Spin Dynamics and Low Energy Vibrations: Insights from Vanadyl-Based Potential Molecular Qubits

Anno: 2017

Autori: Atzori M., Tesi L., Benci S., Lunghi A., Righini R., Taschin A., Torre R., Sorace L., Sessoli R.

Affiliazione autori: Univ Firenze, Dipartimento Chim Ugo Schiff, I-50019 Sesto Fiorentino, Italy; Univ Firenze, INSTM RU, I-50019 Sesto Fiorentino, Italy; Univ Firenze, European Lab Nonlinear Spect, I-150019 Sesto Fiorentino, Italy; Trinity Coll Dublin, AMBER & CRANN, Sch Phys, Dublin 2, Ireland; Uni Firenze, Dipartimento Fis Astron, I-150019 Sesto Fiorentino, Italy.

Abstract: Here we report the investigation of the magnetization dynamics of a vanadyl complex with diethyldithiocarbamate (Et(2)dtc(-)) ligands, namely [VO-(Et(2)dtc)(2)] (1), in both solid-state and frozen solution. This showed an anomalous and unprecedentedly observed field dependence of the relaxation time, which was modeled with three contributions to the relaxation mechanism. The temperature dependence of the weight of the two processes dominating at low fields was found to well correlate with the low energy vibrations as determined by THz spectroscopy. This detailed experimental comparative study represents a fundamental step to understand the spin dynamics of potential molecular quantum bits, and enriches the guidelines to design molecule-based systems with enhanced quantum coherence.

Giornale/Rivista: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

Volume: 139 (12)      Da Pagina: 4338  A: 4341

Maggiori informazioni: The financial support of Italian MIUR (PRIN Project 2015 HYFSRT), Fondazione Ente Cassa di Risparmio di Firenze, and European COST (CA15128 MOLSPIN) is acknowledged.
Parole chiavi: Temperature Quantum Coherence; Lattice-relaxation; Long Coherence; Times; Complexes; Magnets; Design
DOI: 10.1021/jacs.7b01266

Citazioni: 125
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-05-18
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