Title :
Negative Differential Transconductance and Nonreciprocal Effects in a Y-Branch Nanojunction: High-Frequency Analysis
Author :
Bednarz, Lukasz ; Rashmi ; Simon, Pascal ; Huynen, Isabelle ; González, Tomás ; Mateos, Javier
Author_Institution :
Microwave Lab., Univ. Catholique de Louvain, Louvain-la-Neuve
Abstract :
We report on negative differential transconductance (NDT) effect in Y-branch nanojunctions which leads to small-signal nonreciprocity of the device for certain biasing schemes. We present the dc analysis of the device from which we identify the bias regions where NDT effect occurs. We compare experimental dc measurements with results of Monte Carlo simulations, which yields very good qualitative and quantitative agreement. We perform a high-frequency analysis of the NDT effect up to 110 GHz which shows that the effect discussed is still present at such high frequencies
Keywords :
Monte Carlo methods; ballistic transport; high-frequency effects; nanotechnology; semiconductor devices; semiconductor heterojunctions; 2D electron gas; Monte Carlo simulations; NDT; Y-branch nanojunction; ballistic transport; dc measurements; high-frequency analysis; negative differential transconductance; nonreciprocal effects; Electrons; Frequency; Gain measurement; Hafnium; Nanoscale devices; Nanotechnology; Performance analysis; Scattering; Shape control; Transconductance; Active; HF measurements; Y-branch junction; gain; nanotechnology; negative differential conductance (NDC); nonlinear; room temperature; two-dimensional electron gas (2DEG);
Journal_Title :
Nanotechnology, IEEE Transactions on
DOI :
10.1109/TNANO.2006.885030
