Correlation energy of conductance fluctuations in ballistic silver point contacts

Analysis of thermal conductance of ballistic point contacts

Ballistic conductance fluctuations in shape space.

Ballistic conductance fluctuations were measured in a GaAs quantum dot as a function of shape distortion and magnetic field. Shape distortion provides a novel source of conductance fluctuations and creates an effective “ensemble of dots,” allowing statistics to be studied at fixed field. Continuous changes in fluctuation statistics due to breaking of time-reversal symmetry are seen about zero m...

On Classical Fluctuations of Ballistic Conductance

Recently a method for investigation of classical to quantum crossover in ballistic transport was proposed2,3. It was expected to become an alternative of averaging over fictitious disorder used before 4 in order to mimic the effect of classical chaos. One advantage of the method was a possibility of explicit accurate construction of solutions of the Schrödinger equation built from short classic...

Origin of the 0.5 plateau in the ballistic conductance of quantum point contacts

A non-equilibrium Green function formalism (NEGF) is used to study the conductance of a side-gated quantum point contact (QPC) in the presence of lateral spin-orbit coupling (LSOC). A small difference of bias voltage between the two side gates (SGs) leads to an inversion asymmetry in the LSOC between opposite edges of the channel. This triggers a spontaneous spin polarization, which is signific...

Possible origin of the 0.5 plateau in the ballistic conductance of quantum point contacts

A non-equilibrium Green function formalism (NEGF) is used to study the conductance of a side-gated quantum point contact (QPC) in the presence of lateral spin-orbit coupling (LSOC). A small difference of bias voltage between the two side gates (SGs) leads to an inversion asymmetry in the LSOC between the opposite edges of the channel. In single electron modeling of transport, this triggers a sp...