1,244 search results for “title superconductivity” in the Public website
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Spin transport and superconductivity in half-metallic nanowires and junctions
The interest of this thesis lies in spin transport in normal metals and superconducting half-metallic junctions.
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Inducing spin triplet superconductivity in a ferromagnet
Promotor: J. Aarts
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side-band cooling of a trampoline resonator and the effect of superconductivity on the Casimir force
This thesis consists of two subjects, that are both a consequence of radiation pressure.
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On electronic signatures of topological superconductivity
Promotor: Prof.dr. C.W.J. Beenakker
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The physics of nanowire superconducting single-photon detectors
Promotores: Prof.dr. D. Bouwmeester, Prof.dr. A. Fiore (TU Eindhoven)
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Aarts Lab - Magnetic and Superconducting Materials
In the Aarts lab we combine or structure materials, mostly in thin film form, in such a way that the hybrid has different and novel properties or functionalities.
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The holographic glass bead game: from superconductivity to time machines
Promotores: Prof.dr. J. Zaanen & Prof.dr. K.E. Schalm
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Towards superconducting spintronics with RuO2 and CrO2 nanowires
CrO2, a half-metal ferromagnet, has shown great promise for superconducting spintronics applications for nearly two decades.
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On the coexistence of Landau levels and superconductivity
In unconventional high temperature superconductors, supercurrent vortices are known to spoil the Landau levels. In this thesis the emergence of Landau levels is studied in different types of superconductors: Weyl superconductors, and the Fu-Kane heterostructure.
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Quantum computation with Majorana zero modes in superconducting circuits
Promotor: C.W.J. Beenakker, Co-Promotor: A.R. Akhmerov
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Disorder and interactions in high-temperature superconductors
This thesis is devoted to an in-depth examination of the various effects of disorder in the cuprate high-temperature superconductors.
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Kaveh Lahabi
Science
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Paradox in superconductivity at high temperature
Nature publishes an article on a paradoxical discovery in superconductivity. Physicists are searching for superconductivity at high temperatures so that less cooling is needed in for example MRI machines. News & Views article by Prof. Jan Zaanen in the same issue of August 19th.
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Superconductivity with a twist explained
Leiden physicists and international colleagues from Geneva and Barcelona have confirmed the mechanism that makes magic-angle graphene superconducting. This is a key step in elucidating high-temperature superconductivity, a decades-old mystery central to physics, which may lead to technological break…
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New memory developed for superconducting computer
If computers work on superconducting current, they won’t consume any energy. Leiden physicists have now gained control over a new type of superconducting memory elements. Publication in Nature Communications.
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Spin-triplet supercurrents of odd and even parity in nanostructured devices
Triplet superconductivity refers to a condensate of equal-spin Cooper pairs (pairs of electrons with equal spin).
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Superconductivity theory under attack
Measurements on a superconducting material show an abrupt transition between a normal metal and a 'strange' metal. The really strange thing, however, is that this abruptness disappears when the temperature falls. 'We don't have any theoretical machinery for this', says theoretical physicist Jan Zaanen,…
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Understanding superconductivity comes closer with major ERC grant for Milan Allan
Physicist Milan Allan will build an instrument that will bring superconductivity research further. He has been awarded an ERC Consolidator Grant of 2 million euros over the next five years. With his PairNoise programme he aims to detect paired electrons as they occur just above the temperature at which…
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Theorie van fermion-pariteit-omkeringen in supergeleiders
Majorana meets a mermaid
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Leiden Physicists invent printable superconducting devices
Superconducting devices such as SQUIDS (Superconducting Quantum Interferometry Device) can perform ultra-sensitive measurements of magnetic fields. Leiden physicsts invented a method to 3D-print these and other superconducting devices in minutes.
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Size effects in microstructured superconductors and quantum materials
We find ourselves in an era of transition, not just towards a more computing- and data-driven society but also away from unsustainable fossil fuels as an energy source.
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Supercurrents gone chiral: new type of superconducting junction
Unconventional superconductors form one of the big mysteries in physics. Among them is strontium ruthenate, which stands out as a controversial superconductor. During his PhD, Leiden physicist Kaveh Lahabi has provided new insights into the nature of superconductivity in this material, leading to a…
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Insights from scanning tunneling microscopy experiments into correlated electron systems
This thesis presents insights from our study of various correlated electron systems with a scanning tunneling microscope (STM). In ordinary metals, electron-electron interactions exist, but get substantially screened due to the sheer number of electrons.
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Strings attached to future high-temperature superconductivity
The behaviour of strongly correlated electron systems, such as high-temperature superconductors, defies explanation in the language of ordinary quantum theory. A seemingly unrelated area of physics, string theory, might give physicists a better understanding of the weird behaviour of these kinds of…
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Josephson and noise scanning tunneling microscopy on conventional, unconventional and disordered superconductors
In this thesis we use Josephson and noise scanning tunneling microscopy for the study of conventional, unconventional (iron-based) and disordered superconductors. On the one hand, Josephson scanning tunneling microscopy allows us to directly visualize the superfluid density with high spatial resolut…
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How superconducting memory could help data centres reduce their carbon footprint
Online services are stored on servers in data centres. Remko Fermin researched methods to make the memory in data centres more energy efficient.
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Super women on superconductivity: International Day of Women and Girls in Science
Since 2015 the United Nations have declared 11 February the International Day of Women and Girls in Science. Leiden University organized a public event for over a hundred visitors. In between a lecture on the building blocks of life and a talkshow on the impact of science on society, high school students…
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Raindrops on the roof-technique reveals new quantum liquid
Koen Bastiaans and his colleagues discovered a new quantum liquid unlike anything ever seen. They did it by using a technique that can be compared to listening to the sound of raindrops falling on a roof. Publication in Science 29 October.
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KHMW graduation prize for research on superconducting qubits
Matthias Flór receives the KHMW Graduation Prize in Theoretical Physics for his master's thesis. His research on exotic superconductors at Leiden University and TU Delft struck a chord with the jury. The jury unanimously chose to award Flór noting that ‘he demonstrated impressive technical abilities…
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Jan Aarts receives FOM Projectruimte Grant
Experimental physicist Jan Aarts has received a FOM Projectruimte grant of 545,000 euro. He will use the budget to study the interaction between superconducting currents and ferromagnetism. In the future, this might lead to computer memory with negligible energy consumption.
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Rubicon grant for Remko Fermin: superconducting diodes for energy-efficient data centres
Physicist Remko Fermin from Leiden University was awarded a Rubicon grant from NWO. He will use it to study superconducting diodes that could contribute to reducing the CO2 emission of data centres.
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Pinching holes to create superconductors
In their quest for materials that conduct electricity without resistance at moderate temperatures, scientists usually work on their chemical make-up. Now Leiden physicists have come up with a radically new approach: pinching holes in a periodic pattern. Publication in SciPost.
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Photon detection at subwavelength scales
Promotor: E.R. Eliel, Co-Promotor: M.J.A. de Dood
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Outstanding Academic Titles for 2010
Cambridge History of South Africa, volume 1: From early times to 1885 (edited by Carolyn Hamilton, Bernard K. Mbenga, and Robert Ross) made Choice magazine's list of Outstanding Academic Titles for 2010.
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Quantum Matter and Optics
Research groups in the Quantum Matter & Optics programme investigate electronic properties of matter and light-matter interactions with emphasis on quantum information.
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Record distance for alternative super current
Electrons that spin synchronously around their axis, turn out to stay superconducting across large distances within magnetic chromium dioxide. Electric current from these electrons can flip small magnets, and its superconducting version could form the basis for a hard drive without energy loss. Publication…
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Collaboration group Aarts and Intel
Physics professor Jan Aarts starts a collaboration with chip manufacturer Intel to perform fundamental research in low-power, cryogenic computing.
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Melting of frozen electrons visualized
For the first time, physicists have visualized the ‘melting’ of electrons inside a special class of insulators. It allows electrons to move freely and turns the insulator into a metal and possibly later into a superconductor. Publication in Nature Physics.
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Solution to distortion effect STM scanning
STM scanning experiments on poorly conducting materials are challenging, and can cause a distortion effect. A new model corrects for this effect, allowing physicists to better study materials in their quest to understand unconventional superconductivity. Publication in Physical Review B as Editor’s…
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Frost for sale!
Liquid nitrogen, frozen fruit and levitating market-goers. On Friday 8 April, visitors to the weekly market in the Merenwijk district were exposed to superconductivity. What is it exactly? And what does it look like? Young and old were impressed by the experiments demonstrated by Leiden students from…
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Three FOM-Projectruimte Grants for Leiden Physics
The Leiden Institute of Physics has been awarded three out of twelve available grants from the FOM Projectruimte. Principal Investigators Milan Allan, Stefan Semrau and Carlo Beenakker all receive around 400,000 euro for their research.
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Jaap de Hoop Scheffer receives honorary title Minister of State
On 22 June 2018, Prime Minister Rutte announced that Jaap de Hoop Scheffer, Professor of International Relations and Diplomatic Practices at the Institute of Security and Global Affairs (ISGA), together with former ministers Sybilla Dekker and Winnie Sorgdrager, will become Minister of State.
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Michiel de Dood Lab - Quantum Detection
Our group explores the larger domain of quantum measurement. In particular we investigate two themes that are closely connected: The detection of specially prepared quantum states of light and understanding and characterizing quantum photon detectors.
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Surprising similarity between stripy black holes and high-temperature superconductors
We don’t understand how some materials become superconducting at relatively high temperatures. Leiden physicists have now found a surprising connection with auxiliary black holes. It enables us to use our knowledge of black holes on the mystery of high-temperature superconductivity. Publication in Nature…
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Spinoza prize for Jan Zaanen
Jan Zaanen, Professor in Theoretical Physics of condensed material, has been awarded a Spinoza prize. His pioneering ideas about the collective behaviour of quantum particles and high temperature superconductivity have often given him the reputation of being something of a rebel.
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Leiden University publishes the titles of seven tainted scientific articles
In a supplementary decision on 17 May 2022, the Executive Board of Leiden University has concluded that it will publish the titles of seven articles in which there is evidence of malpractice. This concerns a former staff member of the Institute of Psychology. The Executive Board considers it to be in…
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MSc Research Presentation Eduard Abeln 12 December @ 11:00 -12:00 hrs, HL207
The project has been done in the QMO group under the supervision of Dr. Michiel de Dood.The title of the presentation is: ''Superconducting transitions of MoSi nanowires around the critical current.
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Three awarded research projects in NWO-XS call
Cryogenic memories, antibiotic treatment for urinary tract infections and recycling plastic sustainably. These are the subjects of the three NWO-XS grants awarded to Leiden Science researchers.
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Physical reality of string theory demonstrated
String theory has come under fire in recent years. Promises have been made that have not been lived up to. Leiden theoretical physicists have now for the first time used string theory to describe a physical phenomenon. Their discovery has been reported this week in 'Science'.
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Lattice models for Josephson junctions and graphene superlattices
In this thesis we study quantum transport phenomena on the nanometer scale, in two classes of materials: topological insulators with induced superconductivity and graphene superlattices.