Experimental observation of quantum many-body excitations of E8 symmetry in the Ising chain ferromagnet CoNb2O6Amelin, Kirill; Engelmayer, Johannes; Viirok, Johan; Nagel, Urmas; Rõõm, Toomas; Lorenz, Thomas; Wang, ZhePhysical review B2020 / art. 104431, 5 p. : ill https://doi.org/10.1103/PhysRevB.102.104431

Linear local modes induced by intrinsic localized modes in a monoatomic chainHižnjakov, Vladimir; Shelkan, A.; Klopov, Mihhail; Kiselev, S.A.; Sievers, A.J.Physical review B2006 / p. 224302-1 - 114302-5 https://journals.aps.org/prb/abstract/10.1103/PhysRevB.73.224302

Observation of E8 articles in an Ising chain antiferromagnetZhang, Zao; Amelin, Kirill; Wang, Xiao; Zou, Haiyuan; Yang, Jiahao; Nagel, Urmas; Rõõm, Toomas; Dey, Tusharkanti; Nugroho, Agustinus Agung; Lorenz, Thomas; Wu, Jianda; Wang, ZhePhysical review B2020 / art. 220411, 6 p. : ill https://doi.org/10.1103/PhysRevB.101.220411

Prediction of high-frequency intrinsic localized modes in Ni and NbHaas, Mati; Hižnjakov, Vladimir; Šelkan, Aleksander; Klopov, Mihhail; Sievers, A.J.Physical review B2011 / p. 144303-1 - 144303-8 : ill

Self-consistent potential of intrinsic localized modes : application to diatomic chainShelkan, A.; Hižnjakov, Vladimir; Klopov, MihhailPhysical review B2007 / p. 134304-1 -134304-6 : ill https://journals.aps.org/prb/pdf/10.1103/PhysRevB.75.134304

Spin excitations of magnetoelectric LiNiPO4 in multiple magnetic phasesPeedu, Laur; Kocsis, V.; Szaller, D.; Viirok, Johan; Nagel, Urmas; Rõõm, Toomas; Farkas, D.G.; Bordacs, S.; Kamenskyi, D.L.; Zeitler, U.; Tokunaga, Y.; Taguchi, Y.; Tokura, Y.; Kezsmarki, I.Physical review B2019 / art. 024406, 8 p. : ill https://doi.org/10.1103/PhysRevB.100.024406

Terahertz absorption spectroscopy study of spin waves in orthoferrite YFeO3 in a magnetic fieldAmelin, Kirill; Nagel, Urmas; Fishman, R.S.; Yoshida, Y.; Sim, Hasung; Park, Kisoo; Park, Je-Geun; Rõõm, ToomasPhysical review B2018 / art. 174417, 6 p. : ill https://doi.org/10.1103/PhysRevB.98.174417

Terahertz magneto-optical investigation of quadrupolar spin-lattice effects in magnetically frustrated Tb2Ti2O7Amelin, Kirill; Alexanian, Y.; Nagel, Urmas; Rõõm, Toomas; Robert, J.; Debray, J.; Simonet, V.; Decorse, C.; Wang, Z.; Ballou, R.; Constable, E.; de Brion, SophiePhysical review B2020 / art. 134428, 11 p. : ill https://doi.org/10.1103/PhysRevB.102.134428

Terahertz spectroscopy of spin excitations in magnetoelectric LiFePO4 in high magnetic fieldsPeedu, Laur; Kocsis, V.; Szaller, D.; Forrai, B.; Bordacs, S.; Kezsmarki, I.; Viirok, Johan; Nagel, Urmas; Bernath, B.; Kamenskyi, D.L.; Miyata, A.; Portugall, O.; Tokunaga, Y.; Tokura, Y.; Taguchi, Y.; Rõõm, ToomasPhysical review B2022 / art. 134413, 12 p. : ill https://doi.org/10.1103/PhysRevB.106.134413