x_opt and x_c in Cuprate Superconductors

27 Sep 2019 Röhler Jürgen

The characteristic hole concentrations x_opt = 0.16 and x_c = 0.19 in the under- to overdoped transition regime of cuprate superconductors are shown to be intimately interrelated by mesoscale organization of bond-like RVB arrays extending over 3 x 4 copper sites and comprising 2 holes spaced by 3a_0. Columnar organization maximizes T_c but reduces the superfluid stiffness, while zigzag (tweedy) organization maximizes the superfluid stiffness at reduced T_c... (read more)

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  • SUPERCONDUCTIVITY
  • STRONGLY CORRELATED ELECTRONS