J. Phys. Soc. Jpn. 79 (2010) 094706 (4 pages)  |Previous Article| |Next Article|  |Table of Contents|
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Temperature Dependence of Energy Gap in the Superconducting State in URu₂Si₂

Frederic Bourdarot, Elena Hassinger, Stephane Raymond, Dai Aoki, Valentin Taufour, and Jacques Flouquet

(Received May 7, 2010; Accepted July 6, 2010; Published August 25, 2010)

The excitation spectrum of URu₂Si₂ in the superconducting state has been investigated by a precise neutron-scattering experiment. A weak but clear positive energy shift of ∼40 µeV has been detected in the superconducting phase (at T=400 mK) for the resonance at Q₀ = (1,0,0). For the resonance at Q₁ = (0.6,0,0), a two times smaller shift is observed but with an incertitude of the same order than this shift. This result is in agreement with our previous results indicating that the wave-vector Q₀ is connected with the order parameters of the hidden order and of superconductivity. ©2010 The Physical Society of Japan

URL: http://jpsj.ipap.jp/link?JPSJ/79/094706/
DOI: 10.1143/JPSJ.79.094706

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