Zobrazeno 1 - 10
of 189
pro vyhledávání: '"Nisoli C"'
Autor:
Goryca, M., Zhang, X., Ramberger, J., Watts, J. D., Nisoli, C., Leighton, C., Schiffer, P., Crooker, S. A.
Publikováno v:
PNAS 120, e2310777120 (2023)
Direct detection of spontaneous spin fluctuations, or "magnetization noise", is emerging as a powerful means of revealing and studying magnetic excitations in both natural and artificial frustrated magnets. Depending on the lattice and nature of the
Externí odkaz:
http://arxiv.org/abs/2311.07801
Applied magnetic fields are an important tuning parameter for artificial spin ice (ASI) systems, as they can drive phase transitions between different magnetic ground states, or tune through regimes with high populations of emergent magnetic excitati
Externí odkaz:
http://arxiv.org/abs/2202.12486
Publikováno v:
New J. Phys. 24, 033033 (2022)
Using continuum simulations, we show that under a sinusoidal electric field, liquid crystal skyrmions undergo periodic shape oscillations which produce controlled directed motion. The speed of the skyrmion is non-monotonic in the frequency of the app
Externí odkaz:
http://arxiv.org/abs/2112.04562
Autor:
Teixeira, H.A., Bernardo, M.F., Nascimento, F.S., Saccone, M.D., Caravelli, F., Nisoli, C., de Araujo, C.I.L.
Publikováno v:
In Journal of Magnetism and Magnetic Materials 15 April 2024 596
Autor:
Goryca, M., Zhang, X., Li, J., Balk, A. L., Watts, J. D., Leighton, C., Nisoli, C., Schiffer, P., Crooker, S. A.
Publikováno v:
Phys. Rev. X 11, 011042 (2021)
Artificial spin ices (ASIs) are interacting arrays of lithographically-defined nanomagnets in which novel frustrated magnetic phases can be intentionally designed. A key emergent description of fundamental excitations in ASIs is that of magnetic mono
Externí odkaz:
http://arxiv.org/abs/2008.08635
Publikováno v:
Soft Matter 16, 3338 (2020)
Using continuum based simulations we show that a rich variety of skyrmion liquid crystal states can be realized in the presence of a periodic obstacle array. As a function of the number of skyrmions per obstacle we find hexagonal, square, dimer, trim
Externí odkaz:
http://arxiv.org/abs/1911.10270
Publikováno v:
Phys. Rev. Research 2, 033433 (2020)
Artificial spin ices are ideal frustrated model systems in which to explore or design emergent phenomena with unprecedented characterization of the constituent degrees of freedom. In square spin ice, violations of the ice rule are topological excitat
Externí odkaz:
http://arxiv.org/abs/1908.05328
Publikováno v:
Phys. Rev. Lett. 120, 027204 (2018)
Using numerical simulations that mimic recent experiments on hexagonal colloidal ice, we show that colloidal hexagonal artificial spin ice exhibits an inner phase within its ice state that has not been observed previously. Under increasing colloid-co
Externí odkaz:
http://arxiv.org/abs/1712.01783
Autor:
Loreto, R. P., Nascimento, F. S., Gonçalves, R. S., Borme, J., Cezar, J. C., Nisoli, C., Pereira, A. R., de Araujo, C. I. L.
Publikováno v:
R P Loreto et al. J. Phys.: Condens. Matter 31 025301 (2019)
In this work, we explore a kind of geometrical effect in the thermodynamics of artificial spin ices (ASI). In general, such artificial materials are athermal. Here, We demonstrate that geometrically driven dynamics in ASI can open up the panorama of
Externí odkaz:
http://arxiv.org/abs/1710.03058
Publikováno v:
Sci. Rep. 7, 651 (2017)
We demonstrate the use of an external field to stabilize and control defect lines connecting topological monopoles in spin ice. For definiteness we perform Brownian dynamics simulations with realistic units mimicking experimentally realized artificia
Externí odkaz:
http://arxiv.org/abs/1609.02129