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2001

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Supplement

  

Superconductor-metal-insulator transitions


Metallic single-electron transistor without traditional tunnel barriers

 a,  b,  b,  a,  c
a Lomonosov Moscow State University, Faculty of Physics, Laboratory of Cryoelectronics, Vorob'evy Gory, Moscow, 119992, Russia , Moscow , Russia
b Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics, Leninskie Gory 1 build. 2, Moscow, 119991, Russian Federation
c Physikalisch-Technische Bundesanstalt, Braunschweig, Germany

We report a new type of single-electron transistor (SET) comprising two highly resistive Cr thin-film strips (1 μm long) connecting a 1μm-long Al island to two Al outer electrodes. These resistors replace small-area oxide tunnel junctions of traditional SETs. Our transistor with a total asymptotic resistance of 110 kΩ showed a very sharp Coulomb blockade and reproducible, deep and strictly eperiodic gate modulation in wide ranges of bias currents I and gate voltages Vg. In the Coulomb blockade region (|V| about 0.5 mV), we observed a strong suppression of the co-tunneling current allowing appreciable modulation curves V(Vg) to be measured at currents I as low as 100 fA. The noise figure of our SET was found to be similar to that of typical Al/AlOx/Al single-electron transistors, viz. δQ5×104e/Hz at 10 Hz.

Fulltext pdf (271 KB)
Fulltext is also available at DOI: 10.1070/1063-7869/44/10S/S25
PACS: 71.30.+h, 73.23.Hk, 74.50.+r, 74.76.-w (all)
DOI: 10.1070/1063-7869/44/10S/S25
URL: https://ufn.ru/en/articles/2001/13/y/
Citation: Krupenin V A, Zorin A B, Presnov D E, Savvateev M N, Niemeyer J "Metallic single-electron transistor without traditional tunnel barriers" Phys. Usp. 44 113–116 (2001)
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Оригинал: Krupenin V A, Zorin A B, Presnov D E, Savvateev M N, Niemeyer J «Metallic single-electron transistor without traditional tunnel barriers» УФН 171 113–116 (2001); DOI: 10.1070/1063-7869/44/10S/S25

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