structure with AB stacking and...

  • Construction of a dynamical matrix for an HCP crystal using phonon data at the symmetry points of the Brillouin zone and elastic constants. Vaks, V. G.; Khromov, K. Yu. // Journal of Experimental & Theoretical Physics;Mar2008, Vol. 106 Issue 3, p495 

    General analytical expressions are obtained for the dynamical matrix D(k) and the elastic constants C ik in an HCP crystal in terms of the Born-von Karman (BvK) parameters. An analytical method is proposed for constructing D(k) on the basis of data about the phonon frequencies ? i ( N) at the...

  • Wave and defect dynamics in nonlinear photonic quasicrystals. Freedman, Barak; Bartal, Guy; Segev, Mordechai; Lifshitz, Ron; Christodoulides, Demetrios N.; Fleischer, Jason W. // Nature;4/27/2006, Vol. 440 Issue 7088, p1166 

    Quasicrystals are unique structures with long-range order but no periodicity. Their properties have intrigued scientists ever since their discovery and initial theoretical analysis. The lack of periodicity excludes the possibility of describing quasicrystal structures with well-established...

  • Spin-wave eigenmodes of an infinite thin film with periodically modulated exchange bias field. Bayer, C.; Kostylev, M. P.; Hillebrands, B. // Applied Physics Letters;3/13/2006, Vol. 88 Issue 11, p112504 

    We calculate semianalytically the spin-wave eigenmodes and frequencies of an infinite thin film with periodically modulated exchange bias field. We show that both localized and propagating modes exist in this system and that band gaps exist at the edges of the Brillouin zone. The spin-wave...

  • High Pressure Study on The Phonon Spectra in Hafnium Nitrides. Gupta, Sanjay D.; Gupta, Sanjeev K.; Jha, Prafulla K. // AIP Conference Proceedings;7/16/2011, Vol. 1349 Issue 1, p865 

    We report ab initio calculations of the phonon spectra for hafnium nitride (HfN) at ambient and high pressures. The calculation of phonon density of states using the density functional perturbation theory including external perturbations like strains and electric fields in periodic systems...

  • A modified version of the Methfessel-Paxton method. Gordienko, A.; Filippov, S. // Russian Physics Journal;Jul2009, Vol. 52 Issue 7, p668 

    A modified version of the method for calculating integrals over the Brillouin zone, which relies on the use of the orthogonal function series, is discussed. It is shown that adoption of the system of Chebyshev’s polynomials makes it possible, while retaining all the advantages of the...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

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

Try another library?
Sign out of this library

Other Topics