Superconductivity proximate to antiferromagnetism in a copper-oxide monolayer grown on Bi2Sr2CaCu2O8+δ
Shuai Wang, Long Zhang, Fa Wang
DOI 10.1103/PhysRevB.97.035112 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
A nodeless superconducting (SC) gap was reported in a recent scanning tunneling spectroscopy experiment of a copper-oxide monolayer grown on a Bi2Sr2CaCu2O8+δ (Bi2212) substrate [Zhong et al., Sci. Bull. 61, 1239 (2016)], which is in stark contrast to the nodal d-wave pairing gap in the bulk cuprates. Motivated by this experiment, we first show with first-principles calculations that the tetragonal CuO (T-CuO) monolayer on the Bi2212 substrate is more stable than the commonly postulated CuO2 structure. The T-CuO monolayer is composed of two CuO2 layers sharing the same O atoms. The band structure is obtained by first-principles calculations, and its strong electron correlation is treated with the renormalized mean-field theory. We argue that one CuO2 sublattice is hole doped while the other sublattice remains half filled and may have antiferromagnetic (AF) order. The doped Cu sublattice can show d-wave SC; however, its proximity to the AF Cu sublattice induces a spin-dependent hopping, which splits the Fermi surface and may lead to a full SC gap. Therefore, the nodeless SC gap observed in the experiment could be accounted for by the d-wave SC proximity to an AF order, thus it is extrinsic rather than intrinsic to the CuO2 layers.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| CuO Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Surface pinning and grain boundary formation in magnetic flux-line lattices of Bi2Sr2CaCu2O8+δ high-Tc superconductors
similarity 0.97Hongjie Dai et al.
Source status unknown — claims are unverified
Structural origin of misorientation-independent superconducting behavior at [001] twist boundaries in Bi2Sr2CaCu2O8+δ
similarity 0.96Yimei Zhu et al.
Source status unknown — claims are unverified
Superconductivity and structure of a few-unit-cells-thick Bi-Sr-Ca-Cu-O ultrathin films
similarity 0.96Kazuo Saito & Masatsugu Kaise
Source status unknown — claims are unverified
Superconductivity proximate to antiferromagnetism in a copper-oxide monolayer grown on BiSrCaCuO
similarity 0.96Shuai Wang et al. · 2017 · arXiv:1707.06346
Source status unknown — claims are unverified
Oxygen hole symmetry and banding in cuprate superconductors
similarity 0.96L. F. Mattheiss & D. R. Hamann
Source status unknown — claims are unverified
Signatures of pressure-induced superconductivity in insulating Bi1.98Sr2.06Y0.68CaCu2O8+δ
similarity 0.96T. Cuk et al.
Source status unknown — claims are unverified