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Konstadinou, M. (author), Herrier, G. (author), Stoutjesdijk, T. (author), Losma, F. (author), Zwanenburg, C. (author), Dobbe, R. (author)This study aimed to assess the suitability of lime treatment for use in dikes in the Netherlands. The effect of this technique on the behavior of a Dutch clay was addressed by comparing the detailed response of lime-treated and natural samples at different lime contents (1.25% and 2.25%) and curing periods. A series of laboratory tests...journal article 2023
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Ridderbos, Joost (author), Braun, M. (author), de Vries, F.K. (author), Shen, J. (author), Li, Ang (author), Kölling, S. (author), Verheijen, Marcel A. (author), Brinkman, Alexander (author), van der Wiel, Wilfred G. (author), Bakkers, E.P.A.M. (author), Zwanenburg, Floris A. (author)We show a hard superconducting gap in a Ge-Si nanowire Josephson transistor up to in-plane magnetic fields of 250 mT, an important step toward creating and detecting Majorana zero modes in this system. A hard gap requires a highly homogeneous tunneling heterointerface between the superconducting contacts and the semiconducting nanowire. This...journal article 2020
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Konstadinou, M. (author), Bezuijen, A. (author), Greeuw, G. (author), Zwanenburg, C. (author), van Essen, H. M. (author), Voogt, L. (author)A series of undrained cyclic direct simple shear (CDSS) tests on dense Toyoura sand has been performed with the aim to investigate the influence of the stiffness of the DSS device on test results. To this end, springs were installed to reduce deliberately the stiffness of the apparatus. It is shown that the cyclic resistance of the sand...journal article 2020
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Breedeveld, J. (author), Zwanenburg, C. (author), Van, M. (author), Lengkeek, H.J. (author)Levees in the Netherlands have traditionally been constructed from soil. Climate change and land subsidence require heightening and/or reinforcing these existing levees. Traditional reinforcements demand additional space, which in some cases conflicts with existing buildings. Applying sheet pile walls in levees allows for strengthening while...conference paper 2019
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Jommi, C. (author), Muraro, S. (author), Trivellato, Edoardo (author), Zwanenburg, C. (author)Direct observation of gas in peat layers, generated by slow degradation in anoxic conditions, raised concern in the Netherlands about its potential impact on the geotechnical response of dykes founded on peat. To address this issue, an experimental investigation was initiated, aimed at quantifying the main consequences of the presence of gas...journal article 2019
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Ridderbos, Joost (author), Brauns, Matthias (author), Li, Ang (author), Bakkers, E.P.A.M. (author), Brinkman, Alexander (author), Van Der Wiel, Wilfred G. (author), Zwanenburg, Floris A. (author)We present a Josephson junction based on a Ge-Si core-shell nanowire with transparent superconducting Al contacts, a building block which could be of considerable interest for investigating Majorana bound states, superconducting qubits, and Andreev (spin) qubits. We demonstrate the dc Josephson effect in the form of a finite supercurrent...journal article 2019
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Froning, F. N.M. (author), Rehmann, M. K. (author), Ridderbos, J. (author), Brauns, M. (author), Zwanenburg, F. A. (author), Li, A. (author), Bakkers, E.P.A.M. (author), Zumbühl, D. M. (author), Braakman, F. R. (author)We report highly tunable control of holes in Ge/Si core/shell nanowires. We demonstrate the ability to create single quantum dots of various sizes, with low hole occupation numbers and clearly observable excited states. For the smallest dot size, we observe indications of single-hole occupation. Moreover, we create double and triple tunnel...journal article 2018
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de Vries, F.K. (author), Shen, J. (author), Skolasinski, R.J. (author), Nowak, M.P. (author), Varjas, D. (author), Wang, L. (author), Wimmer, M.T. (author), Zwanenburg, F.A. (author), Li, A. (author), Kölling, S. (author), Verheijen, M.P.A.M. (author), Bakkers, E.P.A.M. (author), Kouwenhoven, Leo P. (author)Low dimensional semiconducting structures with strong spin-orbit interaction (SOI) and induced superconductivity attracted great interest in the search for topological superconductors. Both the strong SOI and hard superconducting gap are directly related to the topological protection of the predicted Majorana bound states. Here we explore the...journal article 2018
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Brauns, Matthias (author), Ridderbos, Joost (author), Li, Ang (author), Van Der Wiel, Wilfred G. (author), Bakkers, E.P.A.M. (author), Zwanenburg, Floris A. (author)We define single quantum dots of lengths varying from 60 nm up to nearly half a micron in Ge-Si core-shell nanowires. The charging energies scale inversely with the quantum dot length between 18 and 4 meV. Subsequently, we split up a long dot into a double quantum dot with a separate control over the tunnel couplings and the electrochemical...journal article 2016
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Brauns, Matthias (author), Ridderbos, Joost (author), Li, Ang (author), Bakkers, E.P.A.M. (author), Zwanenburg, Floris A. (author)We present angle-dependent measurements of the effective g factor g in a Ge-Si core-shell nanowire quantum dot. g is found to be maximum when the magnetic field is pointing perpendicularly to both the nanowire and the electric field induced by local gates. Alignment of the magnetic field with the electric field reduces g significantly. g is...journal article 2016
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Brauns, Matthias (author), Ridderbos, Joost (author), Li, Ang (author), Bakkers, E.P.A.M. (author), Van Der Wiel, Wilfred G. (author), Zwanenburg, Floris A. (author)We present measurements on gate-defined double quantum dots in Ge-Si core-shell nanowires, which we tune to a regime with visible shell filling in both dots. We observe a Pauli spin blockade and can assign the measured leakage current at low magnetic fields to spin-flip cotunneling, for which we measure a strong anisotropy related to an...journal article 2016
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Zwanenburg, F.A. (author), Dzurak, A.S. (author), Morello, A. (author), Simmons, M.Y. (author), Hollenberg, L.C.L. (author), Klimeck, G. (author), Rogge, S. (author), Coppersmith, S.N. (author), Eriksson, M.A. (author)This review describes recent groundbreaking results in Si, Si/SiGe, and dopant-based quantum dots, and it highlights the remarkable advances in Si-based quantum physics that have occurred in the past few years. This progress has been possible thanks to materials development of Si quantum devices, and the physical understanding of quantum effects...journal article 2013
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Mueller, F. (author), Schouten, R.N. (author), Brauns, M. (author), Gang, T. (author), Lim, W.H. (author), Lai, N.S. (author), Dzurak, A.S. (author), Van der Wiel, W.G. (author), Zwanenburg, F.A. (author)We report the characterisation of printed circuit boards (PCB) metal powder filters and their influence on the effective electron temperature which is as low as 22 mK for a quantum dot in a silicon MOSFET structure in a dilution refrigerator. We investigate the attenuation behaviour (10 MHz–20 GHz) of filter made of four metal powders with a...journal article 2013
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Zwanenburg, C. (author), Van Duinen, A. (author), Rozing, A. (author)Dit rapport is het concept Technisch Rapport macrostabiliteit bij Dijken (TRMD). In dit technisch rapport worden benodigde stappen gegeven die nodig zijn om een uitspraak over de macrostabiliteit van dijken en dammen dijk te kunnen geven. Hierbij wordt ingegaan op de verschillende faalmechanismen, bepaling van de belastingen. Tevens wordt...report 2013
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Bezuijen, A. (author), Van Beek, V.M. (author), Van den Ham, G.A. (author), Zwanenburg, C. (author)Three on-going dike safety studies (on: macro stability, piping and flow slides) in the Netherlands make use of geotechnical physical models. A short outline of these projects is presented; the physical models chosen are described and discussed. The three studies use different physical models, depending on the research questions at the beginning...conference paper 2012
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Zwanenburg, C. (author)Stability assessment of existing dikes build on soft soil generates questions on the available stability calculation techniques and material models. Especially peat behaviour is not easily captured by standard design methods. This has led to disapproval, based on calculations, of dikes that have been in operation for several hundreds of years....conference paper 2012
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Hesami, F. (author), Zwanenburg, C. (author)Centraal in dit rapport staat de stabiliteit van erosiekanalen die ontstaan bij het pipingproces. De stabiliteit van erosiekanalen is belangrijk bij het begrijpen van het pipingproces onder bestaande dijken en daarmee voor de toetsing van waterkeringen op piping. Indien de erosiekanalen niet worden dicht gedrukt kan accumulatie van erosie bij...report 2009
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Zwanenburg, F.A. (author), Van Loon, A.A. (author), Steele, G.A. (author), Rijmenam, C.E.W.M. (author), Balder, T. (author), Fang, Y. (author), Lieber, C.M. (author), Kouwenhoven, L.P. (author)We report the realization of extremely small single quantum dots in p-type silicon nanowires, defined by Schottky tunnel barriers with Ni and NiSi contacts. Despite their ultrasmall size the NiSi–Si–NiSi nanowire quantum dots readily allow spectroscopy of at least ten consecutive holes, and additionally they display a pronounced excited-state...journal article 2009
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Mosselman, E. (author), Luxemburg, W. (author), Solomatine, D. (author), Zwanenburg, C. (author), Vrouwenvelder, T. (author)This document reports the progress of Delft Cluster project CT04.30 "Safety against flooding" till June 2009. Fundamental knowledge from the project has resulted in a large number of scientific publications, PhD theses and MSc theses. Work package A 1 in particular has resulted in high-profile scientific publications, immediately awarded with...report 2009
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Van Duinen, A. (author), Förster, U. (author), Van Hoven, A. (author), Teunissen, H. (author), Zwanenburg, C. (author)Het SBW programma heeft als doel onderzoek uit te voeren voor de nieuwe VTV 2011. Het SBW project getiteld werkelijke sterkte beoogt dit te realiseren voor het toetsspoor macrostabiliteit. Dit rapport beschrijft de planning van de werkzaamheden voor 2009 en geeft inzicht in de verwachte werkzaamheden in 2010. Thans is voorzien dat het project in...report 2009
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