THz rühma olulisemad tööd

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

PhD, magistri- ja bakalaureusetööd

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