UNIGE document Scientific Article
previous document  unige:35764  next document
add to browser collection
Title

Unconventional superconductivity and non-Fermi liquid behaviour of ɛ-iron at high pressure

Authors
Behr, G.
Inada, Y.
Onuki, Y.
Published in Journal of Physics. Condensed Matter. 2004, vol. 16, no. 14, p. S1121-S1127
Abstract We report further resistivemeasurements under pressure of samples of iron from multiple sources. The normal state resistivity of ε-iron varied as ρ0 + AT5/3 at low temperature over the entire superconducting pressure domain. The superconductivity could be destroyed by mechanical work, and was restored by annealing, demonstrating sensitivity to the residual resistivity ρ0. Thereis a strong correlation between the ρ0 and A coefficients and the superconducting critical temperature Tc. Thecritical field Bc2 corresponding to the maximum Tc was found to be 0.73T, implying a coherence length of about 20 nm, i.e. slightly shorter than the electronicmean free path. Within the partial resistive transition there was a significant current dependence, with V (I ) = a(I − I0) + bI2, and a _ b, possibly indicating flux-flow resistivity, even in the absence of an externally applied magnetic field.
Identifiers
Full text
Structures
Research group Groupe Triscone
Citation
(ISO format)
HOLMES, Alexander et al. Unconventional superconductivity and non-Fermi liquid behaviour of ɛ-iron at high pressure. In: Journal of Physics. Condensed Matter, 2004, vol. 16, n° 14, p. S1121-S1127. https://archive-ouverte.unige.ch/unige:35764

181 hits

0 download

Update

Deposited on : 2014-04-15

Export document
Format :
Citation style :