Direct observation of standing electron waves in diffusively conducting inas nanowire

Investigations of local electronic transport in InAs nanowires by scanning gate microscopy at liquid helium temperatures

“…In [31] the observed wobbling of the Coulomb blockade conductance lines may be explained within the above model if the level width of dots are not equal, see Fig. 5 in [31].…”

“…The next main parameters are used to characterize this system: dot 1(2) to back-gate capacitance (C 1(2)BG ), the mutual capacitance of the dots (C m ), and the capacitance of dot 1(2) to the left(right) contact (C L(R) ), the width of the energy levels of dot 1(2) (Γ 1 (2) ). The explicit expression of dot 1(2) to tip capacitance C 1(2)t on the tip to dot distance can be found in [31]. The presence of the charged AFM tip results in an additional charge induced in dot 1 (2) …”

“…[31]. In this model the InAs wire is considered to be divided into two sequentially connected quantum dots.…”

“…2 )) to calculate the current through the system, where µ 1 and µ 2 are the electrochemical potentials of dot 1 and 2, respectively [31,32], the Fermi level energy of metallic contacts is assumed to be zero.…”

“…Thus, a wide range of scenarios from closed sequentially connected quantum dots demonstrating Coulomb blockade to metallic diffusive wire are realized and investigated. Special attention is devoted to induced negative differential conductance (NDC) [24] and recently observed quasiperiodic oscillations [25,26].…”