POSSIBILITY OF HIGH-TEMPERATURE EVALUATION OF PHASE COHERENT LENGTH OF HOT-ELECTRONS IN TRIPLE-BARRIER RESONANT-TUNNELING DIODES

To investigate the possibility of estimating hot electron phase cohere nce at high temperature, the current-voltage (I-V) characteristic of a triple-barrier resonant tunneling diode (TBRTD) is analyzed taking ph ase breaking into account. When the central barrier width is larger th an 7 nm in GaInAs/InP TBRTD, the width of the peak in the I-V curve is determined predominantly by the phase breaking. Therefore the peak wi dth provides the information of the phase coherent length of the hot e lectrons. It is shown that the phase coherent length can be estimated up to 100 K using TBRTD.