[PDF] Elastic And Inelastic Scanning Tunneling Spectroscopy On Iron Sased Superconductors eBook

Author : Schackert, Michael Peter
Publisher : KIT Scientific Publishing
Page : 148 pages
File Size : 25,8 MB
Release : 2015-03-23
Category : Physics
ISBN : 3731502380

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This work describes the experimental study of electron-boson interactions in superconductors by means of inelastic electron tunneling spectroscopy performed with a scanning tunneling microscope (STM) at temperatures below 1 K. This new approach allows the direct measurement of the Eliashberg function of conventional superconductors as demonstrated on lead (Pb) and niobium (Nb). Preparative experiments on unconventional iron-pnictides are presented in the end.

Author : T. Wolfram
Publisher : Springer Science & Business Media
Page : 247 pages
File Size : 26,76 MB
Release : 2012-12-06
Category : Technology & Engineering
ISBN : 3642812287

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Inelastic Electron Tunneling Spectroscop~ or lETS, provides a unique technique for electronically monitoring the vibrational modes of molecul (;5 adsorbed on a metal oxide surface. Since the discovery of the phenomena by JAKLEVIC and LM1BE in 1966, lETS has been developed by a number of scientists as a method for studying the surface chemistry of molecular species adsorbed on aluminum oxide. Recent applications of lETS include investigations of physical and chemical adsorption of hydrocarbons, studies of catalysis by metal particles, detection and identification of trace substances in air and water, and studies of biological molecules and electron damage to such molecules. lETS has been employed to investigate adhesive materials, and studies are currently in prog ress to investigate corrosion species and corrosion inhibitors on aluminum and its alloys. Electronic transitions of molecules have also been studied by lETS. The recent development of the "external doping" technique, whereby molecu lar species can be introduced into fabricated tunnel junctions, opens the door for a vast new array of surface chemical studies by lETS. lETS is rap idly becoming an important tool for the study of surface and interface phe nomena. In addition to its role in surface studies, inelastic tunneling has proved extremely valuable for the study of the electronic properties of thin metallic films, and the recent discovery of light emission from inelastic tunneling promises to be of some importance in the area of device physics.

Author : Gozlinski, Thomas
Publisher : KIT Scientific Publishing
Page : 208 pages
File Size : 29,12 MB
Release : 2023-03-24
Category : Science
ISBN : 3731512793

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Complementary to scattering techniques, scanning tunnelling microscopy provides atomic-scale real space information about a material's electronic state of matter. State-of-the-art designs of a scanning tunnelling microscope (STM) allow measurements at millikelvin temperatures with unprecedented energy resolution. Therefore, this instrument excels in probing the superconducting state at low temperatures and especially its local quasiparticle excitations as well as bosonic degrees of freedom.

Author : Skolaut, Julian
Publisher : KIT Scientific Publishing
Page : 164 pages
File Size : 36,10 MB
Release : 2023-09-14
Category :
ISBN : 3731512475

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This work presents a single molecular motor driven by the current in an STM. Its chiral functional group is supposed to perform a rotation in a preferred direction, proven by Binomial tests to be statistically significant. The rotation is proposedly driven by the chiral-induced spin selectivity effect (CISS). However, the studies of the rotation on the dependence on the lateral tip position, voltage and current indicate that he CISS is unlikely to cause the preferred rotation direction.

Author : Wildermuth, Matthias Micha
Publisher : KIT Scientific Publishing
Page : 160 pages
File Size : 27,25 MB
Release : 2023-09-11
Category :
ISBN : 373151303X

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In the last decades, superconducting devices have emerged as a promising platform for quantum technologies, including quantum sensing and quantum computing. Their key elements are Josephson junctions, which allow for coherent supercurrent tunneling between two weakly linked superconductors. If such a junction is extended in one direction to a long junction, the superconducting phase difference can vary in space and time and may allow for quantized phase windings that drive supercurrent vortices.

Author : Schneider, Andre
Publisher : KIT Scientific Publishing
Page : 170 pages
File Size : 46,37 MB
Release : 2021-06-04
Category : Science
ISBN : 3731510324

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Quantum sensing is a vast and emerging field enabling in-situ studies of quantum systems and hence the development of quantum hybrid systems. This work creates the fundament of direct superconducting-magnetic hybrid systems by developing a local microwave sensing scheme and studying the influence of a static magnetic field on a superconducting qubit. Finally, a proof-of-principle hybrid system is demonstrated, which opens the path towards superconducting-magnetic quantum circuits.

Author : Rai, Vibhuti Narayan
Publisher : KIT Scientific Publishing
Page : 150 pages
File Size : 38,34 MB
Release : 2022-10-04
Category : Science
ISBN : 3731512017

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In this work, a clear pathway is presented to achieve well-defined electronically decoupled chromophores from metallic leads without requiring additional insulating layers. To study such self-decoupled molecules, STM equipped with an efficient light detection setup has been used. Results show that the chromophores mounted on tripodal molecular platforms adsorbed on a gold surface present well-defined and efficient electroluminescence down to the single-molecule level.