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25 April 2024

» arxiv » cond-mat/0103060

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Penetration Depth Measurements in MgB_2: Evidence for Unconventional Superconductivity
C. Panagopoulos ; B.D. Rainford ; T. Xiang ; C.A. Scott ; M. Kambara ; I.H. Inoue ;
Date:	2 Mar 2001
Journal:	Physical Review B vol 64, 094514 (2001)
Subject:	Superconductivity; Strongly Correlated Electrons \| cond-mat.supr-con cond-mat.str-el
Abstract:	We have measured the magnetic penetration depth of the recently discovered binary superconductor MgB_2 using muon spin rotation and low field $ac$-susceptibility. From the damping of the muon precession signal we find the penetration depth at zero temperature is about 85nm. The low temperature penetration depth shows a quadratic temperature dependence, indicating the presence of nodes in the superconducting energy gap.
Source:	arXiv, cond-mat/0103060
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