Temperature dependence of low-energy phonons in magnetic nonsuperconducting TbNi2B2C

Details Temperature dependence of low-energy phonons in magnetic nonsuperconducting TbNi2B2C Temperature dependence of low-energy phonons in magnetic nonsuperconducting TbNi2B2C

2011-05-19

arxiv.org/abs/1105.3966v2

Phys. Rev. B 84, 104509 (2011)

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1103/PhysRevB.84.104509

We report temperature dependence of low-energy phonons in magnetic nonsuperconducting TbNi2B2C single crystals measured by inelastic neutron scattering. We observed a low-temperature softening and broadening of two phonon branches, qualitatively similar to that previously reported for superconducting RNi2B2C (R= rare earth, Y) compounds. This result suggests that the superconductivity in TbNi2B2C compounds is absent not because of a weak electron-phonon coupling but as a result of pairbreaking due to magnetism.

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