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The electronic transport and spincaloric properties of epitaxial magnetic tunnel junctions with half-metallic Co$_2$MnSi Heusler electrodes, MgO tunneling barriers, and different interface terminations are investigated by using…

Materials Science · Physics 2018-05-16 Benjamin Geisler , Peter Kratzer

We report on the direct observation of the thermoelectric transport in a nondegenerate correlated electron system formed on the surface of liquid helium. We find that the microwave-induced excitation of the vertical transitions of electrons…

Other Condensed Matter · Physics 2021-11-10 Ivan Kostylev , A. A. Zadorozhko , M. Hatifi , Denis Konstantinov

We study the variation of electron transmission through Au-S-benzene-S-Au junctions and related systems as a function of the structure of the Au:S contacts. For junctions with semi-infinite flat Au(111) electrodes, the highly coordinated…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 A. Grigoriev , J. Skoeldberg , G. Wendin , Z. Crljen

Theoretical investigations of spin transfer torque in magnetic tunnel junctions using the tight-binding model in the framework of non-equilibrium Green functions formalism are presented. We show that the behavior of the spin transfer torque…

Materials Science · Physics 2009-11-13 M. Chshiev , I. Theodonis , A. Kalitsov , N. Kioussis , W. H. Butler

We propose a model describing Seebeck effect on a weak link between two quantum systems with fine-tunable ground states of Fermi and Non-Fermi liquid origin. The experimental realization of the model can be achieved by utilizing the quantum…

Mesoscale and Nanoscale Physics · Physics 2018-02-06 T. K. T. Nguyen , M. N. Kiselev

The Seebeck coefficient (S) of a serially coupled quantum dot (SCQD) junction system is theoretically studied via a two-level Anderson model. A change of sign in S with respect to temperature is found, which arises from the competition…

Mesoscale and Nanoscale Physics · Physics 2015-05-27 David M. -T. Kuo , Yia-chung Chang

We analyze various limits of vibrationally coupled resonant electron transport in single-molecule junctions. Based on a master equation approach, we discuss analytic and numerical results for junctions under a high bias voltage or weak…

Mesoscale and Nanoscale Physics · Physics 2015-03-18 R. Härtle , M. Thoss

We consider exciton effects on current in molecular nanojunctions, using a model comprising a two two-level sites bridge connecting free electron reservoirs. Expanding the density operator in the many-electron eigenstates of the uncoupled…

Strongly Correlated Electrons · Physics 2015-05-14 GuangQi Li , Boris D. Fainberg , Abraham Nitzan , Sigmund Kohler , Peter Hänggi

When two planar atomic membranes are placed within the van der Waals distance, the charge and heat transport across the interface are coupled by the rules of momentum conservation and structural commensurability, leading to outstanding…

Mesoscale and Nanoscale Physics · Physics 2018-01-08 Phanibhusan S. Mahapatra , Kingshuk Sarkar , H. R. Krishnamurthy , Subroto Mukerjee , Arindam Ghosh

Thermoelectric effects have attracted wide attention in recent years from physicists and engineers. In this work, we explore the selfsimilar patterns in the thermoelectric effects of monolayer graphene based structures, by using the quantum…

Materials Science · Physics 2020-12-04 M. Miniya , O. Oubram , A. G. Reynaud Morales , I. Rodriguez-Vargas , L. M. Gaggero Sager

We consider the time-dependent electron transport through a quantum dot connected to multiple leads in the presence of the additional over-dot (bridge) tunnelling channels by using the evolution operator technique. Each terminal and quantum…

Mesoscale and Nanoscale Physics · Physics 2007-06-13 R. Taranko , T. Kwapinski , E. Taranko

Thermoelectric effects in normal metals and superconductors are usually very small due to the presence of electron-hole symmetry. Here, we show that superconducting junctions brought out of equilibrium manifest a sizable bipolar…

We study proximity effects at ferromagnet superconductor interfaces by self-consistent numerical solution of the Bogoliubov-de Gennes equations for the continuum, without any approximations. Our procedures allow us to study systems with…

Superconductivity · Physics 2009-11-07 Klaus Halterman , Oriol T. Valls

We revisit the problem of the dynamic response of a superconducting bridge after abruptly switching on the supercritical current $I>I_c$. In contrast to previous theoretical works we take into account spatial gradients and use both the…

Superconductivity · Physics 2014-11-18 D. Yu. Vodolazov , F. M. Peeters

The influence of the charging effects on the transport characteristics of a molecular wire bridging two metallic electrodes in the limit of weak contacts is studied by generalized Breit-Wigner formula. Molecule is modeled as a quantum dot…

Chemical Physics · Physics 2009-11-10 Kamil Walczak

We discuss the peculiarities of the Seebeck effect in stabilized electrolytes containing the colloidal particles. Its unusual feature is the two-stage character, with the linear increase of differential thermopower as the function of…

Soft Condensed Matter · Physics 2021-02-24 Ioulia Chikina , Sawako Nakamae , Valeriy Shikin , Andrey Varlamov

Despite its fundamental importance for nano physics and chemistry and potential device applications, the relationship between atomic structure and electronic transport in molecular nanostructures is not well understood. Thus the…

Mesoscale and Nanoscale Physics · Physics 2014-02-04 Alireza Saffarzadeh , Firuz Demir , George Kirczenow

The superconducting diode effect (SDE)-the unidirectional, dissipationless flow of supercurrent-is a critical element for future superconducting electronics. Achieving high efficiency under zero magnetic field is a key requirement. The…

The transport properties of a tunnel barrier in a one-dimensional wire are investigated at finite voltages and temperatures. We generalize the Luttinger model to account for finite ranges of the interaction. This leads to deviations from…

Mesoscale and Nanoscale Physics · Physics 2009-10-30 Margit Steiner , Wolfgang Häusler

Irradiation of the strong light on the material leads to numerous non-linear effects that are essential to understand the physics of excited states of the system and for optoelectronics. Here, we study the non-linear thermoelectric effect…

Mesoscale and Nanoscale Physics · Physics 2021-03-05 Pankaj Bhalla
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