scholarly journals Kondo effect in the presence of the spin accumulation and non-equilibrium spin currents

2021 ◽  
pp. 168592
Author(s):  
Damian Tomaszewski ◽  
Piotr Busz ◽  
Jan Martinek
Keyword(s):  
Kondo Effect ◽  
Spin Accumulation ◽  
Spin Currents ◽  
Non Equilibrium

Spin accumulation, spin currents, and torque, in the problem of motion of a sharp domain wall in magnetic nanowires

2006 ◽  
Vol 243 (1) ◽  
pp. 193-196
Author(s):  
V. R. Vieira ◽  
V. K. Dugaev ◽  
P. D. Sacramento ◽  
J. Barnaś ◽  
M. A. N. Araújo ◽  
...  
Keyword(s):  
Domain Wall ◽  
Spin Accumulation ◽  
Magnetic Nanowires ◽  
Spin Currents

scholarly journals Predicting the conductance of strongly correlated molecules: the Kondo effect in perchlorotriphenylmethyl/Au junctions

Nanoscale ◽  
2018 ◽  
Vol 10 (37) ◽  
pp. 17738-17750 ◽  
Author(s):  
W. H. Appelt ◽  
A. Droghetti ◽  
L. Chioncel ◽  
M. M. Radonjić ◽  
E. Muñoz ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Perturbation Theory ◽  
First Principles ◽  
Density Functional ◽  
Kondo Effect ◽  
Strongly Correlated ◽  
Functional Theory ◽  
Molecular Conductance ◽  
Non Equilibrium

We predict the non-equilibrium molecular conductance in the Kondo regime from first principles by combining density functional theory with the renormalized super-perturbation theory.

scholarly journals NONLOCAL ELECTRONIC SPIN DETECTION, SPIN ACCUMULATION AND THE SPIN HALL EFFECT

2009 ◽  
Vol 23 (11) ◽  
pp. 2413-2438 ◽  
Author(s):  
SERGIO O. VALENZUELA
Keyword(s):  
Hall Effect ◽  
Spin Diffusion ◽  
Spin Injection ◽  
Spin Hall Effect ◽  
Current Status ◽  
Pure Spin ◽  
Spin Accumulation ◽  
Spin Currents ◽  
Electrical Spin ◽  
Spin Detection

In recent years, electrical spin injection and detection has grown into a lively area of research in the field of spintronics. Spin injection into a paramagnetic material is usually achieved by means of a ferromagnetic source, whereas the induced spin accumulation or associated spin currents are detected by means of a second ferromagnet or the reciprocal spin Hall effect, respectively. This article reviews the current status of this subject, describing both recent progress and well-established results. The emphasis is on experimental techniques and accomplishments that brought about important advances in spin phenomena and possible technological applications. These advances include, amongst others, the characterization of spin diffusion and precession in a variety of materials, such as metals, semiconductors and graphene, the determination of the spin polarization of tunneling electrons as a function of the bias voltage, and the implementation of magnetization reversal in nanoscale ferromagnetic particles with pure spin currents.

Spin currents in semiconductor nanostructures: A non-equilibrium Green-function approach

2017 ◽  
Author(s):  
Branislav K. Nikolic ◽  
Liviu P. Zarbo ◽  
Satofumi Souma
Keyword(s):  
Green Function ◽  
Spin Current ◽  
Semiconductor Nanostructures ◽  
Pure Spin ◽  
Current Operator ◽  
Spin Orbit ◽  
Spin Currents ◽  
Low Dimensional ◽  
Green Function Approach ◽  
Non Equilibrium

This article examines spin currents and spin densities in realistic open semiconductor nanostructures using different tools of quantum-transport theory based on the non-equilibrium Green function (NEGF) approach. It begins with an introduction to the essential theoretical formalism and practical computational techniques before explaining what pure spin current is and how pure spin currents can be generated and detected. It then considers the spin-Hall effect (SHE), and especially the mesoscopic SHE, along with spin-orbit couplings in low-dimensional semiconductors. It also describes spin-current operator, spindensity, and spin accumulation in the presence of intrinsic spin-orbit couplings, as well as the NEGF approach to spin transport in multiterminal spin-orbit-coupled nanostructures. The article concludes by reviewing formal developments with examples drawn from the field of the mesoscopic SHE in low-dimensional spin-orbit-coupled semiconductor nanostructures.

scholarly journals From tunneling to contact in a magnetic atom: The non-equilibrium Kondo effect

2017 ◽  
Vol 146 (9) ◽  
pp. 092309 ◽  
Author(s):  
Deung-Jang Choi ◽  
Paula Abufager ◽  
Laurent Limot ◽  
Nicolás Lorente
Keyword(s):  
Kondo Effect ◽  
Magnetic Atom ◽  
Non Equilibrium

Non-equilibrium Kondo Effect in Electronic Transport through Quantum Dots

2004 ◽  
Vol 54 (S4) ◽  
pp. 615-618 ◽  
Author(s):  
R. Świrkowicz ◽  
M. Wilczyński ◽  
J. Barnaś
Keyword(s):  
Quantum Dots ◽  
Electronic Transport ◽  
Kondo Effect ◽  
Non Equilibrium

scholarly journals Three-body correlations in nonlinear response of correlated quantum liquid

2020 ◽  
Author(s):  
Tokuro Hata ◽  
Yoshimichi Teratani ◽  
Tomonori Arakawa ◽  
Sanghyun Lee ◽  
Meydi Ferrier ◽  
...  
Keyword(s):  
Kondo Effect ◽  
Unitary Limit ◽  
Quantum Liquid ◽  
Perfect Agreement ◽  
Fluctuation Dissipation ◽  
Kondo Systems ◽  
Ring Exchange ◽  
Many Body Systems ◽  
Three Body ◽  
Non Equilibrium

Abstract Understanding the properties of correlated quantum liquids is a fundamental issue of condensed matter physics. Even in such a correlated case, fascinatingly, we can tell that the equilibrium fluctuations of the system govern its linear response to an external field, relying on the fluctuation dissipation relations based on the two-body correlations. Going beyond, up to the three-body correlations, is of importance for van der Waals force [1], the three-body force in nuclei [2], the Efimov state [3, 4], the ring exchange interaction in solid 3He [5, 6], and frustrated spin systems [7]. In our work, we have used a quantum dot in the Kondo regime, which is a controllable realization of such a correlated quantum liquid [8–11]. Thanks to the quality of our sample, where the Kondo effect in the unitary limit was achieved, we could quantitatively measure the three-body correlations and their role in the non-equilibrium regime, in perfect agreement with recent results of the Fermi liquid theory [12– 15]. In particular, we have demonstrated its importance when time-reversal symmetry is broken, solving a long-standing puzzle of the Kondo systems under the magnetic field [13]. The demonstrated method to relate three-body correlation and non-equilibrium transport opens up a way for further investigation of the dynamics of quantum many-body systems.

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