| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1818500 | Physica C: Superconductivity and its Applications | 2011 | 7 Pages |
Understanding the normal state transport properties in hole-doped high-temperature cuprate superconductors (HTCSs) is a challenging task which has been widely believed to be one of the key steps toward revealing the pairing mechanism of high-temperature superconductivity. Here, we present a true intrinsic and universal doping dependence of in-plane dc conductivity for all underdoped HTCSs. The doping dependence of in-plane dc conductivity normalized to that at optimal doping can be represented by a simple exponential formula. The doping behavior of the square of the nodal Fermi velocity derived by the high-resolution laser-based angle-resolved photoemission spectroscopy in the superconducting state follows reasonably well the universal intrinsic doping behavior. Our findings suggest a commonality of the low-energy quasiparticles both in the normal and superconducting states that place a true universal and stringent constraint on the mechanism of high-temperature superconductivity for HTCSs.
► We have analyzed the in-plane dc conductivity data collected from cuprate superconductors based our universal hole-scale. ► We reveal a true intrinsic and universal doping dependence of in-plane dc conductivity in the underdoped side. ► This behavior is consistent with the nodal Fermi velocity measured by laser ARPES. ► Our findings unify the doping dependence of the normal and superconducting states.
