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Generation of photocurrent via photon drag effect enables very fast light detection with response time limited by momentum relaxation. At the same time, photon drag in bulk uniform samples is small by the virtue of small photon momentum. We…

其他凝聚态物理 · 物理学 2025-10-21 I. M. Moiseenko , D. A. Svintsov , Zh. A. Devizorova

Electronic current densities can reach extreme values in highly conducting nanostructures where constrictions limit current. For bias voltages on the 1 volt scale, the highly non-equilibrium situation can influence the electronic density…

介观与纳米尺度物理 · 物理学 2019-07-17 Susanne Leitherer , Nick Papior , Mads Brandbyge

We demonstrate experimentally non-equilibrium transport in unipolar quasi-1D hot electron devices reaching ballistic limit. The devices are realized with heterostructure engineering in nanowires to obtain dopant- and dislocation-free…

介观与纳米尺度物理 · 物理学 2024-07-04 M. Kumar , A. Nowzari , A. R. Persson , S. Jeppesen , A. Wacker , G. Bastard , R. Wallenberg , F. Capasso , V. F. Maisi , L. Samuelson

We calculate the conductance of a quantum wire with two occupied subbands in a presence of a barrier taking into account the interaction between electrons. We extend the renormalization-group equation for the scattering matrix of the…

介观与纳米尺度物理 · 物理学 2015-06-19 A. V. Borin , K. E. Nagaev

Controlled breakdown has recently emerged as a highly appealing technique to fabricate solid-state nanopores for a wide range of biosensing applications. This technique relies on applying an electric field of approximately 0.6-1 V/nm across…

Momentum transfer due to Coulomb interaction between two parallel, two-dimensional, narrow, and spatially separated layers, when a current I_{drive} is driven through one layer, is studied in the presence of a perpendicular magnetic field…

介观与纳米尺度物理 · 物理学 2009-10-30 H. C. W. Tso , D. J. W. Geldart , P. Vasilopoulos

The neutrals in the Earth environment are in fact free and subjected to drag forces (by ions). In this study we show that drag or friction forces in the ionosphere-thermosphere system initiate changes in the plasma flow, neutral wind, and…

空间物理 · 物理学 2014-04-01 Petko Nenovski

We consider a quasi one-dimensional configuration consisting of two small pieces of ferromagnetic material separated by a metallic one and contacted by two metallic leads. A spin-polarized current is injected from one lead. Our goal is to…

介观与纳米尺度物理 · 物理学 2007-06-13 J. Peguiron , M. -S. Choi , C. Bruder

Auto-oscillations of magnetization driven by direct spin current have been previously observed in multiple quasi-zero-dimensional (0D) ferromagnetic systems such as nanomagnets and nanocontacts. Recently, it was shown that pure spin Hall…

We develop a linear theory of electron transport for a system of two identical quantum wires in a wide range of the wire length L, unifying both the ballistic and diffusive transport regimes. The microscopic model, involving the interaction…

介观与纳米尺度物理 · 物理学 2009-10-31 O. E. Raichev , P. Vasilopoulos

We show that an unpolarized electric current incident perpendicular to the plane of a thin ferromagnet can excite a spin-wave instability transverse to the current direction if source and drain contacts are not symmetric. The instability,…

介观与纳米尺度物理 · 物理学 2009-11-10 M. L. Polianski , P. W. Brouwer

We consider the hydrodynamic flow of an electron fluid in a channel formed in a two-dimensional electron gas (2DEG) with no-slip boundary conditions. To generate vorticity in the fluid the flow is influenced by an array of micromagnets on…

介观与纳米尺度物理 · 物理学 2024-05-06 Jack N. Engdahl , Aydın Cem Keser , Thomas Schmidt , Oleg P. Sushkov

We present the linear response matrix for a sliding domain wall in a rotatable magnetic nanowire, which is driven out of equilibrium by temperature and voltage bias, mechanical torque, and magnetic field. An expression for heat-current…

介观与纳米尺度物理 · 物理学 2015-05-14 Gerrit E. W. Bauer , Stefan Bretzel , Arne Brataas , Yaroslav Tserkovnyak

We study spin dependent electron transmission through one- and two-dimensional curved waveguides and quantum dots with account of spin-orbit interaction. We prove that for a transmission through arbitrary structure there is no spin…

介观与纳米尺度物理 · 物理学 2009-11-07 Evgeny N. Bulgakov , Almas. F. Sadreev

We calculate the electron-mediated exchange interaction between two domain walls in magnetic wires. This corresponds to the equilibrium regime and, therefore, the interaction can be additionally controlled by an electric current. The…

介观与纳米尺度物理 · 物理学 2011-11-17 N. Sedlmayr , V. K. Dugaev , M. Inglot , J. Berakdar

We investigate theoretically the dynamics and the charge transport properties of a rod-shaped nano-scale rotor, which is driven by a similar mechanism as the nanomechanical single-electron transistor (NEMSET). We show that a static electric…

介观与纳米尺度物理 · 物理学 2012-06-27 A. Croy , A. Eisfeld

We analyze the short-time behavior of the heat and charge currents through nanoscale conductors exposed to a temperature gradient. To this end, we employ Luttinger's thermomechanical potential to simulate a sudden change of temperature at…

介观与纳米尺度物理 · 物理学 2016-04-25 F. G. Eich , M. Di Ventra , G. Vignale

We predict the electrical generation and injection of domain walls into a ferromagnetic nano-wire without the need of an assisting magnetic field. Our theory shows that above a critical current $j_{c}$ domain walls are injected into the…

介观与纳米尺度物理 · 物理学 2016-07-15 Davi R. Rodrigues , Jairo Sinova , Ar. Abanov

We have measured the statistical properties of magnetic reversal in nanomagnets driven by a spin-polarized current. Like reversal induced by a magnetic field, spin-transfer-driven reversal near room temperature exhibits the properties of…

介观与纳米尺度物理 · 物理学 2009-11-07 E. B. Myers , F. J. Albert , J. C. Saneky , E. Bonet , R. A. Buhrman , D. C. Ralph

We use a combination of analytic calculations and numerical simulations to demonstrate that electrical current flowing through a magnetic bilayer induces dynamical coupling between the layers. The coupling originates from the dependence of…

材料科学 · 物理学 2008-02-13 S. Urazhdin