Enhancement of the superconducting critical temperature in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ by controlling disorder outside CuO${}_2$ planes

Abstract

We investigate the effect of disorder at various lattice sites outside the CuO${}_2$ plane on the superconducting critical temperature $T_c$ of the cuprate superconductor Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ (Bi2212). The most effective disorder turns out to be that at the Sr site in the neighboring blocks, which contain apical-oxygen atoms. The Sr-site disorder reduces $T_c$ and also produces a residual component (${\rho }_0$) in the in-plane resistivity, the magnitude of which is found to be proportional to the magnitude of $T_c$ reduction. We demonstrate that both $T_c$-degradation rate and ${\rho }_0$ decrease as the number of the CuO${}_2$ planes increases in the unit cell, that is, as the number of the neighboring SrO blocks decreases. In real crystals of Bi-based cuprates, main source of disorder is Bi atoms randomly occupying the Sr sites. We have succeeded in reducing the Bi content at Sr-sites as much as possible and achieved $T_c$=98K, a high-$T_c$ record in Bi2212.

arXiv comment7 pages, 1 table, 5 figures

References in corpus (8)

• Band-structure trend in hole-doped cuprates and correlation with Tcmax
• Effect of chemical inhomogeneity in the bismuth-based copper oxide superconductors
• Effect of disorder outside the CuO${}_2$ planes on $T_c$ of copper oxide superconductors
• Imaging the impact on cuprate superconductivity of varying the inter-atomic distances within individual crystal unit-cells
• Enhancement of the superconducting critical temperature of Sr2CuO3+d up to 95K by ordering dopant atoms
• Enhancement of electronic inhomogeneities due to out-of-plane disorder in Bi_2Sr_2CuO_{6+delta} superconductors observed by scanning tunneling spectroscopy
• Structure of BSCCO supermodulation from ab initio calculations
• Superconducting gap variations induced by structural supermodulation in BSCCO

Cited by in corpus (20)

• Spectroscopic Imaging STM Studies of Electronic Structure in the Superconducting and Pseudogap Phases of Cuprate High-Tc Superconductors
• Relationship between the parent charge transfer gap and maximum transition temperature in cuprates
• Spin-stripe density varies linearly with hole content in single-layer Bi2201 cuprate
• Lattice effects on ferromagnetism in perovskite ruthenates
• $Ab$ $initio$ low-energy effective Hamiltonians for high-temperature superconducting cuprates Bi${}_2$Sr${}_2$CuO${}_6$, Bi${}_2$Sr${}_2$CaCu${}_2$O${}_8$, HgBa${}_2$CuO${}_4$ and CaCuO${}_2$
• Charge-screening role of $c$-axis atomic displacements in YBa${}_2$Cu${}_3$O${}_{6+x}$ and related superconductors
• Through a Lattice Darkly -- Shedding Light on Electron-Phonon Coupling in the High T${}_c$ Cuprates
• RE L${}_3$ X-ray absorption study of REO${}_{1-x}$F${}_x$FeAs (RE=La, Pr, Nd, Sm) oxypnictides
• Superconductivity studied by solving ab initio low-energy effective Hamiltonians for carrier doped CaCuO${}_2$, Bi${}_2$Sr${}_2$CuO${}_6$, Bi${}_2$Sr${}_2$CaCu${}_2$O${}_8$, and HgBa${}_2$CuO${}_4$
• Doping Dependencies of Onset Temperatures for the Pseudogap and Superconductive Fluctuation in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$, Studied from both In-Plane and Out-of-Plane Magnetoresistance Measurements
• Electronic structure of the ingredient planes of cuprate superconductor Bi2Sr2CuO6+δ: a comparison study with Bi2Sr2CaCu2O8+δ
• Absence of $\mu$SR evidence for magnetic order in the pseudogap phase of Bi${}_{2+x}$Sr${}_{2-x}$CaCu${}_2$O${}_{8+\delta }$
• Guided design of copper oxysulfide superconductors
• Strong enhancement of d-wave superconducting state in the three-band Hubbard model coupled to an apical oxygen phonon
• Disorder-dependent superconducting pairing symmetry in doped graphene
• Simple predictors of $T_c$ in superconducting cuprates and the role of interactions between effective Wannier orbitals in the $d-p$ 3-band model
• The role of the nominal iron content in the structural, compositional and physical properties of BaFe${}_{2+\delta }$S${}_3$
• Disorder Effects on Competition between Antiferromagnetism and Superconductivity in Cuprate Superconductors through the Enhancement in Charge Susceptibility
• Signature of T${}_{\text{c}}$ above 111 K in Li-doped (Bi,Pb)-2223 superconductors: synergistic nature of hole concentration, coherence length and Josephson interlayer coupling
• Ubiquitous antinodal quasiparticles and deviation from simple d-wave form in underdoped Bi-2212