Metal-ligand Covalency Enables Room Temperature Molecular Qubit Candidates

Overview

Journal Chem Sci

Publisher Royal Society of Chemistry

Specialty Chemistry

Date 2019 Aug 2

PMID 31367325

Citations 16

Authors

Majed S Fataftah

Matthew D Krzyaniak

Bess Vlaisavljevich

Michael R Wasielewski

Joseph M Zadrozny

Danna E Freedman

Affiliations

Soon will be listed here.

Abstract

Harnessing synthetic chemistry to design electronic spin-based qubits, the smallest unit of a quantum information system, enables us to probe fundamental questions regarding spin relaxation dynamics. We sought to probe the influence of metal-ligand covalency on spin-lattice relaxation, which comprises the upper limit of coherence time. Specifically, we studied the impact of the first coordination sphere on spin-lattice relaxation through a series of four molecules featuring V-S, V-Se, Cu-S, and Cu-Se bonds, the PhP salts of the complexes [V(CHS)] (), [Cu(CHS)] (), [V(CHSe)] (), and [Cu(CHSe)] (). The combined results of pulse electron paramagnetic resonance spectroscopy and ac magnetic susceptibility studies demonstrate the influence of greater M-L covalency, and consequently spin-delocalization onto the ligand, on elongating spin-lattice relaxation times. Notably, we observe the longest spin-lattice relaxation times in , and spin echos that survive until room temperature in both copper complexes ( and ).

Citing Articles

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