Zobrazeno 1 - 7
of 7
pro vyhledávání: '"Viirok, Johan"'
Autor:
Kocsis, Vilmos, Bordács, Sándor, Tokunaga, Yusuke, Viirok, Johan, Peedu, Laur, Rõõm, Toomas, Nagel, Urmas, Taguchi, Yasujiro, Tokura, Yoshinori, Kézsmárki, István
Publikováno v:
Phys. Rev. B 100, 155124 (2019)
We have studied spin excitations in a single-domain crystal of antiferromagnetic LiCoPO4 by THz absorption spectroscopy. By analyzing the selection rules and comparing the strengths of the absorption peaks in the different antiferromagnetic domains,
Externí odkaz:
http://arxiv.org/abs/2102.00994
Autor:
Rõõm, Toomas, Viirok, Johan, Peedu, Laur, Nagel, Urmas, Farkas, Daniel G., Szaller, David, Kocsis, Vilmos, Bordács, Sandor, Kézsmárki, Istvan, Kamenskyi, Dymtro L., Engelkamp, Hans, Ozerov, Mike, Smirnov, Dmitry, Krzystek, Jurek, Thirunavukkuarasu, Komalavalli, Ozaki, Yasuko, Tomioka, Yasuhide, Ito, Toshimitsu, Datta, Trinanjan, Fishman, Randy S.
Publikováno v:
Phys. Rev. B 102, 214410 (2020)
Using THz spectroscopy, we show that the spin-wave spectrum of multiferroic BiFeO$_3$ in its high-field canted antiferromagnetic state is well described by a spin model that violates rhombohedral symmetry. We demonstrate that the monoclinic distortio
Externí odkaz:
http://arxiv.org/abs/2012.09178
Autor:
Amelin, Kirill, Engelmayer, Johannes, Viirok, Johan, Nagel, Urmas, Rõõm, Toomas, Lorenz, Thomas, Wang, Zhe
Publikováno v:
Phys. Rev. B 102, 104431 (2020)
Close to the quantum critical point of the transverse-field Ising spin-chain model, an exotic dynamic spectrum was predicted to emerge upon a perturbative longitudinal field. The dynamic spectrum consists of eight particles and is governed by the sym
Externí odkaz:
http://arxiv.org/abs/2006.12956
Autor:
Peedu, Laur, Kocsis, Vilmos, Szaller, Dávid, Viirok, Johan, Nagel, Urmas, Rõõm, Toomas, Farkas, Dániel Gergely, Bordács, Sándor, Kamenskyi, Dmytro, Zeitler, Uli, Tokunaga, Yusuke, Taguchi, Yasujiro, Tokura, Yoshinori, Kézsmárki, István
Publikováno v:
Phys. Rev. B 100, 024406 (2019)
Spin excitations of magnetoelectric LiNiPO$_4$ are studied by infrared absorption spectroscopy in the THz spectral range as a function of magnetic field through various commensurate and incommensurate magnetically ordered phases up to 33\,T. Six spin
Externí odkaz:
http://arxiv.org/abs/1904.06106
Akademický článek
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Autor:
Amelin, Kirill, Viirok, Johan, Nagel, Urmas, Rõõm, Toomas, Engelmayer, Johannes, Dey, Tusharkanti, Agung Nugroho, Agustinus, Lorenz, Thomas, Wang, Zhe
We report on high-resolution terahertz spectroscopic studies of quantum spin dynamics in the quasi-one-dimensional Ising-like ferromagnet CoNb2O6 and antiferromagnet BaCo2V2O8 as a function of an applied transverse magnetic field. In the ordered phas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dcf2abc9e7a4af9570ac4c244ab866a5
http://hdl.handle.net/2003/41252
http://hdl.handle.net/2003/41252