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Domain wall dynamic...
Domain wall dynamics due to femtosecond laser-induced superdiffusive spin transport
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- Balaz, Pavel (författare)
- Charles Univ Prague, Fac Math & Plns, Dept Condensed Matter Phys, Ke Karlovu 5, CZ-12116 Prague, Czech Republic.;VSB Tech Univ Ostrava, IT4Innovat Ctr, 17 Listopadu 15, CZ-70833 Ostrava, Czech Republic.
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- Carva, Karel (författare)
- Charles Univ Prague, Fac Math & Plns, Dept Condensed Matter Phys, Ke Karlovu 5, CZ-12116 Prague, Czech Republic.
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- Ritzmann, Ulrike (författare)
- Uppsala universitet,Materialteori,Free Univ Berlin, Dept Phys, Arnimallee 14, D-14195 Berlin, Germany.
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- Maldonado, Pablo (författare)
- Uppsala universitet,Materialteori
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- Oppeneer, Peter M. (författare)
- Uppsala universitet,Materialteori,Free Univ Berlin, Dept Phys, Arnimallee 14, D-14195 Berlin, Germany.
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Charles Univ Prague, Fac Math & Plns, Dept Condensed Matter Phys, Ke Karlovu 5, CZ-12116 Prague, Czech Republic;VSB Tech Univ Ostrava, IT4Innovat Ctr, 17 Listopadu 15, CZ-70833 Ostrava, Czech Republic. Charles Univ Prague, Fac Math & Plns, Dept Condensed Matter Phys, Ke Karlovu 5, CZ-12116 Prague, Czech Republic. (creator_code:org_t)
- AMER PHYSICAL SOC, 2020
- 2020
- Engelska.
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Ingår i: Physical Review B. - : AMER PHYSICAL SOC. - 2469-9950 .- 2469-9969. ; 101:17
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
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- Manipulation of magnetic domain walls via a helicity-independent laser pulse has recently been experimentally demonstrated and various physical mechanisms leading to domain wall dynamics have been discussed. Spin-dependent superdiffusive transport of hot electrons has been identified as one of the possible ways to affect a magnetic domain wall. Here, we develop a model based on superdiffusive spin-dependent transport to study the laser-induced transport of hot electrons through a smooth magnetic domain wall. We show that the spin transfer between neighboring domains can enhance ultrafast demagnetization in the domain wall. More importantly, our calculations reveal that when the laser pulse is properly focused onto the vicinity of the domain wall, it can excite sufficiently strong spin currents to generate a spin-transfer torque that can rapidly move the magnetic domain wall by several nanometers in several hundred femtoseconds, leading to a huge nonequilibrium domain wall velocity.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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