Quantum Transport Through a Stretched Spin--1 Molecule

Details Quantum Transport Through a Stretched Spin--1 Molecule Quantum Transport Through a Stretched Spin--1 Molecule

2010-07-23

arxiv.org/abs/1007.4214v2

EPL 93 47005 (2011)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 3 figures, minor changes, accepted for publication in EPL

Scientific paper

10.1209/0295-5075/93/47005

We analyze the electronic transport through a model spin-1 molecule as a function of temperature, magnetic field and bias voltage. We consider the effect of magnetic anisotropy, which can be generated experimentally by stretching the molecule. In the experimentally relevant regime the conductance of the unstretched molecule reaches the unitary limit of the underscreened spin- 1 Kondo effect at low temperatures. The magnetic anisotropy generates an antiferromagnetic coupling between the remaining spin 1/2 and a singular density of quasiparticles, producing a second Kondo effect and a reduced conductance. The results explain recent measurements in spin-1 molecules [Science 328 1370 (2010)].

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