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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, 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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Zwanenburg, F.A. (author)The research in this thesis is motivated by an interest in quantum physics and by the prospect of new applications based on the spin of electrons or holes. This work focuses on confining single spins in quantum dots, which can serve as building blocks of a future quantum computer. Such a computer exploits the unique features of quantum mechanics...doctoral thesis 2008
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Zwanenburg, C. (author), Lehnen, C. (author)Eén van de belangrijke onderdelen van het Delft Clusteronderzoek ‘Duurzame onderhoudsstrategie voor voorzieningen op slappe bodem’ is het maken van een afweegmodel. Met het model kan de meest optimale maatregel worden bepaald voor het opnieuw ophogen van de openbare ruimte in woonwijken. Een belangrijk onderdeel van het afweegmodel voor het...report 2006
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Zwanenburg, C. (author)Soft soil is often described as an anisotropic heterogeneous material. Standard soil investigation mainly involves vertically retrieved samples. Information on the parameters working in the horizontal direction remains scarce. Principally each soil property like permeability, stiffness or strength might show anisotropic behaviour. This thesis...doctoral thesis 2005
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- Lindenberg, J. (author), Van, M.A. (author), Koelewijn, A.R. (author), Zwanenburg, C. (author), Lambert, J.W.M. (author), van der Meer, M.T. (author), Teunissen, P.A.A. (author) report 2002