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Thermal fluctuation of local magnetization in magnetic metals intercoupled with charge carriers and phonons offers a path to enhance thermoelectric performance. The thermopower enhancement by spin fluctuations (SF) has been observed before.…

材料科学 · 物理学 2021-10-22 Md Mobarak Hossain Polash , Daryoosh Vashaee

Transport and thermoelectric coefficients (including also spin thermopower) of silicene nanoribbons with zigzag edges are investigated by {\it ab-initio} numerical methods. Local spin density of such nanoribbons reveals edge magnetism. Like…

材料科学 · 物理学 2015-06-16 K. Zberecki , M. Wierzbicki , J. Barnaś , R. Swirkowicz

We theoretically consider the spin Seebeck effect, the charge Seebeck coefficient, and the thermoelectric figure of merit in superconducting hybrid structures including either magnetic textures or intrinsic spin-orbit coupling. We…

介观与纳米尺度物理 · 物理学 2017-02-01 Marianne Etzelmüller Bathen , Jacob Linder

We investigate theoretically the Seebeck effect in materials close to a ferromagnetic quantum critical point to explain anomalous behaviour at low temperatures. It is found that the main effect of spin fluctuations is to enhance the…

强关联电子 · 物理学 2015-05-13 Takuya Okabe

The occurrence of inhomogeneous spin-density distribution in multilayered ferromagnetic diluted magnetic semiconductor nanostructures leads to strong dependence of the spin-polarized transport properties on these systems. The spin-dependent…

Spin-related effects in thermoelectricity can be used to design more efficient refrigerators and offer novel promising applications for the harvesting of thermal energy. The key challenge is to design structural and compositional magnetic…

介观与纳米尺度物理 · 物理学 2022-07-08 Flavio Abreu Araujo , Tristan da Câmara Santa Clara Gomes , Luc Piraux

Since the discovery of the giant magnetoresistance (GMR) effect the use of the intrinsic angular momentum of the electrons has opened up new spin based device concepts. The two channel model of spin-up and spin-down electrons with…

介观与纳米尺度物理 · 物理学 2014-12-24 F. K. Dejene , J. Flipse , G. E. W. Bauer , B. J. van Wees

While the thermoelectric materials progress based on the engineering of electronic and phononic characteristics is reaching a plateau, adding the spin degree of freedom has the potential to open a new landscape for alternative…

We present a temperature and magnetic field dependence study of spin transport and magnetothermal corrections to the thermal conductivity in the spin S = 1/2 integrable easy-plane regime Heisenberg chain, extending an earlier analysis based…

强关联电子 · 物理学 2017-08-10 C. Psaroudaki , X. Zotos

We study the spin thermopower in the two-channel spin-1/2 Kondo model which exhibits the phenomenon of impurity spin overscreening and non-Fermi-liquid properties. While magnetic field lower than the Kondo temperature does not strongly…

强关联电子 · 物理学 2013-12-06 Rok Zitko , Jernej Mravlje , Anton Ramsak , Tomaz Rejec

We calculate the thermal and thermoelectric transport coefficients for a two-dimensional spin-density-wave metal in the presence of weak disorder and under an external magnetic field using the Mori-Zwanzig memory matrix formalism. As a…

强关联电子 · 物理学 2019-05-09 Hermann Freire

Anomalous magnetothermal effects are discussed in the spin-1/2 Heisenberg chain. The energy current is related to one of the non-trivial conserved quantities underlying integrability and therefore both the diagonal and off diagonal…

统计力学 · 物理学 2015-06-24 Kazumitsu Sakai , Andreas Klumper

We study thermal transport in one dimensional spin systems both in the presence and absence of impurities. In the absence of disorder, all these spin systems display a temperature dependent Drude peak in the thermal conductivity. In gapless…

强关联电子 · 物理学 2007-05-23 E. Orignac , R. Chitra , R. Citro

Conventional and spin-related thermoelectric effects in transport through a magnetic tunnel junction with a large-spin impurity, such as a magnetic molecule or atom, embedded into the corresponding barrier are studied theoretically in the…

介观与纳米尺度物理 · 物理学 2014-11-11 Maciej Misiorny , Józef Barnaś

We theoretically investigate spin transport in half-metallic ferromagnets at finite temperatures. The side-jump and skew-scattering contributions to spin Hall conductivity are derived using the Kubo formula. The electron-magnon interaction…

材料科学 · 物理学 2016-11-08 Y. Ohnuma , M. Matsuo , S. Maekawa

The main contribution of this paper is to study the spin caloritronic effects in defected graphene/silicene nanoribbon (GSNR) junctions. Each step-like GSNR is subjected to the ferromagnetic exchange and local external electric fields, and…

介观与纳米尺度物理 · 物理学 2021-07-29 Zainab Gholami , Farhad Khoeini

Spin-transfer is a typical spintronics effect that allows a ferromagnetic layer to be switched by spin-injection. Most of the experimental results about spin transfer are described on the basis of the Landau-Lifshitz-Gilbert equation of the…

材料科学 · 物理学 2015-06-25 J. -E. Wegrowe , C. Ciornei , H. -J. Drouhin

We use the Boltzmann transport theory in the relaxation time approximation to describe the thermal transport of spin waves in a ferromagnet. By treating spin waves as magnon excitations we are able to compute analytically and numerically…

材料科学 · 物理学 2018-09-05 Vittorio Basso , Elena Ferraro , Marco Piazzi

It has recently been proposed and experimentally demonstrated that it is possible to generate large thermoelectric effects in ferromagnet/superconductor structures due to a spin-dependent particle-hole asymmetry. Here, we theoretically show…

超导电性 · 物理学 2016-06-15 Jacob Linder , Marianne Etzelmüller Bathen

By an exact analytical approach we study the magnetothermal transport in the spin-1/2 easy-axis Heisenberg model, in particular the thermal conductivity and spin Seebeck effect as a function of anisotropy, magnetic field and temperature. We…

强关联电子 · 物理学 2024-02-05 X. Zotos