Universal Properties of Cuprate Superconductors: T-c Phase Diagram, Room-Temperature Thermopower, Neutron Spin Resonance, and STM Incommensurability Explained in Terms of Chiral Plaquette Pairing

作者：Tahir Kheli Jamil^*; Goddard William A III

来源：Journal of Physical Chemistry Letters, 2010, 1(8): 1290-1295.

DOI：10.1021/jz100265k

We report that four properties of cuprates and their evolution With doping are consequences of simply counting four-site plaquettes arising froth doping, (1) the universal T-c phase diagram (superconductivity between similar to 0.05 and similar to 0.27 doping per CuO2 plane and optimal T-c at similar to 0.16), (2) the universal doping dependence of the room-temperature thermopower, (3) the superconducting neutron spin resonance peak (the "41 meV peak"), and (4) the dispersionless scanning tunneling conductance incommensurability. Properties (1), (3), and (4) are explained with-no adjustable parameters, and (2) is explained with exactly one. The successful quantitative interpretation of four very distinct aspects of cuprate phenomenology by a simple counting rule provides strong evidence for four-site plaquette percolation in these materials. This suggests that inhomogeneity, percolation, and plaquettes play an essential role in cuprates. This geometric analysis may provide a useful guide to search for new compositions and structures with improved superconducting properties.

• 出版日期2010-4-15