Tunneling singularities in the open Hubbard chain

Details Tunneling singularities in the open Hubbard chain Tunneling singularities in the open Hubbard chain

1999-05-19

arxiv.org/abs/cond-mat/9905275v2

Physica E 4 (1999) 246-155

Physics

Condensed Matter

LaTeX2e, 16 pp. incl. 9 figures

Scientific paper

10.1016/S1386-9477(99)00021-1

We study singularities in the I-V characteristics for sequential tunneling from resonant localized levels (e.g. a quantum dot) into a one dimensional electron system described by a Hubbard model. Boundary conformal field theory together with the exact solution of the Hubbard model subject to boundary fields allows to compute the exponents describing the singularity arising when the energy of the local level is tuned through the Fermi energy of the wire as a function of electron density and magnetic field. For boundary potentials with bound states a sequence of such singularities can be observed.

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