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Biomedical subjects

M Sassetti

Publications and source records attributed to M Sassetti.

14 recordsLinked to original sources
PubMed2004

Negative differential conductance induced by spin-charge separation.

Spin-charge states of correlated electrons in a one-dimensional quantum dot attached to interacting leads are studied in the nonlinear transport regime. With nonsymmetric tunnel barriers, regions of negative differential conductance induced by spin-charge separation are found. They are due to a correlation-induced trapping of higher-spin states without magnetic field and are associated with a strong increase in the fluctuations of the electron spin.

Journal Article↗
PubMed2001

Control of spin in quantum dots with non-Fermi-liquid correlations.

Spin effects in the transport properties of a quantum dot with spin-charge separation are investigated. It is found that the nonlinear transport spectra are dominated by spin dynamics. Strong spin polarization effects are observed in a magnetic field. They can be controlled by varying gate and bias voltages. Complete polarization is stable against interactions. When polarization is not complete it is power law enhanced by non-Fermi-liquid effects.

Journal Article↗