A Clock Transition in the Cr7Mn Molecular Nanomagnet
| Autor: | C. A. Collett, Kevin R. Kittilstved, Grigore A. Timco, Kai-Isaak Ellers, Nicholas Russo, Richard E. P. Winpenny, Jonathan R. Friedman |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Coherence time
Quantum decoherence Field (physics) clock transition FOS: Physical sciences 02 engineering and technology 01 natural sciences lcsh:Chemistry 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Materials Chemistry 010306 general physics Hyperfine structure Physics Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics electron spin resonance Resonance 021001 nanoscience & nanotechnology Nanomagnet Electronic Optical and Magnetic Materials Dipole molecular nanomagnet lcsh:QD1-999 Chemistry (miscellaneous) Qubit 0210 nano-technology |
| Zdroj: | Magnetochemistry Volume 5 Issue 1 Magnetochemistry, Vol 5, Iss 1, p 4 (2019) |
| ISSN: | 2312-7481 |
| DOI: | 10.3390/magnetochemistry5010004 |
| Popis: | A viable qubit must have a long coherence time $T_2$. In molecular nanomagnets $T_2$ is often limited at low temperatures by the presence of dipole and hyperfine interactions, which are often mitigated through sample dilution, chemical engineering and isotope substitution in synthesis. Atomic-clock transitions offer another route to reducing decoherence from environmental fields by reducing the effective susceptibility of the working transition to field fluctuations. The Cr$_7$Mn molecular nanomagnet, a heterometallic ring, features a clock transition at zero field. Both continuous-wave and spin-echo electron-spin resonance experiments on Cr$_7$Mn samples diluted via co-crystallization, show evidence of the effects of the clock transition with a maximum $T_2\sim350$ ns at 1.8 K. We discuss improvements to the experiment that may increase $T_2$ further. 4 pages, 4 figures, submitted to Magnetochemistry |
| Databáze: | OpenAIRE |
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