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Low-Temperature Susceptibility of the Noncentrosymmetric Superconductor CePt3Si D. P. Young, M. Moldovan, X. S. Wu, and P. W. Adams
 

Summary: Low-Temperature Susceptibility of the Noncentrosymmetric Superconductor CePt3Si
D. P. Young, M. Moldovan, X. S. Wu, and P. W. Adams
Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana, 70803, USA
Julia Y. Chan
Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana, 70803, USA
(Received 8 July 2004; revised manuscript received 22 November 2004; published 15 March 2005)
We report ac susceptibility measurements of polycrystalline CePt3Si down to 60 mK and in applied
fields up to 9 T. In a zero applied field, a full Meissner state emerges at temperatures T=Tc < 0:3, where
Tc 0:65 K is the onset transition temperature. Though transport measurements show a relatively high
upper critical field Bc2 45 T, the low-temperature susceptibility 0 is quite fragile to the applied field,
with 0 diminishing rapidly in fields of a few kG. Interestingly, the field dependence of 0 is well
described by the power law 40
1 B=Bc1=2
, where Bc is the field at which the onset of resistance
is observed in transport measurements.
DOI: 10.1103/PhysRevLett.94.107001 PACS numbers: 74.70.Tx, 74.25.Ha, 74.62.Bf
Two separate but related considerations are paramount
in the search for superconductors with extraordinary elec-
tronic properties. The first is the role of crystal structure in
determining the order parameter symmetry and the second

  

Source: Adams, Philip W. - Department of Physics and Astronomy, Louisiana State University

 

Collections: Materials Science