Electron–electron interaction induced spin thermalization in quasi-low-dimensional spin valves

Heikkilä, Tero T.; Hatami, Moosa; Bauer, G.

doi:10.1016/j.ssc.2009.12.015

Cited by 8 publications

(8 citation statements)

References 10 publications

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“…This is a consequence of the implicit assumption that there is no spin temperature (gradient) T s = T (↑) − T (↓) due to effective interspin and electron-phonon scattering [12]. This approximation does not necessarily hold at the nanoscale and low temperatures [14,15]. Although initial experiments were inconclusive, a lateral spin valve device has been proposed in which it should be possible to detect spin temperatures.…”

Section: Mes-hall] 21 Jul 2011mentioning

confidence: 99%

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Spin caloritronics

2012

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Section: Mes-hall] 21 Jul 2011mentioning

confidence: 99%

“…In contrast to the GMR, the magnetoheat resistance is very sensitive to inelastic (interspin and electron-phonon) scattering [14,15].…”

Section: Magneto-heat Resistancementioning

confidence: 99%

Spin caloritronics

2012

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“…Similar to equation ( 24), the Hall corrections in equation ( 29) should be significant only when Σ xx vanishes for w = 0.125. However, experimentally it might be difficult to separate the thermopowers equations ( 29) and (24).…”

Section: Spin Temperature Gradientmentioning

confidence: 99%

Seebeck effect in nanomagnets

Fedorov

Gradhand

Tauber

et al. 2021

J. Phys.: Condens. Matter

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We present a theory of the Seebeck effect in nanomagnets with dimensions smaller than the spin diffusion length, showing that the spin accumulation generated by a temperature gradient strongly affects the thermopower. We also identify a correction arising from the transverse temperature gradient induced by the anomalous Ettingshausen effect and an induced spin-heat accumulation gradient. The relevance of these effects for nanoscale magnets is illustrated by ab initio calculations on dilute magnetic alloys.

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“…29 Therefore, the values of V Tmeter directly reflect T A . 37 The heater has been calibrated by acquiring the current-to-voltage characteristic of the tunnel junction at the different values of T bath . In particular, the injected power is given by P in ¼ 0:5V heater I heater , where the factor 0.5 stems from the fact that the heat is equally dissipated on the two sides of the junction.…”

Section: Journal Of Applied Physicsmentioning

confidence: 99%

Development of highly sensitive nanoscale transition edge sensors for gigahertz astronomy and dark matter search

Paolucci

Buccheri

Germanese

et al. 2020

Journal of Applied Physics

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Terahertz (THz) and sub-terahertz (sub-THz) band detection has a key role in both fundamental interactions physics and technological applications, such as medical imaging, industrial quality control, and homeland security. In particular, transition edge sensors (TESs) and kinetic inductance detectors (KIDs) are the most employed bolometers and calorimeters in the THz and sub-THz band for astrophysics and astroparticles research. Here, we present the electronic, thermal, and spectral characterization of an aluminum/ copper bilayer sensing structure that, thanks to its thermal properties and a simple miniaturized design, could be considered a perfect candidate to realize an extremely sensitive class of nanoscale TES (nano-TES) for the giga-terahertz band. Indeed, thanks to the reduced dimensionality of the active region and the efficient Andreev mirror heat confinement, our devices are predicted to reach state-of-the-art TES performance. In particular, as a bolometer the nano-TES is expected to have a noise equivalent power of 5 Â 10 À20 W/ ffiffiffiffiffiffi Hz p and a relaxation time of 10 ns for the sub-THz band, typical of cosmic microwave background studies. When operated as a single-photon sensor, the devices are expected to show a remarkable frequency resolution of 100 GHz, pointing toward the necessary energy sensitivity requested in laboratory axion search experiments. Finally, different multiplexing schemes are proposed and sized for imaging applications.

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Electron–electron interaction induced spin thermalization in quasi-low-dimensional spin valves

Cited by 8 publications

References 10 publications

Spin caloritronics

Spin caloritronics

Seebeck effect in nanomagnets

Development of highly sensitive nanoscale transition edge sensors for gigahertz astronomy and dark matter search

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