WorldCat Identities

Klapwijk, T.M. (Teunis Martien) 1948-

Overview
Works: 6 works in 14 publications in 2 languages and 41 library holdings
Genres: Academic theses 
Roles: Author, Other, Opponent
Publication Timeline
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Most widely held works by T.M Klapwijk
Superconducting microbridges and radiation-stimulated superconductivity by Teunis Martien Klapwijk Klapwijk( Book )

6 editions published in 1977 in English and Dutch and held by 25 WorldCat member libraries worldwide

Op de grens : over student, kerk en universiteit by Teunis Martien Klapwijk Klapwijk( Book )

3 editions published in 1991 in Dutch and held by 9 WorldCat member libraries worldwide

Schets van de relatie van bijbelgetrouwe studenten (met name van de gereformeerde kerken vrijgemaakt) tot de universiteit en de kerkgemeente en vice versa
Resistance of superconducting nanowires connected to normal-metal leads by G. R Boogaard( )

2 editions published between 2004 and 2007 in English and held by 3 WorldCat member libraries worldwide

Signatures of a 4pi periodic Andreev bound state in topological Josephson junctions by Kévin Le calvez( )

1 edition published in 2017 in English and held by 2 WorldCat member libraries worldwide

Three dimensional topological insulators (3D TI) are a new state of matter composedof an electrically insulating bulk covered by metallic surface states. Theoretically, a topo-logical Josephson junction composed of these surface states can host an Andreev Boundstate (ABS) that has twice the periodicity of the conventional 2p periodic ABSs. The4p periodic ABS is expected to be the building block of topological quantum computing.Therefore, we study the dynamic of this particular ABS by performing Shapiro measure-ment on Josephson junctions built with bismuth based 3D TI.To identify the e?ects of a 4p periodic ABS in a Shapiro measurement, we use a phe-nomenological model that simulates the voltage-current characteristics of a TJJ. We predicttwo signatures of the 4p periodic ABS and estimate their robustness against Joule heatingand thermally activated quasiparticle poisoning of the 4p periodic mode.We study the Josephson junctions dynamics by performing Shapiro measurements onjunctions built on Bi2Se3. We observe the two previously anticipated signatures, whichare the non-conventional appearance order of the Shapiro steps and the remaining of asupercurrent at the closing of the Shapiro step n = 0. They prove the presence of a 4pperiodic ABS.We also study the topological insulator BiSbTeSe2 that we have grown by using themelting growth method. By superconducting interferometric measurements, we show asuperconducting surface transport without bulk electronic conduction
Enige gemengde addities van broom by Teunis Klapwijk( Book )

in Dutch and held by 1 WorldCat member library worldwide

Modulation de la supraconductivité hors équilibre avec un STM by Thomas Jalabert( )

1 edition published in 2020 in English and held by 1 WorldCat member library worldwide

Quasiparticles dynamics often governs the ultimate performances of superconducting devices. Out-of-equilibrium superconductivity has therefore attracted a long-standing interest. In order to probe the microscopic mechanisms at play, injection of quasiparticles with the help of a tunnel junction has already been employed at the mesoscopic scale, thanks to the outstanding progress in modern nanotechnology. However, lithographed tunnel junctions lack spatial resolution and do not allow to vary the bias voltage and the tunneling current independently. In order to overcome these two limitations the novelty of this PhD work is to use a Scanning Tunneling Microscope (STM) working at very low temperature (50 mK) to tune the critical current of superconducting nanowires as a function of the tip position and the tunneling set-point.In thin niobium nanowires capped with gold, we measured a drastic reduction of the critical current by injecting a tunnelling current of quasiparticles that is six orders of magnitude lower. We interpret this observation as a local increase of the electronic temperature. We also suggest that the same mechanism is at play in superconducting Field Effect Transistors (SuFETs). The critical current depends strongly on the injection position along the nanowire, the injection rate and the energy of the quasiparticles. At large energies compared to the superconducting gap, the reduction of the critical current is controlled by the injected power. Our measurements show that the diffusion of heat by quasiparticles and phonons explains the injection power and position dependencies, and allow to probe the electron-phonon coupling in our samples. By contrast, when reducing the energy at constant injection rate, the critical current sharply decreases close to the gap energy, signalling the breakdown of the quasi-equilibrium model. We explain this behaviour as a non Fermi Dirac out of equilibrium energy distribution of the quasiparticles, and this allows to estimate the relaxation rate of the quasiparticles. We also probed the spectral properties of current carrying nanowires, and induced magnetic vortices to create spatial variations in the density of states. We thus evidenced the effect of quasiparticle trapping by vortices at the nanometer scale, which is of particular interest since until now the only experiments that allow investigating the dynamics of an inhomogeneous superconducting system necessarily probed a macroscopic volume of the superconductor, rendering explanation of the measurements in terms of the inhomogeneity difficult.Therefore, this experimental work opens a new perspective to investigate the competition between diffusion, relaxation and recombination of quasiparticles in strongly disordered superconductors with various applications such as in photon detection and superconducting electronics
 
Audience Level
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Audience Level
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Audience level: 0.00 (from 0.00 for Supercondu ... to 0.00 for Supercondu ...)

Alternative Names
Klapwijk, Teunis Martien

Languages
English (9)

Dutch (5)