Vilmos Kocsis, Karlo Penc, Toomas Rõõm, Urmas Nagel, Jakub Vit, Judit Romhanyi, Yusuke Tokunaga, Yasujiro Taguchi, Yoshinori Tokura, Istvan Kezsmarki, and Sandor Bordacs. Identification of antiferromagnetic domains via the optical magnetoelectric effect. Phys. Rev. Lett., 121:057601, 2018
Randy S. Fishman, Jaime A. Fernandez-Baca, and Toomas Rõõm. Spin-Wave Theory and its Applications to Neutron Scattering and THz Spectroscopy. IOP Concise Physics, Morgan and Claypool Publishers, 1210 Fifth Avenue, Suite 250, San Rafael, CA, 94901, USA, 2018
Wang, Zhe and Reschke, S. and Hüvonen, D. and Do, S.-H. and Choi, K.-Y. and Gensch, M. and Nagel, U. and Rõõm, T. and Loidl, A. Magnetic Excitations and Continuum of a Possibly Field-Induced Quantum Spin Liquid in alpha-RuCl3. Phys. Rev, Lett, 119:227202, 2017
Andrea Krachmalnicoff, Richard Bounds, Salvatore Mamone, Shamim Alom, Maria Concistre, Benno Meier, Karel Kouril, Mark E. Light, Mark R. Johnson, Stephane Rols, Anthony J. Horsewill, Anna Shugai, Urmas Nagel, Toomas Rõõm, Marina Carravetta, Malcolm H. Levitt, and Richard J. Whitby. The dipolar endofullerene HF@C60. Nature Chemistry, 8(10):953–957, 2016
Kézsmárki, I.; Szaller, D.; Bordács, S. ;Kocsis, V.;Tokunaga, Y.; Taguchi, Y.; Murakawa, H.; Tokura, Y. ; Engelkamp, H.; Rõõm, T.; Nagel, U. One-way transparency of four-coloured spin-wave excitations in multiferroic materials. Nature Communications, 5, 3203, 2014
Nagel, U.; Fishman, Randy S.; Katuwal, T.; Engelkamp, H.; Talbayev, D.; Yi, Hee Taek; Cheong, S.-W.; Rõõm, T. (2013). Terahertz Spectroscopy of Spin Waves in Multiferroic BiFeO3 in High Magnetic Fields. Phys. Rev. Lett., 110:257201, 2013
Bordacs, Sandor; Kezsmarki, Istvan; Szaller, David; Demko, Laszlo; Kida, Noriaki; Murakawa, Hiroshi; Onose, Yoshinori; Shimano, Ryo; Rõõm, Toomas; Nagel, Urmas; Miyahara, Shin; Furukawa, Nobuo; Tokura, Yoshinori. Chirality of Matter Shows Up via Spin Excitations. Nature Physics, 8:734–738, 2012.
C. Beduz, M. Carravetta, J. Chen, M. Concistre, M. Denning, M. Frunzi, A. Horsewill, O. Johannessen, R. Lawler, X. Lei, M. Levitt, Y. Li, S. Mamone, Y. Murata, U. Nagel, T. Nishida, J. Ollivier, S. Rols, T. Room, R. Sarkar, N. Turro, and Y. Yang, Quantum rotation ofortho and para-water encapsulated in a fullerene cage, Proc. Natl. Acad. Sci., 109, 12894-12898,2012
K. Penc, J. Romhányi, T. Rõõm, U. Nagel, Á. Antal, T. Fehér, A. Jánossy, H. Engelkamp, H. Murakawa, Y. Tokura, D. Szaller, S. Bordács, and I. Kézsmárki. Spin-Stretching Modes in Anisotropic Magnets: Spin-Wave Excitations in the Multiferroic Ba2CoGe2O7. Phys. Rev. Lett. 108, 257203, 2012
Nagel, U.; Uleksin, T.; Rõõm, T.; Lobo, R.P.S.M.; Lejay, P.; Homes, C.C.; Hall, J.; Kinross, A.W.; Purdy, S.; Williams, T. J.; Luke, G.M.; Timusk, T. Optical spectroscopy shows that the normal state of URu2Si2 is an anomalous Fermi liquid. Proc. Natl. Acad. Sci., 109,19161–19165, 2012
Min Ge, U. Nagel, D. Hüvonen, T. Rõõm. S. Mamone, M. H. Levitt, M. Carravetta, Y. Murata, K. Komatsu, Xuegong Lei, N. J. Turro. Infrared spectroscopy of endohedral HD and D2 in C60. J. Chem. Phys., 135, 114511, 2011
Min Ge, U. Nagel, D. Hüvonen, T. Rõõm, S. Mamone, M. H. Levitt, M. Carravetta, Y. Murata, K. Komatsu, J. Y.-C. Chen, and N. J. Turro. Interaction potential and infrared absorption of endohedral H2 in C60. J. Chem. Phys. 134, 054507, 2011
D. Hüvonen, U. Nagel, T. Rõõm, Y. J. Choi, C. L. Zhang, S. Park, S.-W. Cheong. Magnetic excitations and optical transitions in the multiferroic spin-1/2 system LiCu2O2. Phys. Rev. B, 80, 100402(R) (2009)
S. Mamone, Min Ge, D. Hüvonen, U. Nagel, A. Danquigny, F. Cuda, M. C. Grossel, Y. Murata, K. Komatsu, M. H. Levitt, T. Rõõm, M. Carravetta. Rotor in a Cage: Infrared Spectroscopy of an Endohedral Hydrogen-Fullerene Complex. J. Chem. Phys., 130, 081103, 2009
J. Yang, D. Huvonen, U. Nagel, T. Room, N. Ni, P. C. Canfield, S. L. Budko, J.P. Carbotte, T. Timusk. Optical spectroscopy of superconducting Ba0.55K0.45Fe2As2: evidence for strong coupling to low energy bosons. Phys. Rev. Lett. 102, 187003 (2009)
T. Rõõm, D. Hüvonen, U. Nagel, J. Hwang, T. Timusk, H. Kageyama. Far-infrared spectroscopy of spin excitations and Dzyaloshinskii-Moriya interactions in a Shastry-Sutherland compund SrCu2(BO3)2. Phys. Rev. B, 70, 144417-8, 2004
T. Rõõm, D. Hüvonen, U. Nagel, Y.-J. Wang, R.K. Kremer. Low-energy excitations and dynamic Dzyaloshinskii-Moriya interaction in α’-NaV2O5 studied by far-infrared spectroscopy. – Phys. Rev. B, 69, 144410-19, 2004
Johan Viirok, MSc, 2015, Tallinn University of Technology. “Magnetväljaga tekitatud THz kiirguse suunadikroism multiferroidses Sr2CoSi2O7-s“, In Estonian, supervisors T.Rõõm, U.Nagel.
Laur Peedu, MSc, 2013, Tallinn University of Technology. “Vesiniku molekuli kvantliikumise infrapunaspektroskoopia endoeedrilises fullereenis H2@C70“. In Estonian, supervisors U. Nagel, T.Rõõm.
Johan Viirok, bachelor, 2013, Tallinn University of Thechnology. “Loodusliku asuriidi terahertsspektroskoopia temperatuuril alla 1K“. In Estonian, supervisors U. Nagel, T.Rõõm.
Taaniel Uleksin, MSc, 2012, Tallinn University of Technology. “Teraherts-spektroskoopia tugevates magnetväljades millikelvintemperatuuridel“, in Estonian, supervisors U. Nagel, T. Rõõm
Laur Peedu, bachelor, 2011, Tallinn University of Technology. “Grafeeni optilised omadused kauge infrapuna piirkonnas“, in Estonian, supervisors U. Nagel, T. Rõõm
Taaniel Uleksin, bachelor, 2010, Tallinn University of Technology. “Peegelduse temperatuurisõltuvuse mõõtmine ja optiliste konstantide määramine Cu2ZnSn(SexS1-x)4-s“, in Estonian, supervisors U. Nagel, T. Rõõm and prof. J. Krustok
Dan Hüvonen, PhD, 2008, Tallinn University of Technology. “Terahertz Spectroscopy of Low-Dimensional Spin Systems“, supervisors U. Nagel, T. Rõõm and prof. J. Krustok. Opponents Dr. Sergei Zvyagin, Hochfeld-Magnetlabor Dresden and Dr. Ilmo Sildos, Institute of Physics, Tartu University
