Superconductivity and quantum criticality in the heavy-fermion system β-YbAlB4
نویسندگان
چکیده
منابع مشابه
Heavy fermion quantum criticality.
During the last few years, investigations of rare-earth materials have made clear that heavy fermion quantum criticality exhibits novel physics not fully understood. In this work, we write for the first time the effective action describing the low energy physics of the system. The f fermions are replaced by a dynamical scalar field whose nonzero expected value corresponds to the heavy fermion p...
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β-YbAlB4 is the first Yb-based heavy fermion superconductor with Tc = 80 mK. We measured low temperature magnetization of high-purity single crystals down to T = 25 mK. The measurements have revealed a considerable amount of volume fractions of the superconductivity and the upper critical field Bc2 curve under field along the c axis, consistent with the previous results. In the normal state, th...
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ژورنال
عنوان ژورنال: Nature Physics
سال: 2008
ISSN: 1745-2473,1745-2481
DOI: 10.1038/nphys1002