Superconductivity proximate to antiferromagnetism in a copper-oxide monolayer grown on Bi2Sr2CaCu2O8+δ

Formation of CuO$_2$ sublattices by suppression of interlattice correlations in tetragonal CuO

“…Recently, copper-oxide films have been grown on Bi 2 Sr 2 CaCu 2 O 8+δ (BSCO), which resulted in nodeless pairing in the superconducting state [54]. Whereas the monolayer was most likely of CuO 2 structure, the possibility of CuO could not be ruled out and is supported by ab initio calculations [55]. Several layers of t-CuO grown on top of a cuprate substrate would raise the question on the node-structure of the superconducting phase again and might even allow to tune the symmetry of the SC state as a function of the number of CuO layers.…”

Atomic-scale preparation and characterization ofhigh-temperature superconducting thin films

“…受单层FeSe/SrTiO 3 界面高温超导电性发现的启 示 [38] , 利用异质结设计和构筑界面超导体的步伐再未 停止. 研究者先后通过在拓扑绝缘体Bi 2 Te 3 衬底上制 备反铁磁的FeTe薄膜 [89] 、半导体GaN(0001)衬底上制 备双层Ga薄膜 [90] 、Bi/Ni双层薄膜 [91] 以及在PbTe/Bi 2 -Te 3 /Si(111) [92] 衬底上制备的锡烯薄膜中均发现了界面 的配对对称性和物理机制仍处于争议中 [98][99][100][101] , 但我们 相信类似于单层FeSe/SrTiO 3 界面超导体 [38,55,60,61] , 界面 处电荷转移是单层CuO 2 /Bi-2212薄膜高温超导电性发…”

Superconducting dome with $extended$ $s$-$wave$ pairing symmetry in the heavily hole-overdoped copper-oxide planes

“…The main task within the DE-GWF calculation scheme is to derive a relatively compact analytical expression for the system energy expectation value in the variational correlated state given by Eq. (6). In order to simplify significantly the calculations and improve the convergence one imposes the following condition on the Pil operator 20,30…”

“…It has been argued that the pairing in CuO 2 /BSCCO results from the proximity effect, with the d-wave nodal lines avoided due to specific Fermi-surface topology in the monolayer or caused by magnetic ordering [4][5][6][7] . On the other hand, an intrinsic spin-orbital exchange induced pairing mechanism has been proposed, which leads to the nodeless superconducting state in a straightforward manner 8 .…”