On the quantitative determination of hole-concentration in high-temperature cuprate superconductors

T. Honma; P. H. Hor

doi:10.1142/S0217979215420291

paper

On the quantitative determination of hole-concentration in high-temperature cuprate superconductors

arXiv:1503.00078 · doi:10.1142/S0217979215420291

Abstract

We compared four hole-scales that have been used to determine the hole-concentration in high-temperature cuprate superconductors. We show that the hole-scale, $P_{pl}$ -scale, based on the thermoelectric power [T. Honma $e t$ $a l$ ., Phys. Rev. B70, (2004) 214517.] is quantitatively consistent with spectroscopic probes for many different cuprate materials, while the other hole-scales, based on a well-known dome-shaped $T_{c}$ -curve [M. R. Presland $e t$ $a l$ ., Physica C176, 95 (1991)], the $c$ -axis lattice parameter [R. Liang $e t$ $a l$ ., Phys. Rev. B73, (2006) 180505(R).], and Hall coefficient [Y. Ando $e t$ $a l$ ., Phys. Rev. B61, (2000) 14956(R).], are not. We show that the quantitatively different hole-scales resulted in opposite conclusion of the same experimental observations. It can also lead to different interpretations of the electronic phase diagram when comparing different physical properties in different high- $T_{c}$ systems. We suggest that the $P_{pl}$ -scale is the correct universal scale that works for all high- $T_{c}$ cuprates and it should be used for all quantitative doping dependence studies of cuprates.

10 pages, 5 figures, for the proceedings of the NEW3-SC10

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