Intrinsic electronic superconducting phases at 60 K and 90 K in double-layer YBa$_2$Cu$_3$O$_{6+δ}$

T. Honma; P. H. Hor

doi:10.1103/PhysRevB.75.012508

paper

Intrinsic electronic superconducting phases at 60 K and 90 K in double-layer YBa $_{2}$ Cu $_{3}$ O $_{6 + δ}$

arXiv:cond-mat/0611348 · doi:10.1103/PhysRevB.75.012508

Abstract

We study superconducting transition temperature ( $T_{c}$ ) of oxygen-doped double-layer high-temperature superconductors YBa $_{2}$ Cu $_{3}$ O $_{6 + δ}$ (0 $\leq$ $δ$ $\leq$ 1) as a function of the oxygen dopant concentration ( $δ$ ) and planar hole-doping concentration ( $P_{pl}$ ). We find that $T_{c}$ , while clearly influenced by the development of the chain ordering as seen in the $T_{c}$ $v s .$ $δ$ plot, lies on a universal curve originating at the critical hole concentration ( $P_{c}$ ) = 1/16 in the $T_{c}$ $v s .$ $P_{pl}$ plot. Our analysis suggests that the universal behavior of $T_{c}$ ( $P_{pl}$ ) can be understood in terms of the competition and collaboration of chemical-phases and electronic-phases that exist in the system. We conclude that the global superconductivity behavior of YBa $_{2}$ Cu $_{3}$ O $_{6 + δ}$ as a function of doping is electronically driven and dictated by pristine electronic phases at magic doping numbers that follow the hierarchical order based on $P_{c}$ , such as 2 $\times$ $P_{c}$ , 3 $\times$ $P_{c}$ and 4 $\times$ $P_{c}$ . We find that there are at least two intrinsic electronic superconducting phases of $T_{c}$ = 60 K at 2 $\times$ $P_{c}$ = 1/8 and $T_{c}$ = 90 K at 3 $\times$ $P_{c}$ = 3/16.

arXiv comment4 pages, 2 figures

Intrinsic electronic superconducting phases at 60 K and 90 K in double-layer YBa $_{2}$ Cu $_{3}$ O $_{6 + δ}$

Abstract

References in corpus (11)

Cited by in corpus (15)

Intrinsic electronic superconducting phases at 60 K and 90 K in double-layer YBa2​Cu3​O6+δ​

Abstract

References in corpus (11)

Cited by in corpus (15)

Intrinsic electronic superconducting phases at 60 K and 90 K in double-layer YBa $_{2}$ Cu $_{3}$ O $_{6 + δ}$