Journal ArticleDOI
Electron Resonances in Sharp Tips and Their Role in Tunneling Spectroscopy
A. L. Vázquez de Parga,O. S. Hernán,Rodolfo Miranda,A. Levy Yeyati,N. Mingo,A. Martín-Rodero,Fernando Flores +6 more
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TLDR
In this article, the influence of the shape and electronic structure of the tip in scanning tunneling spectroscopy is studied by a combined theoretical and experimental approach, and it is shown that a sharp W tip exhibits, in contrast with blunt tips, narrow resonant states around the Fermi level.Abstract:
The influence of the shape and electronic structure of the tip in scanning tunneling spectroscopy is studied by a combined theoretical and experimental approach. Tunneling conductance spectra of a Cu(111) surface are used to detect and characterize the electronic states of W tips. The characteristic tunneling conductance of the Cu(111) surface state is the only feature present in spectra recorded with a blunt tip, while spectra obtained with sharp tips display also tip resonances. By means of a self-consistent tight-binding model of realistic tip structures we show that a sharp W tip exhibits, in contrast with blunt tips, narrow resonant states around the Fermi level.read more
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Tight-binding simulation of current-carrying nanostructures
TL;DR: In this article, the authors introduced the tight binding approach to the modeling of electrical conduction in small structures and derived different equivalent forms of the tight-binding expression for the electrical current in a nanoscale junction.
Journal ArticleDOI
Functionalized carbon nanotubes and device applications
Salim Ciraci,Sefa Dag,Taner Yildirim,Oguz Gulseren,Ramazan Tuğrul Senger,Ramazan Tuğrul Senger +5 more
TL;DR: In this article, the authors examine selected physical properties of bare carbon nanotubes, and then study how the mechanical and electronic properties of different tubes can be modified by radial strain, structural defects and adsorption of foreign atoms and molecules.
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STM-theory: Image potential, chemistry and surface relaxation
TL;DR: In this paper, a critical review of the different methods used nowadays for calculating tunneling currents and STM-images is presented with a special emphasis on the role played by the interface image potential and the interaction between the tip and the sample at short distances.
Journal ArticleDOI
Atomic structure of Cu2O(111)
TL;DR: In this paper, an angle-resolved PES (ARPES) was used to analyze the band structure of the metal oxides Cu2O, ZnO and Fe3O4 and their interaction with water and sulfur dioxide.
Journal ArticleDOI
Current-driven dynamics in molecular-scale devices
TL;DR: In this article, the qualitative physics underlying current-triggered dynamics is discussed and placed in context with several well-studied phenomena with which it shares aspects, and a theory for modelling these dynamics is formulated within a time-dependent scattering approach.
References
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Book
Handbook of the Band Structure of Elemental Solids
TL;DR: In this article, the authors propose a spin-orbit coupling for Harrison's theory of the diamond structure of groups III and IV of free-electron-like metals.