Spin dynamics of Dy<sub>2</sub> molecules deposited onto micro-SQUID sensors

ORAL

Abstract

We report the results of ac susceptibility measurements performed down to very low temperatures (T > 13 mK) on thin layers of asymmetric Dy2 molecular coordination complexes that have been proposed as candidates for the realization of 2-qubit quantum gates. The molecules are integrated into a μ-SQUID susceptometer by means of Dip Pen Nanolithography. Frequency-dependent susceptibility data measured on 5 and 20 molecular layers thick films are compared with similar results obtained for bulk polycrystalline samples. The results show that the magnetic anisotropy, exchange interactions and spin tunneling rates of Dy2 units largely remain intact at the surface. Low-nuclearity lanthanide magnetic clusters might then provide suitable building blocks for the development of a scalable hybrid quantum architecture.

*We acknowledge support from EU (FATMOLS FETOPEN-RIA-2019-01 862893, QUANTERA SUMO), Spanish MCIU/AEI/FEDER (RTI-2018-096075-B-C21, PCI2018-093116) and CSIC Research Platform PTI-001

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Publication: D. Gella et al, Spin dynamics of Dy2 molecules deposited onto micro-SQUID sensors, (2022), manuscript in preparation.

Presenters

  • Fernando M Luis

    • INMA(CSIC-U. Zaragoza)
    • Spanish National Research Council (CSIC) / University of Zaragoza
    • Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, C/ Pedro Cerbuna 12, 50009 Zaragoza, Spain.
    • Instituto de Nanociencia y Materiales de Aragón (CSIC-Universidad de Zaragoza)
    • Consejo Superior de Investigaciones Cientificas (CSIC) / Universidad de Zaragoza / INMA
    • Spanish National Research Council (CSIC)

Authors

  • Fernando M Luis

    • INMA(CSIC-U. Zaragoza)
    • Spanish National Research Council (CSIC) / University of Zaragoza
    • Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, C/ Pedro Cerbuna 12, 50009 Zaragoza, Spain.
    • Instituto de Nanociencia y Materiales de Aragón (CSIC-Universidad de Zaragoza)
    • Consejo Superior de Investigaciones Cientificas (CSIC) / Universidad de Zaragoza / INMA
    • Spanish National Research Council (CSIC)

  • Diego Gella

    • INMA (CSIC-U. Zaragoza)

  • Maria Carmen Pallares

    • INMA (CSIC-U. Zaragoza)

  • Veronica Velasco

    • Departament de Química Inorgànica, Universitat de Barcelona

  • Ana Repolles

    • INMA (CSIC-U. Zaragoza)

  • Mark D Jenkins

    • INMA (CSIC-U. Zaragoza)

  • David Aguila

    • Departament de Química Inorgànica, Universitat de Barcelona

  • Olivier Roubeau

    • INMA (CSIC-U. Zaragoza)
    • Instituto de Nanociencia y Materiales de Aragón (CSIC-Universidad de Zaragoza)

  • Anabel Lostao

    • INMA (CSIC-U. Zaragoza) and ARAID

  • Leoni Barrios

    • Departament de Química Inorgànica, Universitat de Barcelona

  • Javier Sese

    • INMA (CSIC-U. Zaragoza)

  • Dietmar Drung

    • Physikalisch-Technische Bundesanstalt, Berlin

  • Thomas Schurig

    • Physikalisch-Technische Bundesanstalt, Berlin

  • María Jose (Pepa) Martínez-Pérez

    • INMA (CSIC-U. Zaragoza)
    • Consejo Superior de Investigaciones Cientificas (CSIC) / Universidad de Zaragoza / INMA

  • Guillem Aromi

    • Departament de Química Inorgànica, Universitat de Barcelona