Zobrazeno 1 - 10
of 190
pro vyhledávání: '"Nikolic, Branislav K."'
Autor:
Kefayati, Ali, Ren, Yafei, Jungfleisch, M. Benjamin, Gundlach, Lars, Xiao, John Q., Nikolic, Branislav K.
Spin current flowing between femtosecond laser pulse (fsLP)-driven ferromagnetic metal and adjacent normal metal (NM) hosting strong spin-orbit coupling is invariably invoked to explain THz radiation believed to be emitted solely by NM layer. Despite
Externí odkaz:
http://arxiv.org/abs/2410.07360
Autor:
Joao, Simao M., Petrovic, Marko D., Lopes, J. M. Viana Parente, Ferreira, Aires, Nikolic, Branislav K.
Quantum transport studies of spin-dependent phenomena in solids commonly employ the Kubo or Keldysh formulas for the steady-state density matrix in the linear-response regime. Its trace with operators of interest -- such as, spin density, spin curren
Externí odkaz:
http://arxiv.org/abs/2408.16611
Autor:
Waintal, Xavier, Wimmer, Michael, Akhmerov, Anton, Groth, Christoph, Nikolic, Branislav K., Istas, Mathieu, Rosdahl, Tómas Örn, Varjas, Daniel
This review is devoted to the different techniques that have been developed to compute the coherent transport properties of quantum nanoelectronic systems connected to electrodes. Beside a review of the different algorithms proposed in the literature
Externí odkaz:
http://arxiv.org/abs/2407.16257
Autor:
To, D. Quang, Garcia-Gaitan, Federico, Ren, Yafei, Zide, Joshua M. O., Xiao, John Q., Nikolić, Branislav K., Bryant, Garnett W., Doty, Matthew F.
We introduce a quantum mechanical formalism for computing the electric polarization arising in two-dimensional (2D) antiferromagnets (AFMs) as a result of {\bf both} spin and orbital transport effect of magnons. We first show that an applied temperat
Externí odkaz:
http://arxiv.org/abs/2407.16004
Autor:
Reyes-Osorio, Felipe, Garcia-Gaitan, Federico, Strachan, David J., Plechac, Petr, Clark, Stephen R., Nikolic, Branislav K.
We develop a Schwinger-Keldysh field theory (SKFT) for open quantum systems interacting with a dissipative environment and apply it to the spin-boson model as an archetypical example where the environment is composed of a bosonic bath. Prior SKFT dev
Externí odkaz:
http://arxiv.org/abs/2405.00765
Autor:
Varela-Manjarres, Jalil, Kefayati, Ali, Jungfleisch, M. Benjamin, Xiao, John Q., Nikolic, Branislav K.
Publikováno v:
Phys. Rev. B 110, L060410 (2024)
The surprising discovery of ultrafast demagnetization -- where electric field of femtosecond laser pulse couples to electrons of a ferromagnetic (FM) layer causing its magnetization vector {\em to shrink while not rotating}, is also assumed to be acc
Externí odkaz:
http://arxiv.org/abs/2404.00779
The energy-momentum dispersion of magnons, viewed as noninteracting and infinitely long-lived quasiparticles describing collective low-energy excitations of magnetic materials, is often presented as sharp bands obtained from the effective quantum spi
Externí odkaz:
http://arxiv.org/abs/2402.19433
Understanding spin wave (SW) damping, and how to control it to the point of being able to amplify SW-mediated signals, is one of the key requirements to bring the envisaged magnonic technologies to fruition. Even widely used magnetic insulators with
Externí odkaz:
http://arxiv.org/abs/2312.09140
Autor:
Kefayati, Ali, Nikolic, Branislav K.
Publikováno v:
Phys. Rev. Lett. 133, 136704 (2024)
Microscopic origins of charge currents and electromagnetic (EM) radiation generated by them in spintronic THz emitters -- such as, femtosecond laser pulse-driven single magnetic layer or its heterostructures with a nonmagnetic layer hosting strong sp
Externí odkaz:
http://arxiv.org/abs/2312.04476
Publikováno v:
Phys. Rev. B 108, 235166 (2023)
We present a DFT-based investigation of the twist-angle dependent proximity spin-orbit coupling (SOC) in graphene/TMDC structures. We find that for Mo-based TMDCs the proximity valley-Zeeman SOC exhibits a maximum at around 15--20{\deg}, and vanishes
Externí odkaz:
http://arxiv.org/abs/2310.17907