量子隧道
凝聚态物理
电导
共发射极
材料科学
振幅
退火(玻璃)
硅
电子
热传导
光电子学
物理
光学
量子力学
复合材料
作者
Gert Andersson,Mats Andersson,Olof Engström
摘要
Observations of discrete conductance fluctuations are reported at voltages well below the breakdown voltage in selected reverse‐biased p+‐n++ base‐emitter junctions originating from gate turn‐off thyristors. The occurrence of the phenomenon is attributed to the presence of defect clusters at the p‐n junctions. The defect clusters introduce field confinements which activate tunneling processes that would not otherwise be present in these nonabrupt p‐n junctions. The fluctuating reverse current was only observed in voltage and temperature regions where the total reverse current was influenced by tunneling‐related conduction mechanisms. The experimental observations concerning the voltage and temperature dependences of the fluctuation amplitude and rate deviate from earlier reports on decisive points. Both the amplitude and the switching rate of the observed fluctuations were unstable in time and influenced by the measurement procedure itself. This instability is attributed to small structural changes of the...
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