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

• DOI: 10.1021/acs.nanolett.2c00924
• Publication Date: 2022-07-27T18:53:00Z
• Authors: Katerina Vaxevani; Jingcheng Li; Stefano Trivini; Jon Ortuzar; Danilo Longo; Dongfei Wang; Jose Ignacio Pascual
• Keywords: Physical Phenomena; Superconductivity; Condensed Matter - Mesoscale and Nanoscale Physics; Spectrum Analysis; Mesoscale and Nanoscale Physics (cond-mat.mes-hall); 0103 physical sciences; FOS: Physical sciences; Gold; 01 natural sciences

Magnetic molecules deposited on surfaces are a promising platform to individually address and manipulate spins. Long spin excitation lifetimes necessary utilize them in quantum information processing data storage. Normally, coupling of the molecular with conduction electrons metallic causes fast relaxation excitations into ground state. However, presence superconducting paring effects substrate can protect excited from decaying. In this work, we show that proximity-induced gold film sustain FeTPP-Cl molecule for more than 80ns. This long value was determined by studying inelastic S=5/2 multiplet Au films over V(100) using scanning tunneling spectroscopy. The lifetime decreases increasing thickness, apparent connection gradual gap-closing pair de Gennes-Saint James resonances found inside gap. Our results elucidate use proximitized electrodes addressing spins surfaces, envisioning new routes tuning their lifetime.