Enhancement of the superconducting critical temperature of Sr2CuO3+d up to 95K by ordering dopant atoms

Details Enhancement of the superconducting critical temperature of Sr2CuO3+d up to 95K by ordering dopant atoms Enhancement of the superconducting critical temperature of Sr2CuO3+d up to 95K by ordering dopant atoms

2006-11-16

arxiv.org/abs/cond-mat/0611439v1

Phys. Rev.B 74, 100506(Rapid Com.)(2006)

Physics

Condensed Matter

Superconductivity

18 pages, 5 Figures

Scientific paper

10.1103/PhysRevB.74.100506

We address the question of whether the superconducting transition temperature (Tc) of high-Tc cuprates is enhanced when randomly distributed dopant atoms form an ordered array in the charge reservoir layers. This study is possible for the Sr2CuO3+d superconductor with K2NiF4-type structure in which oxygen atoms only partially occupy the apical sites next to the CuO2 planes and act as hole-dopants. We show that remarkable Tc enhancement up to 95K in this mono CuO2 layered HTS is associated with the apical oxygen ordering, not to the hole concentration change. The result points a route toward further enhancement of Tc in cuprate superconductors.

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