Crystallization characteristics of Ge-Sb phase change materials
Simone Raoux, Cyril Cabrai Jr., et al.
MRS Spring Meeting 2009
In high-transition-temperature (Tc) superconductivity, charge doping is a natural tuning parameter that takes copper oxides from the antiferromagnet to the superconducting region. In the metallic state above Tc, the standard Landau's Fermi-liquid theory of metals as typified by the temperature squared (T2) dependence of resistivity appears to break down. Whether the origin of the non-Fermiliquid behavior is related to physics specific to the cuprates is a fundamental question still under debate. We uncover a transformation from the non-Fermi-liquid state to a standard Fermi-liquid state driven not by doping but by magnetic field in the overdoped high-Tc superconductor Tl2Ba2CuO6+x. From the c-axis resistivity measured up to 45 T, we show that the Fermi-liquid features appear above a sufficiently high field that decreases linearly with temperature and lands at a quantum critical point near the superconductivity's upper critical field - with the Fermi-liquid coefficient of the T2 dependence showing a power-law diverging behavior on the approach to the critical point. This field-induced quantum criticality bears a striking resemblance to that in quasi-two-dimensional heavy-Fermion superconductors, suggesting a common underlying spin-related physics in these superconductors with strong electron correlations. © 2008 by The National Academy of Sciences of the USA.
Simone Raoux, Cyril Cabrai Jr., et al.
MRS Spring Meeting 2009
Tsuyoshi Kawakami, Takasada Shibauchi, et al.
Physical Review Letters
Kuan-Neng Chen, Lia Krusin-Elbaum
Nanotechnology
Tsuyoshi Tamegai, Kamran Behnia, et al.
Physica B: Condensed Matter