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We demonstrate single electron shuttling through two coupled nanomechanical pendula. The pendula are realized as nanopillars etched out of the semiconductor substrate. Coulomb blockade is found at room temperature, allowing metrological…

介观与纳米尺度物理 · 物理学 2012-04-20 Chulki Kim , Marta Prada , Robert H. Blick

We have made a systematic investigation of charge transport in 1D chains of Josephson junctions where the characteristic Josephson energy is much less than the single-island Cooper-pair charging energy, $E_\mathrm{J}\ll E_{CP}$. Such chains…

超导电性 · 物理学 2015-09-30 K. Cedergren , S. Kafanov , J-L. Smirr , J. H. Cole , T. Duty

We investigate the suppression of the superconducting transition temperature due to Coulomb repulsion in granular metallic systems at large tunneling conductance between the grains, $g_{T}\gg 1$. We find the correction to the…

介观与纳米尺度物理 · 物理学 2009-11-10 I. S. Beloborodov , A. V. Lopatin , V. M. Vinokur

Systems of quantum dots (QD) connected to leads exhibit periodic conductance peaks as a function of gate voltage arising from the Coulomb blockade effect \cite{review1,review2,review3}. Much effort goes into minimizing the size of QDs and…

介观与纳米尺度物理 · 物理学 2009-07-29 L. Bitton , R. Berkovits , A. Frydman

We report sharp peaks in the differential conductance of a single-electron transistor (SET) at low temperature, for gate voltages at which charge fluctuations are suppressed. For odd numbers of electrons we observe the expected Kondo peak…

介观与纳米尺度物理 · 物理学 2009-11-07 A. Kogan , G. Granger , M. A. Kastner , D. Goldhaber-Gordon , Hadas Shtrikman

We predict a new electron pair-tunneling (PT) resonance in non-linear transport through quantum dots with positive charging energies exceeding the broadening due to thermal and quantum fluctuations. The PT resonance shows up in the…

介观与纳米尺度物理 · 物理学 2013-01-10 M. Leijnse , M. R. Wegewijs , M. H. Hettler

Collective, low-energy excitations in quasi-two-dimensional d-wave superconductors are analyzed. While the long-range Coulomb interaction shifts the charge-density-wave and phase modes up to the plasma energy, the spin-density-wave…

超导电性 · 物理学 2009-10-30 M. I. Salkola , J. R. Schrieffer

An essential property of layered systems is the dynamical nature of the screened Coulomb interaction. Low energy collective modes appear as a consequence of the layering and provide for a superconducting-pairing channel in addition to the…

超导电性 · 物理学 2009-11-07 A. Bill , H. Morawitz , V. Z. Kresin

Transport through a tunnel junction connecting a superconductor to a spin-aligned quantum Hall fluid at filling $\nu$ is studied theoretically. The dominant transport channel at low temperatures is the tunnelling of Cooper pairs into edge…

凝聚态物理 · 物理学 2009-10-22 Matthew P. A. Fisher

We investigate transport and thermoelectric properties of hybrid systems based on a single-level quantum dot and one superconducting lead. The other lead is generally normal-metallic ferromagnet. In the latter case single-particle transport…

介观与纳米尺度物理 · 物理学 2017-05-03 Piotr Trocha , Józef Barnaś

We characterize in-situ grown parallel nanowires bridged by a superconducting island. The magnetic-field and temperature dependence of Coulomb blockade peaks measured across different pairs of nanowire ends are consistent with a sub-gap…

We investigate transport through hybrid structures consisting of two normal metal leads connected via tunnel barriers to one common superconducting electrode. We find clear evidence for the occurrence of non-local Andreev reflection and…

超导电性 · 物理学 2009-11-11 S. Russo , M. Kroug , T. M. Klapwijk , A. F. Morpurgo

In the presence of an applied magnetic field introducing Zeeman spin splitting, a superconducting (SC) proximitized one-dimensional (1D) nanowire with spin-orbit coupling can pass through a topological quantum phase transition developing…

介观与纳米尺度物理 · 物理学 2017-08-07 Ching-Kai Chiu , Jay D. Sau , S. Das Sarma

We study transport through a double quantum dot, both in the sequential tunneling and cotunneling regimes. Using a master equation approach, we find that, in the sequential tunneling regime, the differential conductance $G$ as a function of…

介观与纳米尺度物理 · 物理学 2016-08-31 Vitaly N. Golovach , Daniel Loss

A remarkable mystery of the copper oxide high-transition-temperature (Tc) superconductors is the dependence of Tc on the number of CuO2 layers, n, in the unit cell of a crystal. In a given family of these superconductors, Tc rises with the…

超导电性 · 物理学 2007-05-23 Sudip Chakravarty , Hae-Young Kee , Klaus Voelker

In their article, Zhang et al. [Phys. Rev. B 86, 024516 (2012)] present a remarkable result for A$_x$(S)$_y$TiNCl compounds ($\alpha$-phase TiNCl partially intercalated with alkali A and optionally co-intercalated molecular species S),…

超导电性 · 物理学 2015-06-23 Dale R. Harshman , Anthony T. Fiory

We study electron transport through a quantum dot in a Tomonaga-Luttinger liquid with an inhomogeneity induced either by a non-uniform electron interaction or by the presence of tunnel resistances of contacts. The non-analytic temperature…

介观与纳米尺度物理 · 物理学 2011-10-10 T. Kleimann , F. Cavaliere , M. Sassetti , B. Kramer

We address the tunneling conductance and spin inelastic tunneling spectroscopy of localized paramagnetic moments in a superconducting environment, pertaining to recent measurements on Fe-octaethylporphyrin-chloride using superconducting…

介观与纳米尺度物理 · 物理学 2015-05-29 P. Berggren , J. Fransson

In this letter we report single-hole tunneling through a quantum dot in a two-dimensional hole gas, situated in a narrow-channel field-effect transistor in intrinsic silicon. Two layers of aluminum gate electrodes are defined on Si/SiO$_2$…

The nature of the pseudogap phase of cuprate high-temperature superconductors is a major unsolved problem in condensed matter physics. We studied the commencement of the pseudogap state at temperature T* using three different techniques…