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We investigate magneto-transport properties of a $\theta$ shaped three-arm mesoscopic ring where the upper and lower sub-rings are threaded by Aharonov-Bohm fluxes $\phi_1$ and $\phi_2$, respectively, within a non-interacting electron…

介观与纳米尺度物理 · 物理学 2013-07-02 Srilekha Saha , Santanu K. Maiti , S. N. Karmakar

By applying non-equilibrium Green's function formulation combined with first-principles density functional theory,we explore the electronic transport properties of indolinospironaphthoxazine (SO)/indolinomeronaphthoxazine (MO).The results…

介观与纳米尺度物理 · 物理学 2015-06-16 H. Zhao , Y. Q. Xu , W. K. Zhao , K. Gao

Electrically stimulated switching of a charge injection barrier at the interface between an organic semiconductor and an electrode modified with a disordered monolayer (DM) is studied by using various benzenethiol derivatives as DM…

材料科学 · 物理学 2016-08-04 Ryo Nouchi , Takaaki Tanimoto

We theoretically study the spin dynamics in antiferromagnets (AFs)under the influence of an electric current. We identify two different sources of spin-transfer torques that stem from uniform (${\boldsymbol v}_n$) and staggered…

介观与纳米尺度物理 · 物理学 2021-10-04 Jotaro J. Nakane , Hiroshi Kohno

Electronic transport characteristics through a single phenalenyl molecule sandwiched between two metallic electrodes are investigated by the use of Green's function technique. A parametric approach, based on the tight-binding model, is used…

介观与纳米尺度物理 · 物理学 2009-11-06 Santanu K. Maiti

Asymmetric i/V curves with respect to the polarity of the voltage bias were observed in the Hg-Au junctions containing bilayers of alkanethiols of different chain length. Larger current resulted when a negative bias was applied to the metal…

介观与纳米尺度物理 · 物理学 2007-05-23 Michael Galperin , Abraham Nitzan , Slawomir Sek , Marcin Majda

The origin of anomalous resistivity peak and accompanied sign reversal of Hall resistivity of ZrTe$_5$ has been under debate for a long time. Although various theoretical models have been proposed to account for these intriguing transport…

材料科学 · 物理学 2025-09-23 Hanqi Pi , Shengnan Zhang , Yang Xu , Zhong Fang , Hongming Weng , Quansheng Wu

The transient processes of electron transport in nano-scale devices exhibit special phenomena that exist only in the transient regime. Besides how fast the steady states are approached, one interesting aspect of transient transport arises…

介观与纳米尺度物理 · 物理学 2016-04-01 Matisse Wei-Yuan Tu , Amnon Aharony , Ora Entin-Wohlman , Avraham Schiller , Wei-Min Zhang

We present a detailed study of the first simple mechanical system that shows fully realistic transport behavior while still being exactly solvable at the level of equilibrium statistical mechanics. The system under consideration is a…

统计力学 · 物理学 2009-09-29 H. Larralde , F. Leyvraz , C. Mejia-Monasterio

Magneto-transport properties in closed and open loop structures are carefully reviewed within a tight-binding formalism. A novel mesoscopic phenomenon where a non-vanishing current is observed in a conducting loop upon the application of an…

介观与纳米尺度物理 · 物理学 2015-08-13 Paramita Dutta , Santanu K. Maiti

We investigate magnetization dynamics in a spin-Hall oscillator using a direct current measurement as well as conventional microwave spectrum analysis. When the current applies an anti-damping spin-transfer torque, we observe a change in…

介观与纳米尺度物理 · 物理学 2016-05-25 S. Langenfeld , V. Tshitoyan , Z. Fang , A. Wells , T. A. Moore , A. J. Ferguson

A novel mechanism for switching a molecular junction based on a proton transfer reaction triggered by an external electrostatic field is proposed. As a specific example to demonstrate the feasibility of the mechanism, the tautomers…

介观与纳米尺度物理 · 物理学 2014-04-18 C. Hofmeister , R. Härtle , O. Rubio-Pons , P. B. Coto , A. L. Sobolewski , M. Thoss

Electronic transport in narrow gap semiconductors is characterized by spontaneous vertical transitions between carriers in the valence and conduction bands, a phenomenon also known as Zener tunneling. However, this effect is not captured by…

材料科学 · 物理学 2021-04-21 Andrea Cepellotti , Boris Kozinsky

Magneto-transport properties are investigated in a binary alloy ring subjected to an Aharonov-Bohm (AB) flux \phi within a single-band non-interacting tight-binding framework. In the first part, we expose analytically the behavior of…

介观与纳米尺度物理 · 物理学 2012-04-10 Paramita Dutta , Santanu K. Maiti , S. N. Karmakar

The effect of orbital degrees of freedom on the exchange interactions in the spin-1 quasi-one-dimensional antiferromagnet CaV2O4 is systematically studied. For this purpose a realistic low-energy model with the parameters derived from the…

材料科学 · 物理学 2015-06-23 Z. V. Pchelkina , I. V. Solovyev

Recently, methanol was identified as a sensitive target system to probe variations of the proton-to-electron mass ratio $\mu$ [Jansen \emph{et al.} Phys. Rev. Lett. \textbf{106}, 100801 (2011)]. The high sensitivity of methanol originates…

化学物理 · 物理学 2012-03-07 Paul Jansen , Isabelle Kleiner , Li-Hong Xu , Wim Ubachs , Hendrick L. Bethlem

A few electron double electrostatic lateral quantum dot can be transformed into a few electron triple quantum dot by applying a different combination of gate voltages. Quadruple points have been achieved at which all three dots are…

介观与纳米尺度物理 · 物理学 2009-11-11 L. Gaudreau , A. S. Sachrajda , S. Studenikin , P. Zawadzki , A. Kam , J. Lapointe

We report the inclusion of electron-electron correlation in the calculation of transport properties within an ab initio scheme. A key step is the reformulation of Landauer's approach in terms of an effective transmittance for the…

强关联电子 · 物理学 2009-11-10 A. Ferretti , A. Calzolari , R. Di Felice , F. Manghi , M. J. Caldas , M. Buongiorno Nardelli , E. Molinari

We numerically study the non-local transport signature in Weyl semimetal as a test for interconnectedness of the surface states, using a recursive Green's function method. We drive a current using two leads connected on the same surface…

介观与纳米尺度物理 · 物理学 2018-12-14 Keshav Pareek , Arijit Kundu

It was observed in recent experiments that the current-voltage characteristics (IV) of BPDN-DT (bipyridyl- dinitro- oligophenylene- ethynylene- dithiol) can be switched in a very controlled manner between "on" and "off" traces by applying a…

介观与纳米尺度物理 · 物理学 2009-06-26 Velimir Meded , Alexei Bagrets , Andreas Arnold , Ferdinand Evers