论文标题
由多体分子自旋在超导体上诱导的耦合Yu-shiba-rusinov状态
Coupled Yu-Shiba-Rusinov states induced by a many-body molecular spin on a superconductor
论文作者
论文摘要
超导体上的磁杂质诱导Yu-Shiba-Rusinov（YSR）结合状态，通过隧道光谱法检测到超导差距内长寿命的quasiparticle激发。耦合的YSR状态构成了工程师人工超导状态的基本要素，但它们的底物介导的相互作用通常很弱。在本文中，我们报告说，分子内（hund's的交换相互作用）在分子平台上产生耦合的YSR状态。我们沿Pb上的磁铁孢子蛋白测量了YSR光谱（111），并发现了两个轨道相互作用通道的证据，它们在整个分子上反转其颗粒孔不对称。数值计算表明，这两个通道的相同YSR不对称模式是由两个旋转旋转轨道引起的，具有相反的电势散射并强烈耦合。通过将电子隧穿到每个轨道中，可以同样激发两个通道，从而描绘了使用分子平台纠缠超导态态的新场景。
A magnetic impurity on a superconductor induces Yu-Shiba-Rusinov (YSR) bound states, detected by tunneling spectroscopy as long-lived quasiparticle excitations inside the superconducting gap. Coupled YSR states constitute basic elements to engineer artificial superconducting states, but their substrate-mediated interactions are generally weak. In this paper, we report that intramolecular (Hund's like) exchange interactions produce coupled YSR states across a molecular platform. We measured YSR spectra along a magnetic iron-porphyrin on Pb(111) and found evidences of two orbital interaction channels, which invert their particle-hole asymmetry across the molecule. Numerical calculations show that the identical YSR asymmetry pattern of the two channels is caused by two spin-hosting orbitals with opposite potential scattering and coupled strongly. Both channels can be similarly excited by tunneling electrons into each orbital, depicting a new scenario for entangled superconducting bound states using molecular platforms.
