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Author: Peter, Moritz
Publisher: KIT Scientific Publishing
ISBN: 3731504103
Category : Physics
Languages : en
Pages : 164
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Book Description
The present work introduces a new concept for magnetic resonance measurements in the GHz regime inside a scanning tunneling microscope. It is based on heterodyne detection in a spin-polarized tunneling barrier. The experimental requirements, including a new method to suppress transmission effects, are explained. Measurements on three model systems which were studied to validate the new technique are presented and compared to simulations.
Author: Peter, Moritz
Publisher: KIT Scientific Publishing
ISBN: 3731504103
Category : Physics
Languages : en
Pages : 164
Get Book Here
Book Description
The present work introduces a new concept for magnetic resonance measurements in the GHz regime inside a scanning tunneling microscope. It is based on heterodyne detection in a spin-polarized tunneling barrier. The experimental requirements, including a new method to suppress transmission effects, are explained. Measurements on three model systems which were studied to validate the new technique are presented and compared to simulations.
Author: Moritz Peter
Publisher:
ISBN: 9781013281310
Category : Science
Languages : en
Pages : 156
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Book Description
The present work introduces a new concept for magnetic resonance measurements in the GHz regime inside a scanning tunneling microscope. It is based on heterodyne detection in a spin-polarized tunneling barrier. The experimental requirements, including a new method to suppress transmission effects, are explained. Measurements on three model systems which were studied to validate the new technique are presented and compared to simulations. This work was published by Saint Philip Street Press pursuant to a Creative Commons license permitting commercial use. All rights not granted by the work's license are retained by the author or authors.
Author: Chen, Jinjie
Publisher: KIT Scientific Publishing
ISBN: 3731508192
Category : Molecules
Languages : en
Pages : 146
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Book Description
We worked on different magnetic molecules containing 3d and 4f magnetic centers. Their growth on metallic surfaces, topographies, spin states, magnetic properties and electron transport were locally investigated by using scanning tunneling microscopy (STM) at temperatures down to 30mK. The main achievement of this dissertation reveals the abrupt switching of crystal fields during formation of molecular contacts.
Author: Zhang, Lei
Publisher: KIT Scientific Publishing
ISBN: 386644950X
Category : Science
Languages : en
Pages : 116
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Book Description
Author: Maerkl, Junji Tobias
Publisher: KIT Scientific Publishing
ISBN: 3731504359
Category : Physics
Languages : en
Pages : 114
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Book Description
In this work, magnetic atoms on surfaces are studied with low-temperature scanning tunneling microscopy. Motivated by the idea to use single atoms as magnetic bits, the factors that allow or prevent long-term stability of their magnetic moments are investigated. Lifetimes of up to several minutes can be achieved for the magnetic moments of holmium atoms on a Pt(111) surface, resulting from the combined symmetries of the system. Corresponding theoretical calculations are presented and evaluated.
Author: Skolaut, Julian
Publisher: KIT Scientific Publishing
ISBN: 3731512475
Category :
Languages : en
Pages : 164
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Book Description
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: Rai, Vibhuti Narayan
Publisher: KIT Scientific Publishing
ISBN: 3731512017
Category : Science
Languages : en
Pages : 150
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Book Description
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.
Author: Gozlinski, Thomas
Publisher: KIT Scientific Publishing
ISBN: 3731512793
Category : Science
Languages : en
Pages : 208
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Book Description
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: Jandke, Jasmin Maria
Publisher: KIT Scientific Publishing
ISBN: 3731507471
Category : Physics
Languages : en
Pages : 242
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Book Description
Within this work, the pairing mechanism of conventional (Pb) and unconventional superconductors (SrFe2(As1-xPx )2 , FeSe, FeSe/STO) was investigated experimentally by means of elastic and inelastic tunneling spectroscopy at temperatures down to 30 mK. The distinction between elastic and inelastic contributions to tunneling data was elaborated. The results help to identify conventional (phonon-mediated) and unconventional (e.g. spin-?uctuation mediated) superconductivity.
Author: Wildermuth, Matthias Micha
Publisher: KIT Scientific Publishing
ISBN: 373151303X
Category :
Languages : en
Pages : 160
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Book Description
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.
