Extending the Spin Excitation Lifetime of a Magnetic Molecule on a Proximitized Superconductor,Nano Letters

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Extending the Spin Excitation Lifetime of a Magnetic Molecule on a Proximitized Superconductor
Nano Letters ( IF 9.6 ) Pub Date : 2022-07-27 , DOI: 10.1021/acs.nanolett.2c00924
Katerina Vaxevani ₁ , Jingcheng Li _{1,

2} , Stefano Trivini ₁ , Jon Ortuzar ₁ , Danilo Longo ₁ , Dongfei Wang ₁ , Jose Ignacio Pascual _{1,

3}

Affiliation

Molecular spins on surfaces potentially used in quantum information processing and data storage require long spin excitation lifetimes. Normally, coupling of the molecular spin with the conduction electrons of metallic surfaces causes fast relaxation of spin excitations. However, the presence of superconducting pairing effects in the substrate can protect the excited spin from decaying. In this work, we show that a proximity-induced superconducting gold film can sustain spin excitations of a FeTPP-Cl molecule for more than 80 ns. This long value was determined by studying inelastic spin excitations of the S = 5/2 multiplet of FeTPP-Cl on Au films over V(100) using scanning tunneling spectroscopy. The spin lifetime decreases with increasing film thickness, along with the decrease of the effective superconducting gap. Our results elucidate the use of proximitized gold electrodes for addressing quantum spins on surfaces, envisioning new routes for tuning the value of their spin lifetime.

中文翻译：

延长近接超导体上磁性分子的自旋激发寿命

可能用于量子信息处理和数据存储的表面上的分子自旋需要较长的自旋激发寿命。通常，分子自旋与金属表面的传导电子的耦合会导致自旋激发的快速弛豫。然而，衬底中超导配对效应的存在可以保护激发的自旋不衰减。在这项工作中，我们表明邻近诱导的超导金膜可以维持 FeTPP-Cl 分子的自旋激发超过 80 ns。这个长值是通过研究S的非弹性自旋激发来确定的= 5/2 使用扫描隧道光谱法在 V(100) 上的 Au 薄膜上的 FeTPP-Cl 多重峰。自旋寿命随着薄膜厚度的增加以及有效超导间隙的减小而减小。我们的结果阐明了使用近似金电极来解决表面上的量子自旋问题，并设想了调整其自旋寿命值的新途径。

更新日期：2022-07-27

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