368 citations · 1k across the 28 of their papers we have counts for
8 papers · 1 filter
Efficient thermionic operation and phonon isolation by a semiconductor-superconductor junction
Emma Mykkänen, Janne S. Lehtinen, Leif Grönberg +6
Control of heat flux at small length scales is crucial for numerous solid-state devices and systems. In addition to the thermal management of information and communication devices…
Accurate Coulomb Blockade Thermometry up to 60 Kelvin
M. Meschke, A. Kemppinen, J. P. Pekola
We demonstrate experimentally a precise realization of Coulomb Blockade Thermometry (CBT) working at temperatures up to 60 K. Advances in nano fabrication methods using electron be…
Single-electron current sources: towards a refined definition of ampere
J. P. Pekola, O. -P. Saira, V. F. Maisi +4
Controlling electrons at the level of elementary charge has been demonstrated experimentally already in the 1980's. Ever since, producing an electrical current , or its int…
Long hold times in a two-junction electron trap
A. Kemppinen, S. V. Lotkhov, O. -P. Saira +3
The hold time of a single-electron trap is shown to increase significantly due to suppression of environmentally assisted tunneling events. Using two rf-tight radiation shields…
Electronic Radio-Frequency Refrigerator
S. Kafanov, A. Kemppinen, Yu. A. Pashkin +3
We demonstrate experimentally that a hybrid single-electron transistor with superconducting leads and a normal-metal island can be refrigerated by an alternating voltage applied to…
Experimental investigation of hybrid single-electron turnstiles with high charging energy
A. Kemppinen, S. Kafanov, Yu. A. Pashkin +3
We present an experimental study of hybrid turnstiles with high charging energies in comparison to the superconducting gap. The device is modeled with the sequential tunneling appr…
Quantized current of a hybrid single-electron transistor with superconducting leads and a normal-metal island
Antti Kemppinen, Matthias Meschke, Mikko Möttönen +2
We discuss the operation of the superconductor - insulator - normal-metal - insulator - superconductor (SINIS) turnstile. This voltage-biased hybrid single-electron transistor (SET…
Suppression of the critical current of a balanced SQUID
Antti Kemppinen, Antti J. Manninen, Mikko Möttönen +3
We present an experimental study of the magnetic flux dependence of the critical current of a balanced SQUID with three Josephson junctions in parallel. Unlike for ordinary dc SQUI…