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Search for "superconductors" in Full Text gives 67 result(s) in Beilstein Journal of Nanotechnology.

Formation mechanisms of boron oxide films fabricated by large-area electron beam-induced deposition of trimethyl borate

  • Aiden A. Martin and
  • Philip J. Depond

Beilstein J. Nanotechnol. 2018, 9, 1282–1287, doi:10.3762/bjnano.9.120

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  • -containing materials are diverse and include high-energy laser fusion targets [1], superconductors [2], X-ray optics [3], microelectromechanical systems [4], and neutron detectors [5]. All these alluring applications are, however, overshadowed by fabrication challenges at the microscale arising from
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Published 24 Apr 2018

Proximity effect in a two-dimensional electron gas coupled to a thin superconducting layer

  • Christopher Reeg,
  • Daniel Loss and
  • Jelena Klinovaja

Beilstein J. Nanotechnol. 2018, 9, 1263–1271, doi:10.3762/bjnano.9.118

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  • . Keywords: Majorana fermions; mesoscopic physics; proximity effect; quantum computing; topological superconductivity; Introduction Topological superconductors host zero-energy Majorana bound states at their edges that are highly sought for applications in topological quantum computing [1][2][3]. The two
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Published 23 Apr 2018

Circular dichroism of chiral Majorana states

  • Javier Osca and
  • Llorenç Serra

Beilstein J. Nanotechnol. 2018, 9, 1194–1199, doi:10.3762/bjnano.9.110

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  • for px ± ipy fields and, obviously, also a vanishing CD. Model We use the model of [17] for a quantum-anomalous Hall (3D) thin film in contact with two different superconductors. This model represents the device as two surfaces with a certain interaction between them, with Majorana states being
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Published 16 Apr 2018

Inverse proximity effect in semiconductor Majorana nanowires

  • Alexander A. Kopasov,
  • Ivan M. Khaymovich and
  • Alexander S. Mel'nikov

Beilstein J. Nanotechnol. 2018, 9, 1184–1193, doi:10.3762/bjnano.9.109

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  • indirectly superconducting region is affected by effective Zeeman field through tunneling. The presence of several solutions for Tc is typical for the standard paramagnetic effect in superconductors and usually this behavior results in the FFLO instability of the homogeneous solution for the gap function [32
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Published 16 Apr 2018

Revealing the interference effect of Majorana fermions in a topological Josephson junction

  • Jie Liu,
  • Tiantian Yu and
  • Juntao Song

Beilstein J. Nanotechnol. 2018, 9, 520–529, doi:10.3762/bjnano.9.50

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  • topological superconductors as shown in Figure 1a. Unlike previous studies, we focus on the density of states (DOS) for both the electron part and the hole part. The essential property of the MFs is that the wave function of the electron part must be conjugated with the wave function of the hole part, which
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Published 12 Feb 2018

Beyond Moore’s technologies: operation principles of a superconductor alternative

  • Igor I. Soloviev,
  • Nikolay V. Klenov,
  • Sergey V. Bakurskiy,
  • Mikhail Yu. Kupriyanov,
  • Alexander L. Gudkov and
  • Anatoli S. Sidorenko

Beilstein J. Nanotechnol. 2017, 8, 2689–2710, doi:10.3762/bjnano.8.269

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  • a deep analogy between superconducting logic cells and von Neuman cellular automata [16] where short-range interactions are predominant. The nonlinear element in superconducting circuits is the Josephson junction. It is a weak link between two superconductors, e.g., the most commonly used
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Published 14 Dec 2017

Direct writing of gold nanostructures with an electron beam: On the way to pure nanostructures by combining optimized deposition with oxygen-plasma treatment

  • Domagoj Belić,
  • Mostafa M. Shawrav,
  • Emmerich Bertagnolli and
  • Heinz D. Wanzenboeck

Beilstein J. Nanotechnol. 2017, 8, 2530–2543, doi:10.3762/bjnano.8.253

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  • important fabrication tools for the production of nanoscale structures and devices in magnetics [11][12][13][14][15], superconductors [16], and nanoelectronics [17][18][19]. The use of FEBID processing as a nanosurgery method for novel nanomaterials, such as graphene, is particularly appealing [20][21][22
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Published 29 Nov 2017

Anodization-based process for the fabrication of all niobium nitride Josephson junction structures

  • Massimiliano Lucci,
  • Ivano Ottaviani,
  • Matteo Cirillo,
  • Fabio De Matteis,
  • Roberto Francini,
  • Vittorio Merlo and
  • Ivan Davoli

Beilstein J. Nanotechnol. 2017, 8, 539–546, doi:10.3762/bjnano.8.58

Graphical Abstract
  • investigate its mechanical and adhesion properties. The transport properties of NbN/AlN/NbN Josephson junctions obtained as a result of the above described fabrication process were measured in liquid helium at 4.2 K. Keywords: Josephson effect; superconductors; thin films; tunneling; Introduction Niobium
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Published 02 Mar 2017

Graphene–polymer coating for the realization of strain sensors

  • Carmela Bonavolontà,
  • Carla Aramo,
  • Massimo Valentino,
  • Giampiero Pepe,
  • Sergio De Nicola,
  • Gianfranco Carotenuto,
  • Angela Longo,
  • Mariano Palomba,
  • Simone Boccardi and
  • Carosena Meola

Beilstein J. Nanotechnol. 2017, 8, 21–27, doi:10.3762/bjnano.8.3

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  • Nucleare, sezione di Napoli, Napoli, Italy CNR-SPIN Institute for Superconductors, Oxides and other Innovative materials and Devices, Via Cintia, 80134 Napoli, Italy CNR-IPCB, Institute for Polymers, Composites and Biomaterials, Viale Kennedy, 54 - Mostra d’Oltremare Pad. 20, 80125 Napoli, Italy
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Published 03 Jan 2017

Thickness-modulated tungsten–carbon superconducting nanostructures grown by focused ion beam induced deposition for vortex pinning up to high magnetic fields

  • Ismael García Serrano,
  • Javier Sesé,
  • Isabel Guillamón,
  • Hermann Suderow,
  • Sebastián Vieira,
  • Manuel Ricardo Ibarra and
  • José María De Teresa

Beilstein J. Nanotechnol. 2016, 7, 1698–1708, doi:10.3762/bjnano.7.162

Graphical Abstract
  • properties, as shown here. Before describing the designed vortex pinning landscape in the W–C nanostructures, let us mention some specific aspects of vortex pinning in superconductors and the influence on magnetotransport properties, which will be useful to understand our data. The application of external
  • magnetic fields on type-II superconductors gives rise to a vortex lattice that is hexagonal in most cases [23]. In the presence of a current, vortices move under the action of the Lorentz force [24], producing dissipation and limiting its electrical current and magnetic field working ranges. Vortex motion
  • the vortex pinning landscape with the FIB and the intrinsically low, random pinning in these superconductors. The magnetic fields at which local minima have been experimentally observed in all the thickness-modulated samples are plotted in Supporting Information File 1, Figure S2 as a function of the
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Published 14 Nov 2016

Nonlinear thermoelectric effects in high-field superconductor-ferromagnet tunnel junctions

  • Stefan Kolenda,
  • Peter Machon,
  • Detlef Beckmann and
  • Wolfgang Belzig

Beilstein J. Nanotechnol. 2016, 7, 1579–1585, doi:10.3762/bjnano.7.152

Graphical Abstract
  • . Keywords: spintronics, superconductor-ferromagnet hybrids, thermoelectricity; Introduction Electrons in classical superconductors are bound in spin-singlet Cooper pairs, whereas ferromagnetic materials prefer parallel spin alignment. In nanoscale hybrid structures made of superconductors and ferromagnets
  • nonequilibrium spin transport in nanoscale superconductors [30]. Also, performance can be improved by using ferromagnetic insulators as spin-filter tunnel junctions, with a degree of spin polarization P ≈ 100% [31][32]. At finite voltage bias, we find large thermoelectric signals for both FIS and NIS structures
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Published 03 Nov 2016

Tunable magnetism on the lateral mesoscale by post-processing of Co/Pt heterostructures

  • Oleksandr V. Dobrovolskiy,
  • Maksym Kompaniiets,
  • Roland Sachser,
  • Fabrizio Porrati,
  • Christian Gspan,
  • Harald Plank and
  • Michael Huth

Beilstein J. Nanotechnol. 2015, 6, 1082–1090, doi:10.3762/bjnano.6.109

Graphical Abstract
  • photomask repair [20] to fabrication of nanowires [17][21], nanopores [22], magnetic [5][12] and strain sensors [23] as well as direct-write superconductors [24]. The precursors Co2(CO)8 and (CH3)3CH3PtC5H4 from which Pt- an Co-based structures can be fabricated in the FEBID process, like most metal-organic
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Published 29 Apr 2015

Towards precise defect control in layered oxide structures by using oxide molecular beam epitaxy

  • Federico Baiutti,
  • Georg Christiani and
  • Gennady Logvenov

Beilstein J. Nanotechnol. 2014, 5, 596–602, doi:10.3762/bjnano.5.70

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  • is suitable for the growth of a highly crystalline structure. The feasibility of using ozone as a source for the successful growth of complex oxides and in particular high-Tc superconductors was demonstrated by several groups led by H. Mooij, A. Goldman, J. Eckstein, I. Bozovic, D. Schlom, M. Naito
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Published 08 May 2014

Charge and spin transport in mesoscopic superconductors

  • M. J. Wolf,
  • F. Hübler,
  • S. Kolenda and
  • D. Beckmann

Beilstein J. Nanotechnol. 2014, 5, 180–185, doi:10.3762/bjnano.5.18

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  • M. J. Wolf F. Hubler S. Kolenda D. Beckmann Karlsruher Institut für Technologie (KIT), Institut für Nanotechnologie, P.O. Box 3640, D-72021 Karlsruhe, Germany 10.3762/bjnano.5.18 Abstract Background: Non-equilibrium charge transport in superconductors has been investigated intensely in the 1970s
  • structures was pioneered in the 1970s with the discovery of spin-dependent tunneling into thin-film superconductors with a large Zeeman splitting by Tedrow and Meservey [1][2]. While much of the related basic physics such as tunneling magnetoresistance (TMR) [3] and non-equilibrium spin injection [4] was
  • observed subsequently, spin-polarized transport did not attract much attention until the discovery of the giant magnetoresistance (GMR) [5][6][7] and its technical applications. In superconductors, electrons are bound in Cooper pairs, which usually have a singlet structure and therefore carry only charge
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Published 17 Feb 2014

Nanoglasses: a new kind of noncrystalline materials

  • Herbert Gleiter

Beilstein J. Nanotechnol. 2013, 4, 517–533, doi:10.3762/bjnano.4.61

Graphical Abstract
  • . More recent examples are light weight metals (e.g., Al), semiconductors (e.g., Si), materials with high strength (e.g., steels), superconductors, ferroelectrics, special ferromagnetic materials etc. The main reason for the preference of crystalline materials is the fact that one can control their
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Published 13 Sep 2013

Focused electron beam induced deposition: A perspective

  • Michael Huth,
  • Fabrizio Porrati,
  • Christian Schwalb,
  • Marcel Winhold,
  • Roland Sachser,
  • Maja Dukic,
  • Jonathan Adams and
  • Georg Fantner

Beilstein J. Nanotechnol. 2012, 3, 597–619, doi:10.3762/bjnano.3.70

Graphical Abstract
  • intermetallic phases, two of which are superconductors. It is thus worthwhile discussing the Pt–Si system in some more detail. Pt–Si FEBID structures As already alluded to in the last subsection the binary phase diagram of the Pt–Si system reveals two intermetallic compounds, which have a superconducting ground
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Published 29 Aug 2012

P-wave Cooper pair splitting

  • Henning Soller and
  • Andreas Komnik

Beilstein J. Nanotechnol. 2012, 3, 493–500, doi:10.3762/bjnano.3.56

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  • function of charge transfer. As a first step, we discuss characteristics of the conductance for crossed Andreev reflection in superconductor–ferromagnet beam splitters with s-wave and p-wave superconductors and no spin-active scattering. In a second step, we consider spin-active scattering and show how to
  • pair splitters, that can otherwise only be realized by using p-wave superconductors. In particular, it provides access to Bell states that are different from the typical spin singlet state. Keywords: Cooper pair splitting; entanglement; Hamiltonian approach; spin-active scattering; superconductivity
  • easily be identified in a hybrid junction between a superconductor and two ferromagmets (setup shown later in Figure 1). However, p-wave superconductors that can be easily handled in quantum transport experiments are presently not available. Therefore, in a second step we show how p-wave splitting can be
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Published 06 Jul 2012
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