4,174 research outputs found
Two-gap and paramagnetic pair-breaking effects on upper critical field of SmFeAsO and SmFeAsOF single crystals
We investigated the temperature dependence of the upper critical field
[] of fluorine-free SmFeAsO and fluorine-doped
SmFeAsOF single crystals by measuring the resistive transition
in low static magnetic fields and in pulsed fields up to 60 T. Both crystals
show that 's along the c axis [] and in an -planar
direction [] exhibit a linear and a sublinear increase,
respectively, with decreasing temperature below the superconducting transition.
's in both directions deviate from the conventional one-gap
Werthamer-Helfand-Hohenberg theoretical prediction at low temperatures. A
two-gap nature and the paramagnetic pair-breaking effect are shown to be
responsible for the temperature-dependent behavior of and
, respectively.Comment: 21 pages, 8 figure
A mechanism for robust circadian timekeeping via stoichiometric balance
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/102189/1/msb201262.reviewer_comments.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/102189/2/msb201262.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/102189/3/msb201262-sup-0001.pd
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