摘要
The family of cubic polyoxopalladates encapsulating lanthanide ions[LnPd_(12)(AsPh)_(8)O_(32)]^(5−)where Ln=Tb,Dy,Ho,Er and Tm,is magnetically characterised and theoretically described by the Radial Effective Charge(REC)model and a phenomenological crystal-field approach using the full-hamiltonian,in the SIMPRE and CONDON packages respectively.The lack of anisotropy generates an extraordinarily rich energy level structure at low temperatures,which allows us to study how such a structure is affected by lifting the strict cubic symmetry and/or by applying an external magnetic field.In particular,we will explore the possibility of using these cubic Ln complexes as spin-qubits.We will focus on the Ho derivative.We find that it is possible to reach a regime where decoherence caused by the nuclear spin bath is quenched for moderate axial compression of the cube and small magnetic fields.
基金
funded by the EU(ERC Advanced Grant SPINMOL and ERC Consolidator Grant DECRESIM),the Spanish MINECO(grant MAT2014-56143-R,CTQ2014-52758-P)
the Generalitat Valenciana(Prometeo and ISIC Programmes of excellence).A.G.-A.acknowledges funding by the MINECO(Ramón y Cajal contract).E.C.and J.J.B.acknowledge the Blaise Pascal International Chair for financial support
J.J.B.also thanks the Spanish MECD for an FPU predoctoral grant.U.K.thanks the German Science Foundation(DFG KO-2288/20-1 and KO-2288/8-1)
Jacobs University for research support,and also acknowledges the COST Actions CM1006(EUFEN)and CM1203(PoCheMoN).P.Y.thanks the CSC(China Scholarship Council)for a doctoral fellowship.
