Spectroscopy of the Kondo Problem in a Box

Details Spectroscopy of the Kondo Problem in a Box Spectroscopy of the Kondo Problem in a Box

2006-01-12

arxiv.org/abs/cond-mat/0601274v1

Phys. Rev. Lett. 96, 176802 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.96.176802

Motivated by experiments on double quantum dots, we study the problem of a single magnetic impurity confined in a finite metallic host. We prove an exact theorem for the ground state spin, and use analytic and numerical arguments to map out the spin structure of the excitation spectrum of the many-body Kondo-correlated state, throughout the weak to strong coupling crossover. These excitations can be probed in a simple tunneling-spectroscopy transport experiment; for that situation we solve rate equations for the conductance.

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