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Disorder effects in pnictides : a tunneling spectroscopy study

Autor: Noat, Y., Cren, T., Dubost, V., Lange, S., Debontridder, F., Marcus, J., Toulemonde, P., Sacks, W., Roditchev, D.

We present the synthesis and the tunneling spectroscopy study of superconducting FeSe0.5Te0.5 (Tc = 14 K), SmFeAsO0.85 (Tc = 45 K) and SmFeAsO0.9F0.1 (Tc = 52 K). The samples were characterized by Rietveld refinement of X-ray diffraction patterns and

Externí odkaz: http://arxiv.org/abs/1007.3151

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Electric Pulse Induced Resistive Switching, Electronic Phase Separation, and Possible Superconductivity in a Mott insulator

Autor: Vaju, C., Cario, L., Corraze, B., Janod, E., Dubost, V., Cren, T., Roditchev, D., Braithwaite, D., Chauvet, O.

Publikováno v: Advanced Materials 20, 2760-2765 (2008)

Metal-insulator transitions (MIT) belong to a class of fascinating physical phenomena, which includes superconductivity, and colossal magnetoresistance (CMR), that are associated with drastic modifications of electrical resistance. In transition meta

Externí odkaz: http://arxiv.org/abs/0909.1978

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Scanning Tunneling Spectroscopy on the novel superconductor CaC6

Autor: Bergeal, N., Dubost, V., Noat, Y., Sacks, W., Roditchev, D., Emery, N., Herold, C., Mareche, J-F., Lagrange, P., Loupias, G.

We present scanning tunneling microscopy and spectroscopy of the newly discovered superconductor CaC$_6$. The tunneling conductance spectra, measured between 3 K and 15 K, show a clear superconducting gap in the quasiparticle density of states. The g

Externí odkaz: http://arxiv.org/abs/cond-mat/0604208

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