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We demonstrate that non-diffusive, fluid-like heat transport, such as heat backflowing from cooler to warmer regions, can be induced, controlled, and amplified in extreme thermal conductors such as graphite and hexagonal boron nitride. We…

Materials Science · Physics 2025-10-22 Jan Dragašević , Bogdan Rajkov , Michele Simoncelli

We demonstrate an Al superconducting quantum interference device in which the Josephson junctions are implemented through gate-controlled proximitized Cu mesoscopic weak-links. The latter behave analogously to genuine superconducting metals…

Measurements of magnetic induction near an ice rod in the strong electric field were carried out. Theoretical estimation of the magnetic induction was made. It was found that in the average the experimental values of magnetic induction were…

General Physics · Physics 2013-07-09 Alexander I. Korolev

Control of the edge topology of graphene nanostructures is critical to graphene-based electronics. A means of producing atomically smooth zigzag edges using electronic current has recently been demonstrated in experiments [Jia et al.,…

Materials Science · Physics 2015-05-14 Mads Engelund , Joachim Furst , Mads Brandbyge , Antti-Pekka Jauho

We study transport in coherent conductors driven by a time-periodic bias voltage. We present results of the charge and energy noise and complement them by a study of the mixed noise, namely the zero-frequency correlator between charge and…

Mesoscale and Nanoscale Physics · Physics 2015-01-07 Francesca Battista , Federica Haupt , Janine Splettstoesser

In magnetic nanostructures one usually uses a magnetic field to commute between two resistance (R) states. A less common but technologically more interesting alternative to achieve R-switching is to use an electrical current, preferably of…

Materials Science · Physics 2009-11-11 J. Ventura , J. P. Araujo , J. B. Sousa , Y. Liu , Z. Zhang , P. P. Freitas

At a superconductor (S)-normal metal (N) junction pairing correlations can "leak-out" into the N region. This proximity effect [1, 2] modifies the system transport properties and can lead to supercurrent flow in SNS junctions [3]. Recent…

Mesoscale and Nanoscale Physics · Physics 2011-03-15 S. Roddaro , A. Pescaglini , D. Ercolani , L. Sorba , F. Giazotto , F. Beltram

We examine the nature of the transitions between the normal and the superconducting branches of superconductor-graphene-superconductor Josephson junctions. We attribute the hysteresis between the switching (superconducting to normal) and…

Mesoscale and Nanoscale Physics · Physics 2013-08-09 I. V. Borzenets , U. C. Coskun , H. T. Mebrahtu , Yu. V. Bomze , A. I. Smirnov , G. Finkelstein

The application of weak electric fields (<~ 100 V/cm) is found to dramatically enhance the lattice thermal conductivity of the antiferromagnetic (AF) insulator CaMnO(3) over a broad range of temperature about the Neel ordering point (125…

Strongly Correlated Electrons · Physics 2009-11-13 C. Chiorescu , J. J. Neumeier , J. L. Cohn

We have observed back-bending structures at high bias current in the current-voltage curves of intrinsic Josephson junctions. These structures may be caused by nonequilibrium quasiparticle injection and/or Joule heating. The energy gap…

Superconductivity · Physics 2009-11-10 L. X. You , P. H. Wu , J. Chen , W. W. Xu , K. Kajiki , S. Watauchi , I. Tanaka

We propose a system where coherent thermal transport between two reservoirs in non-galvanic contact is modulated by independently tuning the electron-photon and the electron-phonon coupling. The scheme is based on two gate-controlled…

Mesoscale and Nanoscale Physics · Physics 2017-08-18 Federico Paolucci , Giuliano Timossi , Paolo Solinas , Francesco Giazotto

The transport properties of hot holes in silicon at cryogenic temperatures exhibit several anomalous features, including the emergence of two distinct saturated drift velocity regimes and a non-monotonic trend of the current noise versus…

Materials Science · Physics 2023-06-28 David S. Catherall , Austin J. Minnich

We investigate the steady state heat current in two and three dimensional disordered harmonic crystals in a slab geometry, connected at the boundaries to stochastic white noise heat baths at different temperatures.The disorder causes short…

Disordered Systems and Neural Networks · Physics 2015-05-13 Abhishek Chaudhuri , Anupam Kundu , Dibyendu Roy , Abhishek Dhar , Joel L. Lebowitz , Herbert Spohn

We investigate the steady state heat current in two and three dimensional isotopically disordered harmonic lattices. Using localization theory as well as kinetic theory we estimate the system size dependence of the current. These estimates…

Disordered Systems and Neural Networks · Physics 2010-07-13 Anupam Kundu , Abhishek Chaudhuri , Dibyendu Roy , Abhishek Dhar , Joel L. Lebowitz , Herbert Spohn

While recent experiments on the spin Seebeck effect have revealed the decisive role of the magnon contribution to the heat current $Q$ in hybrid systems containing thin ferromagnetic layers, the available acoustic mismatch theory does not…

Mesoscale and Nanoscale Physics · Physics 2018-12-12 Valerij A. Shklovskij , Volodymyr V. Kruglyak , Ruslan V. Vovk , Oleksandr V. Dobrovolskiy

We study the heat current J in a classical one-dimensional disordered chain with on-site pinning and with ends connected to stochastic thermal reservoirs at different temperatures. In the absence of anharmonicity all modes are localized and…

Disordered Systems and Neural Networks · Physics 2009-11-13 Abhishek Dhar , J. L. Lebowitz

We consider transport properties of a two dimensional topological insulator in a double quantum point contact geometry in presence of a time-dependent external field. In the proposed setup an external gate is placed above a single…

Mesoscale and Nanoscale Physics · Physics 2017-03-15 F. Ronetti , M. Carrega , D. Ferraro , J. Rech , T. Jonckheere , T. Martin , M. Sassetti

We provide evidence for the effects of spin polarized current on a nanofabricated antiferromagnet incorporated into a spin-valve structure. Signatures of current-induced effects include bipolar steps in differential resistance,…

Materials Science · Physics 2009-11-13 Sergei Urazhdin , Nicholas Anthony

Current-induced torques on ferromagnetic nanoparticles and on domain walls in ferromagnetic nanowires are normally understood in terms of transfer of conserved spin angular momentum between spin-polarized currents and the magnetic…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 P. M. Haney , R. A. Duine , A. S. Nunez , A. H. MacDonald

Hot electrons injection in carbon nanotubes (CNTs ) where in addition to applied dc field ($\mathbf{E}$), there exist simultaneously a quasi-static ac electric field (i.e. when the frequency $\omega$ of ac field is much less than the…

Mesoscale and Nanoscale Physics · Physics 2016-04-20 M. Amekpewu , S. Y. Mensah , R. Musah , N. G. Mensah , S. S. Abukari , K. A. Dompreh