Andreev Transport through a Magnetic Molecule Weakly Coupled to Ferromagnetic Leads

• Authors: F. Pawlicki , I. Weymann
• Languages of publication: EN

Abstracts

EN

The Andreev transport through a single molecular magnet coupled to two external ferromagnetic leads and one superconducting electrode is studied theoretically by means of the real-time diagrammatic technique. The calculations are performed by including the sequential tunneling processes between the molecule and ferromagnetic leads, while the coupling to superconductor can be arbitrary. We analyze the dependence of the Andreev current and tunnel magnetoresistance on various intrinsic parameters of the molecule. The superconducting proximity effect results in the formation of molecular Andreev bound states. We show that the transport behavior depends greatly on the type of internal exchange interaction of the molecule, which can lead to corresponding sign changes of the tunnel magnetoresistance of the device.

Keywords

EN

73.23.-b; 74.45.+c; 75.50.Xx

Discipline

• 75.50.Xx: Molecular magnets
• 73.23.-b: Electronic transport in mesoscopic systems
• 74.45.+c: Proximity effects; Andreev reflection; SN and SNS junctions

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2018
• Volume: 133
• Issue: 3
• Pages: 594-596

Dates

published

2018-03

Contributors

author

F. Pawlicki

• Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

author

I. Weymann

• Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

References

• [1] L. Bogani, W. Wernsdorfer, Nature Mat. 7, 179 (2008), doi: 10.1038/nmat2133
• [2] C. Timm, F. Elste, Phys. Rev. B 73, 235304 (2006), doi: 10.1103/PhysRevB.73.235304
• [3] M. Misiorny, I. Weymann, J. Barnaś, Phys. Rev. B 79, 224420 (2009), doi: 10.1103/PhysRevB.79.224420
• [4] T. Domański, I. Weymann, M. Barańska, G. Górski, Sci. Rep. 6, 23336 (2016), doi: 10.1038/srep23336
• [5] H. Schoeller, G. Schön, Phys. Rev. B 50, 18436 (1994), doi: 10.1103/PhysRevB.50.18436
• [6] M. Governale, M. Pala, J. König, Phys. Rev. B 77, 134513 (2008), doi: 10.1103/PhysRevB.77.134513
• [7] I. Weymann, P. Trocha, Phys. Rev. B 89, 115305 (2014), doi: 10.1103/PhysRevB.89.115305
• [8] B. Sothmann, D. Futterer, M. Governale, J. König, Phys. Rev. B 82, 094514 (2010), doi: 10.1103/PhysRevB.82.094514

Identifiers

DOI

10.12693/APhysPolA.133.594