Vanadyl spin qubit 2D arrays and their integration on superconducting resonators. Issue 3 (9th December 2019)

• Record Type: Journal Article
• Authors: Urtizberea, Ainhoa; Natividad, Eva; Alonso, Pablo J.; Pérez-Martínez, Laura; Andrés, Miguel A.; Gascón, Ignacio; Gimeno, Ignacio; Luis, Fernando; Roubeau, Olivier
• Is Part Of: Materials horizons. Volume 7:Issue 3(2020)
• Page Start: 885
• Page End: 897
• Publication Date: 2019-12-09
• Subjects: Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c9mh01594a
• Languages: English
• ISSNs: 2051-6347

Abstract

Abstract : 2D vanadyl porphyrin layers are shown to possess superior spin coherence and to purvey an optimal interface with superconducting circuits. Abstract : Vanadyl systems have been shown to possess superior quantum coherence among molecular spin qubits. Meanwhile two-dimensional (2D) networks of spin qubit nodes could provide a means to achieve the control of qubit localization and orientation required for implementation of molecular spin qubits in hybrid solid-state devices. Here, the 2D metal–organic framework [{VO(TCPP)}Zn2 (H2 O)2 ]∞ is reported and its vanadyl porphyrin node is shown to exhibit superior spin dynamics and to enable coherent spin manipulations, making it a valid spin qubit candidate. Nanodomains of the MOF 2D coordination planes are efficiently formed at the air–water interface, first under Langmuir–Schaefer conditions, allowing mono- and multiple layer deposits to be transferred to a variety of substrates. Similar nanodomains are then successfully formed in situ on the surface of Nb superconducting coplanar resonators. Transmission measurements with a resonator with a 14 μm-wide constriction allow to estimate that the single spin-photon coupling G 1 of the vanadyl spins in the nanodomains is close to being optimal, at ca. 0.5 Hz. Altogether, these results provide the basis for developing a viable hybrid quantum computing architecture.