Zobrazeno 1 - 10
of 274
pro vyhledávání: '"Portugall O"'
Autor:
Peedu, L., Kocsis, V., Szaller, D., Forrai, B., Bordács, S., Kézsmárki, I., Viirok, J., Nagel, U., Bernáth, B., Kamenskyi, D. L., Miyata, A., Portugall, O., Tokunaga, Y., Tokura, Y., Taguchi, Y., Rõõm, T.
We investigated the spin excitations of magnetoelectric $\text{LiFePO}_4$ by THz absorption spectroscopy in magnetic fields up to 33$\,$T. By studying their selection rules, we found not only magnetic-dipole, but also electric-dipole active (electrom
Externí odkaz:
http://arxiv.org/abs/2204.12967
Autor:
Miyata, A., Suwa, H., Nomura, T., Prodan, L., Felea, V., Skourski, Y., Deisenhofer, J., von Nidda, H. -A. Krug, Portugall, O., Zherlitsyn, S., Tsurkan, V., Wosnitza, J., Loidl, A.
Publikováno v:
Phys. Rev. B 101, 054432 (2020)
In antiferromagnets, the interplay of spin frustration and spin-lattice coupling has been extensively studied as the source of complex spin patterns and exotic magnetism. Here, we demonstrate that, although neglected in the past, the spin-lattice cou
Externí odkaz:
http://arxiv.org/abs/1911.12103
Autor:
Opherden, L., Herrmannsdörfer, T., Uhlarz, M., Gorbunov, D. I., Miyata, A., Portugall, O., Ishii, I., Suzuki, T., Kaneko, H., Suzuki, H., Wosnitza, J.
We report that the local Ising anisotropy in pyrochlore oxides - the crucial requirement for realizing the spin-ice state - can be broken by means of high magnetic fields. For the case of the well-established classical spin-ice compound Ho$_2$Ti$_2$O
Externí odkaz:
http://arxiv.org/abs/1902.02990
Autor:
Revet, G., Chen, S. N., Bonito, R., Khiar, B., Filippov, E., Argiroffi, C., Higginson, D. P., Orlando, S., Béard, J., Blecher, M., Borghesi, M., Burdonov, K., Khaghani, D., Naughton, K., Pépin, H., Portugall, O., Riquier, R., Rodriguez, R., Ryazantsev, S. N., Skobelev, I. Yu., Soloviev, A., Willi, O., Pikuz, S., Ciardi, A., Fuchs, J.
Accretion dynamics in the forming of young stars is still object of debate because of limitations in observations and modelling. Through scaled laboratory experiments of collimated plasma accretion onto a solid in the presence of a magnetic field, we
Externí odkaz:
http://arxiv.org/abs/1708.02528
Autor:
Yang, Z., Surrente, A., Galkowski, K., Miyata, A., Portugall, O., Sutton, R. J., Haghighirad, A. A., Snaith, H. J., Maude, D. K., Plochocka, P., Nicholas, R. J.
Perovskite solar cells with record power conversion efficiency are fabricated by alloying both hybrid and fully inorganic compounds. While the basic electronic properties of the hybrid perovskites are now well understood, key electronic parameters fo
Externí odkaz:
http://arxiv.org/abs/1706.04489
Autor:
Miyata, A., Yang, Z., Surrente, A., Drachenko, O., Maude, D. K., Portugall, O., Duffy, L. B., Hesjedal, T., Plochocka, P., Nicholas, R. J.
Publikováno v:
Phys. Rev. B 96, 121111 (2017)
We have investigated the band structure at the $\Gamma$ point of the three-dimensional (3D) topological insulator Bi$_2$Se$_3$ using magneto-spectroscopy over a wide range of energies ($0.55-2.2$\,eV) and in ultrahigh magnetic fields up to 150\,T. At
Externí odkaz:
http://arxiv.org/abs/1706.00781
We report studies of the magnetospectroscopy of graphite into a new regime of high energies and ultra-high magnetic fields which allows us to perform the first spectroscopic studies of the interlayer split off bands, $E_{1}$ and $E_{2}$. These bands
Externí odkaz:
http://arxiv.org/abs/1305.2359
The generation of astrophysically relevant jets, from magnetically collimated, laser-produced plasmas, is investigated through three-dimensional, magneto-hydrodynamic simulations. We show that for laser intensities I ~ 10^12 - 10^14 W/cm^2, a magneti
Externí odkaz:
http://arxiv.org/abs/1212.2805
Autor:
Plochocka, P., Portugall, O., Solane, P. Y., Gheeraert, E., Ranno, L., Bustarret, E., Bruyant, N., Breslavetz, I., Maude, D. K., Kanda, H., Rikken, G. L. J. A.
A magneto-optical study of the 1.4 eV Ni color center in boron-free synthetic diamond, grown at high pressure and high temperature, has been performed in magnetic fields up to 56 T. The data is interpreted using the effective spin Hamiltonian of Naza
Externí odkaz:
http://arxiv.org/abs/1203.0913
Autor:
Plochocka, P., Solane, P. Y., Nicholas, R. J., Schneider, J. M., Piot, B. A., Maude, D. K., Portugall, O., Rikken, G. L. J. A.
The electron hole asymmetry has been measured in natural graphite using magneto-optical absorption measurements. A splitting is observed for the transitions at both the $K$-point and the $H$-point of the Brillouin zone of graphite where the effect of
Externí odkaz:
http://arxiv.org/abs/1111.2676