U
Urmas Nagel
Researcher at National Institute of Chemical Physics and Biophysics
Publications - 101
Citations - 2438
Urmas Nagel is an academic researcher from National Institute of Chemical Physics and Biophysics. The author has contributed to research in topics: Dark matter & Magnetic field. The author has an hindex of 24, co-authored 90 publications receiving 2023 citations. Previous affiliations of Urmas Nagel include Max Planck Society & Technische Universität München.
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Journal ArticleDOI
Limits on WIMP dark matter using sapphire cryogenic detectors
G. Angloher,M. Bruckmayer,C. Bucci,M Bühler,Susan Cooper,C. Cozzini,P. DiStefano,F. von Feilitzsch,T. Frank,D. Hauff,Th. Jagemann,J. Jochum,V. Jörgens,R. Keeling,H. Kraus,M. Loidl,J. Marchese,O. Meier,Urmas Nagel,F. Pröbst,Y. Ramachers,A. Rulofs,J. Schnagl,W. Seidel,I. Sergeyev,Monica Sisti,M. Stark,Sergey Uchaikin,Leo Stodolsky,H. R. T. Wulandari,L. Zerle +30 more
TL;DR: In this paper, data taken by CRESST with a cryogenic detector system based on 262 g sapphire crystals has been used to place limits on WIMP dark matter in the Galactic Halo.
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Magnetic Excitations and Continuum of a Possibly Field-Induced Quantum Spin Liquid in α-RuCl_{3}.
Zhe Wang,S. Reschke,D. Hüvonen,Seung-Hwan Do,K.-Y. Choi,Michael Gensch,Urmas Nagel,Toomas Rõõm,Alois Loidl +8 more
TL;DR: Terahertz spectroscopy of quantum spin dynamics in α-RuCl_{3], a system proximate to the Kitaev honeycomb model, as a function of temperature and magnetic field is reported, characterizing the dynamical properties of a possibly field-induced quantum spin liquid.
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The dipolar endofullerene HF@C60
Andrea Krachmalnicoff,Richard Bounds,Salvatore Mamone,Shamim Alom,Maria Concistrè,Benno Meier,Karel Kouřil,Mark E. Light,Mark R. Johnson,Stéphane Rols,Anthony J. Horsewill,A. Shugai,Urmas Nagel,Toomas Rõõm,Marina Carravetta,Malcolm H. Levitt,Richard J. Whitby +16 more
TL;DR: The encapsulation of hydrogen fluoride inside C60 is reported using molecular surgery to give the endohedral fullerene HF@C60, which exhibits quantization of its translational and rotational degrees of freedom, as revealed by inelastic neutron scattering and infrared spectroscopy.
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Quantum rotation of ortho and para-water encapsulated in a fullerene cage
C. Beduz,Marina Carravetta,Judy Y.-C. Chen,Maria Concistrè,Mark Denning,Michael Frunzi,Anthony J. Horsewill,Ole G. Johannessen,Ronald G. Lawler,Xuegong Lei,Malcolm H. Levitt,Yongjun Li,Salvatore Mamone,Yasujiro Murata,Urmas Nagel,Tomoko Nishida,Jacques Ollivier,Stéphane Rols,Toomas Rõõm,Riddhiman Sarkar,Nicholas J. Turro,Yifeng Yang +21 more
TL;DR: Investigation of the quantized rotation and ortho–para conversion of single water molecules trapped inside closed fullerene cages reveals that the ground state of encapsulated ortho water has a lifted degeneracy, associated with symmetry-breaking of the water environment.
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Chirality of matter shows up via spin excitations
Sándor Bordács,Sándor Bordács,István Kézsmárki,István Kézsmárki,D. Szaller,László Demkó,László Demkó,Noriaki Kida,H. Murakawa,Yoshinori Onose,Ryo Shimano,Toomas Rõõm,Urmas Nagel,Shin Miyahara,Nobuo Furukawa,Nobuo Furukawa,Yoshinori Tokura +16 more
TL;DR: In this article, the chiral spin structure of an antiferromagnet has been found to have a similar response to left-and right-circularly polarized light, which is the result of the specific distribution of charge within chiral materials.