Abstract
| Original language | English |
|---|---|
| Article number | 224514 |
| Journal | Physical Review B: Condensed Matter and Materials Physics |
| Volume | 87 |
| Issue number | 22 |
| DOIs | |
| Publication status | Published - 2013 |
| MoE publication type | A1 Journal article-refereed |
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Dynamics of Bloch oscillating transistor near the bifurcation threshold. / Sarkar, J.; Puska, A.; Hassel, Juha; Hakonen, P.J.
In: Physical Review B: Condensed Matter and Materials Physics, Vol. 87, No. 22, 224514, 2013.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Dynamics of Bloch oscillating transistor near the bifurcation threshold
AU - Sarkar, J.
AU - Puska, A.
AU - Hassel, Juha
AU - Hakonen, P.J.
PY - 2013
Y1 - 2013
N2 - The tendency to bifurcate can often be utilized to improve performance characteristics of amplifiers or even to build detectors. The Bloch oscillating transistor is such a device. Here, we show that bistable behavior can be approached by tuning the base current and that the critical value depends on the Josephson coupling energy EJ of the device. We demonstrate current-gain enhancement for the device operating near the bifurcation point at small EJ. From our results for the current gains at various EJ, we determine the bifurcation threshold on the EJ-base current plane. The bifurcation threshold curve can be understood using the interplay of interband and intraband tunneling events.
AB - The tendency to bifurcate can often be utilized to improve performance characteristics of amplifiers or even to build detectors. The Bloch oscillating transistor is such a device. Here, we show that bistable behavior can be approached by tuning the base current and that the critical value depends on the Josephson coupling energy EJ of the device. We demonstrate current-gain enhancement for the device operating near the bifurcation point at small EJ. From our results for the current gains at various EJ, we determine the bifurcation threshold on the EJ-base current plane. The bifurcation threshold curve can be understood using the interplay of interband and intraband tunneling events.
U2 - 10.1103/PhysRevB.87.224514
DO - 10.1103/PhysRevB.87.224514
M3 - Article
VL - 87
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 22
M1 - 224514
ER -