Subject: Physics Colloquium - PSB 161, Fri., Aug. 30, 2013, 4:30
Yoshiharu Krockenberger
NTT Basic Research Laboratories
Hole-like Fermi surfaces in electron-doped cuprates
The
phase diagram of high-temperature superconductors, e.g.,cuprate superconductors, has been
scrutinized for symmetry with respect
to doping. While large efforts have been taken to shed light on
the so-called hole-doped side of the phase diagram, the electron-doped side has been investigated with much less rigidity. In particular, while superconductivity is induced solely by chemical doping in hole-doped cuprates, doping alone is insufficient to induce superconductivity in electron doped cuprates. Besides, an additional annealing procedure is inevitable for the induction of superconductivity in those cuprates. Moreover, while the copper ion is five- and/or six-fold coordinated in hole-doped cuprates, it is square-planar for electron doped cuprates. Here we show that superconductivity in electron-doped cuprates can be induced even in the absence of chemical doping. This allows us to see the phase diagram of high-temperature superconducting cuprates under some new light.
the so-called hole-doped side of the phase diagram, the electron-doped side has been investigated with much less rigidity. In particular, while superconductivity is induced solely by chemical doping in hole-doped cuprates, doping alone is insufficient to induce superconductivity in electron doped cuprates. Besides, an additional annealing procedure is inevitable for the induction of superconductivity in those cuprates. Moreover, while the copper ion is five- and/or six-fold coordinated in hole-doped cuprates, it is square-planar for electron doped cuprates. Here we show that superconductivity in electron-doped cuprates can be induced even in the absence of chemical doping. This allows us to see the phase diagram of high-temperature superconducting cuprates under some new light.
PSB 161
Fri., Aug. 30, 2013
4:30
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