Asymmetric [Dy2] molecules deposited into micro-SQUID susceptometers: <i>in situ</i> characterization of their magnetic integrity
The controlled integration of magnetic molecules into superconducting circuits is key to developing hybrid quantum devices. Herein, we study [Dy2] molecular dimers deposited into micro-SQUID susceptometers. The results of magnetic, heat capacity and magnetic resonance experiments, backed by theoretical calculations, show that each [Dy2] dimer fulfills the main requisites to encode a two-spin quantum processor. Arrays of between 2 × 10<sup>8</sup> and 7 × 10<sup>9</sup>[Dy2] molecules were optimally integrated under ambient conditions inside the 20 μm wide loops of micro-SQUID sensors by means of dip-pen nanolithography. Equilibrium magnetic susceptibility and phonon-assisted spin tunneling dynamics measured <i>in situ</i> substantiate that these molecules preserve spin ground states, magnetic interactions and magnetic asymmetry that characterize them in bulk. These results show that it is possible to interface multi-qubit molecular complexes with on-chip superconducting circuits without disturbing their relevant properties and suggest the potential of soft nanolithography techniques to achieve this goal.
Authors
- Ana Repollés
- Diego Gella (ORCID: https://orcid.org/0000-0001-5040-6728)
- Verónica Velasco (ORCID: https://orcid.org/0000-0002-2152-8643)
- Fernando Luis (ORCID: https://orcid.org/0000-0001-6284-0521)
- Anabel Lostao (ORCID: https://orcid.org/0000-0001-7460-5916)
- Olivier S. Roubeau (ORCID: https://orcid.org/0000-0003-2095-5843)
- María Carmen Pallarés (ORCID: https://orcid.org/0000-0002-1302-8833)
- Leoní A. Barrios (ORCID: https://orcid.org/0000-0001-7075-9950)
- Guillem Aromı́ (ORCID: https://orcid.org/0000-0002-0997-9484)
- David Aguilà (ORCID: https://orcid.org/0000-0001-8707-7833)
- Boris Le Guennic (ORCID: https://orcid.org/0000-0003-3013-0546)
- Jesús I. Martínez
- J. Sesé (ORCID: https://orcid.org/0000-0002-7742-9329)
- M.J. Pérez (ORCID: https://orcid.org/0000-0002-8125-877X)
- D. Drung (ORCID: https://orcid.org/0000-0003-3984-4940)
- Thomas Schurig
Institutions
- Physikalisch-Technische Bundesanstalt (DE)
- Centre National de la Recherche Scientifique (FR)
- Universidad de Zaragoza (ES)
- Fundacion Agencia Aragonesa para la Investigacion y el Desarrollo (ES)
- Institut des Sciences Chimiques de Rennes (FR)
- Instituto de Nanociencia y Materiales de Aragón (ES)
- Institut de Nanociència i Nanotecnologia de la Universitat de Barcelona
- Université de Rennes (FR)
- Universitat de Barcelona (ES)
Publication Details
- Journal
- Nanoscale
- Published
- 2024-10-23
- DOI
- https://doi.org/10.1039/d4nr03484h
- Citations
- 3
- Primary Topic
- Quantum and electron transport phenomena
- Type
- article
- Field-Weighted Citation Impact
- 1.01
Funders
- European Commission
- Generalitat de Catalunya
- Gobierno de Aragón
- Grand Équipement National De Calcul Intensif
- Consejo Superior de Investigaciones Científicas
- European Regional Development Fund
- Agencia Estatal de Investigación