论文标题
在三层蛋糕中的相邻Cuo $ _2 $层之间的Bogoliubov-Quasipartictic的杂交bi $ _2 $ _2 $ _2 $ _2 $ _2 $ ca $ _2 $ _2 $ _3 $ _3 $ _3 $ _ $ _ {10+δ} $由Arpes研究
Hybridization of Bogoliubov-quasiparticles between adjacent CuO$_2$ layers in the triple-layer cuprate Bi$_2$Sr$_2$Ca$_2$Cu$_3$O$_{10+δ}$ studied by ARPES
论文作者
论文摘要
Hybridization of Bogoliubov quasiparticles (BQPs) between the CuO$_2$ layers in the triple-layer cuprate high-temperature superconductor Bi$_2$Sr$_2$Ca$_2$Cu$_3$O$_{10+δ}$ is studied by angle-resolved photoemission spectroscopy (ARPES).在超导状态下，外部BQP频段之间打开了反交叉间隙，我们将其主要归因于层间单粒子跳，并从中间层配对中贡献了可能的贡献。我们发现，与先前的ARPES研究形成鲜明对比的是，这两个BQP频段的$ d $ - 波超导差距都可以平稳发展，而不会突然跳跃。 BQP之间的杂交也逐渐增加，从鼻子外区域转向抗恒星区域，这是通过层间单粒子跳跃的动量依赖性来解释的。讨论了提高超导过渡温度的可能机制，BQPS之间的杂交以及三重CUO $ _2 $层和自旋波动的声子模式的组合。
Hybridization of Bogoliubov quasiparticles (BQPs) between the CuO$_2$ layers in the triple-layer cuprate high-temperature superconductor Bi$_2$Sr$_2$Ca$_2$Cu$_3$O$_{10+δ}$ is studied by angle-resolved photoemission spectroscopy (ARPES). In the superconducting state, an anti-crossing gap opens between the outer- and inner-BQP bands, which we attribute primarily to interlayer single-particle hopping with possible contributions from interlayer Cooper pairing. We find that the $d$-wave superconducting gap of both BQP bands smoothly develops with momentum without abrupt jump in contrast to a previous ARPES study. Hybridization between the BQPs also gradually increases in going from the off-nodal to the anti-nodal region, which is explained by the momentum-dependence of the interlayer single-particle hopping. As possible mechanisms for the enhancement of the superconducting transition temperature, the hybridization between the BQPs, as well as the combination of phonon modes of the triple CuO$_2$ layers and spin fluctuations are discussed.
