Topic
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: This study shows the feasibility of a bistable single molecule switch on an insulator by scanning tunneling microscopy and a reversible isomerization between a planar trans and a three-dimensional cis form with two different thresholds.
Abstract: Scanning tunneling microscopy is used to investigate isomerization of amino-nitro-azobenzene on a thin NaCl layer on Ag(111) by inelastically tunneling electrons. A reversible isomerization between a planar trans and a three-dimensional cis form with two different thresholds is demonstrated. The isomerization characteristics are rationalized in terms of binding of the multipolar molecule to the ionic layer. This study shows the feasibility of a bistable single molecule switch on an insulator.
71 citations
TL;DR: In this article, the electron transport properties of n-decylamine-functionalized Si nanosheets (NSs) were characterized using atomic force microscopy with a conductive cantilever under vacuum conditions at room temperature.
Abstract: We have characterized the electron transport properties of n-decylamine-functionalized Si nanosheets (NSs) using atomic force microscopy with a conductive cantilever under vacuum conditions at room temperature. Electrons are transported from the cantilever to the substrate through Si NSs. The Si NSs exhibit nonresonant tunneling; the transport mechanisms are based on direct tunneling at low bias voltages and Fowler–Nordheim tunneling at high bias voltages.
70 citations
IBM1
TL;DR: In this paper, the photon assisted tunneling of electrons from aluminum into the SiO2 conduction band was observed for the first time using argon and krypton lasers.
70 citations
TL;DR: In this paper, an ellipsoidal mirror and a lens system are used to collect and detect photons from the tip-surface region of an STM in UHV.
Abstract: The analysis of photons emitted from the tip–surface region of an STM has produced new information on local dissipative processes in tunneling. A key objective to extend our work to a general spectroscopic and microscopic method is to collect and detect photons as efficiently as possible and here we describe our experimental arrangements, one of which incorporates an ellipsoidal mirror and the other a lens system to collect the photons. The systems operate in UHV and have in situ sample and tip transfer facilities. Examples of a variety of photon spectroscopy modes including photon spectra, isochromat spectra, angular distributions, and photon mapping are presented.
70 citations
TL;DR: In this article, the structure and electronic states on the (100) surface of reduced BaTiO3 single crystals were observed by scanning tunneling microscopy and spectroscopy.
Abstract: Structure and electronic states on the (100) surface of reduced BaTiO3 single crystals were observed by scanning tunneling microscopy and spectroscopy. After annealing at 1150 °C, the direction of the edges ordered to run along the equivalents of [011] and [001] directions. All the observed step edges were of unit‐cell height. On each terrace atomlike corrugation with the periodicity multiples of the √5×√5 R26.6° superlattice was observed in the filled state images. A straightforward method to deduce the local density of states from the scanning tunneling spectroscopy data was introduced, based on multiplication of an inverted triangular transfer matrix, and was applied to the scanning tunneling spectroscopy data on the terraces. The amplitude of the local density of states at EF−1 eV varied in phase with the atomlike corrugation on the terrace, which was consequently ascribed to electronic states at the spatially ordered Ti 3d–oxygen vacancy complexes on the surface.
70 citations