Entanglement in Supramolecular Spin Systems of Two Weakly Coupled Antiferromagnetic Rings (Purple-Cr7Ni)

被引：99

作者：

Candini, A. ^{[1
]}

Lorusso, G. ^{[1
,2
]}

Troiani, F. ^{[1
]}

Ghirri, A. ^{[1
]}

Carretta, S. ^{[1
,3
,4
]}

Santini, P. ^{[1
,3
,4
]}

Amoretti, G. ^{[1
,3
,4
]}

Muryn, C. ^{[5
]}

Tuna, F. ^{[5
]}

Timco, G. ^{[5
]}

McInnes, E. J. L. ^{[5
]}

Winpenny, R. E. P. ^{[5
]}

Wernsdorfer, W. ^{[6
]}

Affronte, M. ^{[1
,2
]}

机构：

[1] CNR, INFM, Natl Res Ctr NanoStruct & BioSyst Surfaces S3, I-41100 Modena, Italy

[2] Univ Modena & Reggio Emilia, Dipartimento Fis, I-41100 Modena, Italy

[3] Univ Parma, Dipartimento Fis, I-43100 Parma, Italy

[4] Unita CNISM Parma, I-43100 Parma, Italy

[5] Univ Manchester, Sch Chem, Lewis Magnetism Lab, Manchester M13 9PL, Lancs, England

[6] CNRS, Inst L Neel, F-38042 Grenoble, France

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 03期

基金：

英国工程与自然科学研究理事会;

关键词：

SINGLE-MOLECULE MAGNETS; DIMER;

D O I：

10.1103/PhysRevLett.104.037203

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We characterize supramolecular magnetic structures, consisting of two weakly coupled antiferromagnetic rings, by low-temperature specific heat, susceptibility, magnetization and electron paramagnetic resonance measurements. Intra- and inter-ring interactions are modeled through a microscopic spin-Hamiltonian approach that reproduces all the experimental data quantitatively and legitimates the use of an effective two-qubit picture. Spin entanglement between the rings is experimentally demonstrated through magnetic susceptibility below 50 mK and theoretically quantified by the concurrence.

引用

页数：4

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