Quantum coherence in a processable vanadyl complex: new tools for the search of molecular spin qubits

Abstract

A multitechnique investigation of an evaporable vanadyl spin system with long-lived quantum coherence that self-assembles on gold.

Magnetization Slow Dynamics in Ferrocenium Complexes

“…Remarkably, this simple approach reproduces extremely well the experimental data with an exponent ( n ) of 3.8(1) for the Raman term, suggesting that relaxation involves both optical and acoustic phonons . It is worth mentioning that, while Kramers ions are expected to have n= 9, smaller n values have been observed in a number of S = transition metal complexes which display slow relaxation of the magnetization …”

“…[48] It is worth mentioning that, while Kramers ions are expected to have n = 9, [32] smaller n values have been observed in an umber of S = 1 = 2 transition metal complexes which display slow relaxation of the magnetization. [13,[49][50][51][52][53][54][55] Overall, the analysis of both field and temperature dependences of the relaxation time below 6K and 1Tconfirmst hat direct and Raman mechanismsa re mainly responsible for the relaxation of the magnetization in [Fe(h 5 -C 5 Me 5 ) 2 ]BAr F .However, since the addition of other processes in our analysisw ill lead to over-parametrization, the presence of other activerelaxation pathways cannot be totally excluded.…”

Rational Design of Electronically Labile Dinuclear Fe and Co complexes with 1,10‐Phenanthroline‐5,6‐Diimine: A DFT study

“…Due to lability of their electronic shells transition metal coordination compounds with switchable magnetic properties represent key substructures of molecular electronics and spintronics devices . They have a good application prospect as single‐ion and single‐molecule magnets, molecular switches, sensors, and logical elements of quantum computers . Among the magnetically active systems, a special place is belonged to the transition metal complexes with redox‐active (noninnocent ) ligands, in which proximity of energy levels of the metal valence d ‐electrons and frontier molecular orbitals of the ligand creates opportunities for low‐energy barrier intramolecular electronic transfers (IETs).…”

Relaxation Dynamics and Magnetic Anisotropy in a Low‐Symmetry DyIII Complex

“…However, on increasing the magnetic field, the direct process gains importance due to the larger number of available phonons of correct energya nd can become the dominant contribution. [16] Finally, relaxation may occurt hrough aR aman process that gives am ore marked temperature dependence of the magnetic relaxation time (t)b ecause an interaction with phonons from the thermal bath and virtual energy states is involved. [17] It is quite clear that to correctly describe the relaxation processesi nt heses ystems, ad etailed pictureo fthee lectronic structure of the lanthanide ion and its relation to the molecular structure is needed.…”