科研之友
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摘要
YbRh2Si2 is a clean heavy fermion system which displays a magnetic field tuned quantum critical point. We present low-temperature electrical resistivity, magnetostriction and magnetization measurements on high-quality single crystals with a residual resistivity ratio of 150. The data provide evidence for a low-energy scale T* (H) which vanishes in addition to the boundaries of the magnetic ordering and Landau Fermi liquid regime at the quantum critical point, indicating unconventional quantum criticality.
- 出版日期2008-4-1
