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Low-temperature hydrogen absorption into V and Nb metals from liquid hydrogen

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, , Citation H Takata et al 2018 J. Phys.: Conf. Ser. 969 012008 DOI 10.1088/1742-6596/969/1/012008

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takata.h.919@s.kyushu-u.ac.jp

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1 Department of Applied Quantum Physics, Kyushu University, Fukuoka 819-0395, Japan

2 Department of physics, Tokyo Institute of Technology School of Science, Tokyo 152-8551, Japan

3 Department of Education, Kanazawa University, Kanazawa 920-1192, Japan

4 Department of Engineering Science, Kyushu University, Fukuoka 816-8580, Japan

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1742-6596/969/1/012008

Abstract

We report experimental study on low-temperature hydrogen (H) absorption in vanadium (V) and niobium (Nb) nanocontacts below T = 20 K using a point-contact spectroscopy (PCS) technique. When a small bias voltage is applied between both sides of nanocontacts immersed in liquid H2, the differential conductance (dI/dV) and the second derivative (d2I/dV2) are changed from those for pure V and Nb nanocontacts. Further, the spectra approach to those for a high concentrated phase of H with increasing the bias voltage. The results indicate that in-situ investigation of H absorption process from liquid H2 is possible through dI/dV and d2I/dV2 measurements using the PCS technique.

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10.1088/1742-6596/969/1/012008