Zobrazeno 1 - 10
of 87
pro vyhledávání: '"Stamenova, Maria"'
Publikováno v:
Phys. Rev. Lett. 131, 206302 (2023)
We show through non-equilibrium non-adiabatic electron-spin-lattice simulations that above a critical current in magnetic atomic wires with a narrow domain wall (DW), a couple of atomic spaces in width, the electron flow triggers violent stimulated e
Externí odkaz:
http://arxiv.org/abs/2303.12879
We report on first-principles spin-polarised quantum transport calculations (from NEGF+DFT) in MgO-spaced magnetic tunnel junctions (MTJs) based on two different Mn-based Heusler ferrimagnetic metals, namely Mn$_3$Al and Mn$_3$Ga in their tetragonal
Externí odkaz:
http://arxiv.org/abs/2301.08300
Autor:
Stamenova, Maria, Stamenov, Plamen, Mahfouzi, Farzad, Sun, Quilong, Kioussis, Nicholas, Sanvito, Stefano
Publikováno v:
Phys. Rev. B 103, 094403 (2021)
We report on first-principles calculations of spin-transfer torque (STT) in epitaxial magnetic tunnel junctions (MTJs) based on ferrimagnetic tetragonal Mn$_3$Ga electrodes, both as analyzer in an Fe/MgO stack, and also in an analogous stack with a s
Externí odkaz:
http://arxiv.org/abs/2009.14095
Publikováno v:
Phys. Rev. B 96, 224410 (2017)
There exists a significant challenge in developing efficient magnetic tunnel junctions with low write currents for non-volatile memory devices. With the aim of analysing potential materials for efficient current-operated magnetic junctions we have de
Externí odkaz:
http://arxiv.org/abs/1710.00574
Publikováno v:
Phys. Rev. B 96, 054411 (2017)
The ultrafast response to an optical pulse excitation of the spin-spin exchange interaction in transition metal anti-ferromagnets is studied within the framework of the time-dependent spin-density functional theory. We propose a formulation for the p
Externí odkaz:
http://arxiv.org/abs/1702.00375
In a straightforward application of molecular nanospintronics to quantum computing, single-molecule spin transistors can be used to measure and control nuclear spin qubits. A jump in the conductance occurs when the electronic spin inverts its polariz
Externí odkaz:
http://arxiv.org/abs/1612.08017
Publikováno v:
Phys. Rev. B 95, 060403 (2017)
We demonstrate that an all-antiferromagnetic tunnel junction with current perpendicular to the plane geometry can be used as an efficient spintronics device with potential high frequency operation. By using state-of-the-art density functional theory
Externí odkaz:
http://arxiv.org/abs/1611.07445
Autor:
Alekhin, Alexandr, Razdolski, Ilya, Ilin, Nikita, Meyburg, Jan P., Diesing, Detlef, Roddatis, Vladimir, Rungger, Ivan, Stamenova, Maria, Sanvito, Stefano, Bovensiepen, Uwe, Melnikov, Alexey
Publikováno v:
Phys. Rev. Lett. 119, 017202 (2017)
Using the sensitivity of magneto-induced second harmonic generation to spin currents (SC), we demonstrate in Fe/Au/Fe/MgO(001) pseudo spin valves the generation of 250 fs-long SC pulses. Their temporal profile indicates that superdiffusive hot electr
Externí odkaz:
http://arxiv.org/abs/1606.03614
Publikováno v:
Phys. Rev. B 95, 024412 (2017)
Starting from the continuity equation for the magnetization in time-dependent spin-density functional theory, we derive an expression for the effective time-dependent magnetic fields driving the out-of-equilibrium spin dynamics in magnetic systems. W
Externí odkaz:
http://arxiv.org/abs/1604.06262
Publikováno v:
Phys. Rev. B 94, 014423 (2016)
The ultra-fast demagnetization of small iron clusters initiated by an intense optical excitation is studied with time-dependent spin density functional theory (TDSDFT). In particular we investigate the effect of the spin-orbit interaction on the onse
Externí odkaz:
http://arxiv.org/abs/1511.00864