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We consider the influence of the electron-electron interaction on the nonlinearity of the current-voltage characteristic of the tunnel junction at low bias (diffusive anomaly) in the presence of the classical magnetic field. We present the…

Mesoscale and Nanoscale Physics · Physics 2009-10-30 E. V. Sukhorukov , A. V. Khaetskii

We present a theoretical and experimental study of spin precession in the presence of both a static and an orthogonal oscillating magnetic field, which is nonresonant, not harmonically related to the Larmor precession, and of arbitrary…

Atomic Physics · Physics 2013-09-02 G. Bevilacqua , V. Biancalana , Y. Dancheva , L. Moi

We apply particle based kinetic simulations to explore the characteristics of a low-pressure gas discharge driven by high-voltage ( $\sim$ kV) pulses with alternating polarity, with a duty cycle of $\approx$ 1% and a repetition rate of 5…

A superconductor with broken time reversal and inversion symmetry may exhibit nonreciprocal charge transport, including a nonreciprocal critical current, also known as superconducting diode effect. We report an intrinsic superconducting…

Superconductivity · Physics 2023-03-30 Robert Kealhofer , Hanbyeol Jeong , Arman Rashidi , Leon Balents , Susanne Stemmer

The dependence of microwave impedance of a dc-biased Josephson Fluxonic Diode (JFD) under application of both dc magnetic field and rf excitation is calculated with a variety of conditions. For finite length of a JFD excited by a very low…

Superconductivity · Physics 2018-07-04 Hamed Mehrara , Alireza Erfanian , Farshid Raissi

Inertial sensors that measure the acceleration of ultracold atoms promise unrivalled accuracy compared to classical equivalents. However, atomic systems are sensitive to various perturbations, including magnetic fields, which can introduce…

Atomic Physics · Physics 2023-12-11 A. Davis , P. J. Hobson , T. X. Smith , C. Morley , H. G. Sewell , J. Cotter , T. M. Fromhold

In this study, we have investigated the production of negative ions by mixing electronegative oxygen gas with electropositive argon gas in a geometrically asymmetric cylindrical capacitively coupled radio frequency plasma discharge. The…

The domain wall response under constant external magnetic fields reveals a complex behavior where sample disorder plays a key role. Furthermore, the response to alternating magnetic fields has only been explored in limited cases and…

More than 25 years ago, unexpected metallic behavior was discovered on the superconducting side of the superconductor-to-insulator transition. To this day, the origin of this behavior is unclear. In this work, we present resistance and…

Superconductivity · Physics 2024-01-18 André Haug , Dan Shahar

Rotating domain wall based sensors that have recently been developed are based on a segmented looping geometry. In order to determine the crucial pinning of domain walls in this special geometry, we investigate the depinning under different…

Materials Science · Physics 2017-11-22 Daniel Heinze , Benjamin Borie , Jürgen Wahrhusen , Hubert Grimm , Mathias Kläui

We consider electronic transport through a suspended voltage-biased nanowire. By coupling the tunneling current to a transverse magnetic field, vibrational modes of the wire are excited which influences the current-voltage characteristics…

Mesoscale and Nanoscale Physics · Physics 2010-11-08 Gustav Sonne

We study theoretically the linear conductance of a quantum dot connected to ferromagnetic leads. The dot level is split due to a non-collinear magnetic field or intrinsic magnetization. The system is studied in the non-interacting…

Mesoscale and Nanoscale Physics · Physics 2009-11-10 Jonas N. Pedersen , Jesper Q. Thomassen , Karsten Flensberg

We have developed a system for contactless measurement of nonlinear conductivity in the radio-frequency band, and over a wide temperature range. A non-resonant circuit is used to electrically excite the sample, and the induced signal is…

Instrumentation and Detectors · Physics 2014-07-25 Marija Došlić , Damjan Pelc , Miroslav Požek

We study the non-linear conductance $\mathcal{G}\sim\partial^2I/\partial V^2|_{V=0}$ in coherent quasi-1D weakly disordered metallic wires. The analysis is based on the calculation of two fundamental correlators (correlations of…

Mesoscale and Nanoscale Physics · Physics 2018-02-22 Christophe Texier , Johannes Mitscherling

We describe a technique for mapping the spatial variation of static electric, static magnetic, and rf magnetic fields using a pulsed atomic or molecular beam. The method is demonstrated using a beam designed to measure the electric dipole…

Atomic Physics · Physics 2009-11-13 J. J. Hudson , H. T. Ashworth , D. M. Kara , M. R. Tarbutt , B. E. Sauer , E. A. Hinds

We fabricated superconducting coplanar waveguide resonator with leads for dc bias, which enables the ac conductivity measurement under dc bias. The current and the magnetic field dependences of resonance properties were measured, and…

Superconductivity · Physics 2019-02-20 H. Kurokawa , F. Nabeshima , A. Maeda

Nanorings asymmetrically connected to wires show different kinds of quantum interference phenomena under sudden excitations and in steady current conditions. Here we contrast the transient current caused by an abrupt bias to the magnetic…

Mesoscale and Nanoscale Physics · Physics 2015-05-14 Michele Cini , Enrico Perfetto , Chiara Ciccarelli , Gianluca Stefanucci , Stefano Bellucci

We investigate the inversion process of magnetic domain walls (DWs) propagating through synthetic noncollinear magnetic textures, whereby an up/down DW can be transformed into a down/up DW and vice versa. We exploit the lateral coupling…

We report on the optical realization of the magneto-intersubband oscillations that have been measured in the sub-terahertz transmittance of a GaAs quantum well with two subbands occupied. Following their dc analogue, the oscillations are…

Mesoscale and Nanoscale Physics · Physics 2024-02-12 M. L. Savchenko , A. A. Bykov , A. Shuvaev , A. K. Bakarov , A. Pimenov , O. E. Raichev

Recent experiments using 15 frame interferometry on PF-1000 facility in Warsaw confirm the association between neutron emission and spontaneously self-organized, relatively long lasting, finite plasma structures. A crucial aspect of this…

Plasma Physics · Physics 2022-07-05 Mladen Mitov , Alexander Blagoev , Stanislav Zapryanov , S K H Auluck
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