A Porphyrin Spin Qubit and Its 2D Framework Nanosheets. (6th June 2018)

• Record Type: Journal Article
• Authors: Urtizberea, Ainhoa; Natividad, Eva; Alonso, Pablo J.; Andrés, Miguel A.; Gascón, Ignacio; Goldmann, Michel; Roubeau, Olivier
• Is Part Of: Advanced functional materials. Volume 28:Number 31(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-06-06
• Subjects: magnetic materials -- metal–organic frameworks -- porphyrin -- spin relaxation -- thin films; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.201801695
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract: Molecular spin qubits have been shown to reach sufficiently long quantum coherence times to envision their use as hardware in quantum processors. These will however require their implementation in hybrid solid‐state devices for which the controlled localization and homogeneous orientation of the molecular qubits will be necessary. An alternative to isolated molecules that can ensure these key aspects is 2D framework in which the qubit would act as node. In this work, it is demonstrated that the isolated metalloporphyrin [Cu(H4 TCPP)] molecule is a potential spin qubit, and maintains similar quantum coherence as node in a 2D [{CuTCPP}Zn2 (H2 O)2 ] metal–organic framework. Mono‐ and multilayer deposits of nanosheets of a similar 2D framework are then successfully formed following a modular method based on Langmuir–Schaefer conditions. The orientation of the {CuTCPP} qubit nodes in these nanosheets is homogeneous parallel to the substrate. These nanosheets are also formed with a control over the qubit concentration, i.e., by dilution with the unmetallated porphyrin. Eventually, 2D nanosheets are formed in situ directly on a substrate, through a simple protocol devised to reproduce the Langmuir–Schaefer conditions locally. Altogether these studies show that 2D spin qubit frameworks are ideal components to develop a hybrid quantum computing architecture. Abstract : A copper metalloporphyrin molecule is assembled into 2D metal–organic framework (MOF) grids through diamagnetic nodes, both as a bulk material and nanosheets on substrates, and exhibits significant quantum coherence. The 2D MOF nanosheets can be made magnetically dilute as well as directly in situ on a substrate, two key requirements for their implementation into hybrid quantum computing architectures.