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Scanning tunneling spectroscopy
About: Scanning tunneling spectroscopy is a research topic. Over the lifetime, 7886 publications have been published within this topic receiving 213828 citations.
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TL;DR: The nanostructures deposited at room temperature in scanning tunneling microscopy experiments are produced by mechanical contact between tip and sample and the resistance can be as low as 100 εOmega.
Abstract: This paper shows that the nanostructures deposited at room temperature in scanning tunneling microscopy experiments are produced by mechanical contact between tip and sample. Gold mounds are deposited in gold substrates and it is observed that the current flowing between tip and sample is quantized and the resistance can be as low as 100 \ensuremath{\Omega}.
465 citations
TL;DR: Low temperature high magnetic field scanning tunneling microscopy and spectroscopy of graphene flakes on graphite that exhibit the structural and electronic properties of graphene decoupled from the substrate are reported.
Abstract: We report low temperature high magnetic field scanning tunneling microscopy and spectroscopy of graphene flakes on graphite that exhibit the structural and electronic properties of graphene decoupled from the substrate. Pronounced peaks in the tunneling spectra develop with increasing field revealing a Landau level sequence that provides a direct way to identify graphene and to determine the degree of its coupling to the substrate. The Fermi velocity and quasiparticle lifetime, obtained from the positions and width of the peaks, provide access to the electron-phonon and electron-electron interactions.
464 citations
IBM1
TL;DR: Scanning tunneling microscopy has been used to determine the atomic structure of the clean Si(001) surface, and buckled and nonbuckled dimers appear to be present in roughly equal amounts, indicating that they have nearly the same energy.
Abstract: Scanning tunneling microscopy has been used to determine the atomic structure of the clean Si(001) surface. The basic structural unit of the reconstruction has been resolved with a lateral resolution of \ensuremath{\sim} 3 \AA{}. Buckled and nonbuckled dimers appear to be present in roughly equal amounts, indicating that they have nearly the same energy. The presence of atomic-scale defects is discussed.
464 citations
TL;DR: The determination of atom positions around Shockley-type partial dislocations at the surface of gold has been achieved by operating a scanning tunneling microscope with atomic resolution on regions containing several unit cells of the stacking-fault reconstruction of this surface.
Abstract: The determination of atom positions around Shockley-type partial dislocations [Burgers vector \( \frac{1}{6}(1,1, - 2)] \)at the (111) surface of gold has been achieved by operating a scanning tunneling microscope with atomic resolution on regions containing several unit cells of the\( (23 \times \sqrt {3} ) \) stacking-fault reconstruction of this surface. The data show directly the occupation of both hexagonal-closepacked and face-centered-cubic sites in the surface layer, verifying earlier reconstruction models.
463 citations
TL;DR: The electronic band gap and dispersion of the occupied electronic bands of atomically precise graphene nanoribbons fabricated via on-surface synthesis are reported on and are in quantitative agreement with theoretical predictions that include image charge corrections accounting for screening by the metal substrate and confirm the importance of electron-electron interactions in graphene nan oribbons.
Abstract: Some of the most intriguing properties of graphene are predicted for specifically designed nanostructures such as nanoribbons. Functionalities far beyond those known from extended graphene systems include electronic band gap variations related to quantum confinement and edge effects, as well as localized spin-polarized edge states for specific edge geometries. The inability to produce graphene nanostructures with the needed precision, however, has so far hampered the verification of the predicted electronic properties. Here, we report on the electronic band gap and dispersion of the occupied electronic bands of atomically precise graphene nanoribbons fabricated via on-surface synthesis. Angle-resolved photoelectron spectroscopy and scanning tunneling spectroscopy data from armchair graphene nanoribbons of width N = 7 supported on Au(111) reveal a band gap of 2.3 eV, an effective mass of 0.21 m0 at the top of the valence band, and an energy-dependent charge carrier velocity reaching 8.2 × 105 m/s in the li...
455 citations