Temperature dependence of low-energy phonons in magnetic nonsuperconducting TbNi${}_{2}$B${}_{2}$C

Temperature dependence of low-energy phonons in magnetic nonsuperconducting TbNi $_{2}$ B $_{2}$ C

S. Anissimova, A. Kreyssig, O. Stockert, M. Loewenhaupt, and D. Reznik

Phys. Rev. B 84, 104509 – Published 9 September 2011

Abstract

We report temperature dependence of low-energy phonons in magnetic nonsuperconducting TbNi $_{2}$ B $_{2}$ C single crystals measured by inelastic neutron scattering. We observed low-temperature softening and broadening of two phonon branches, qualitatively similar to that previously reported for superconducting $R$ Ni $_{2}$ B $_{2}$ C $(R = rare$ earth, $Y$ ) compounds. This result suggests that superconductivity in TbNi $_{2}$ B $_{2}$ C compounds is absent not because of weak electron-phonon coupling but as a result of pair breaking due to magnetism.

Received 19 May 2011

DOI:https://doi.org/10.1103/PhysRevB.84.104509

Authors & Affiliations

S. Anissimova¹, A. Kreyssig^2,6, O. Stockert⁴, M. Loewenhaupt², and D. Reznik^1,3,5

¹Department of Physics, University of Colorado at Boulder, Boulder, Colorado 80309, USA
²Technische Universität Dresden, Institut für Festkörperphysik, D-01062 Dresden, Germany
³CEA Saclay, Laboratoire Léon Brillouin, F-91191 Gif sur Yvette, France
⁴Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, D-01187 Dresden, Germany
⁵Karlsruher Institut für Technologie (KIT), Institute für Festkörperphysik, Postfach 3640, D-76121 Karlsruhe, Germany
⁶Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA

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Vol. 84, Iss. 10 — 1 September 2011

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