12 citations · 16 across the 7 of their papers we have counts for
7 papers
Hanbury-Brown and Twiss exchange effects in a four-terminal tunnel junction
Jayanta Sarkar, Ciprian Padurariu, Antti Puska +2
We investigate the current-current correlations in a four-terminal Al-AlOx-Al tunnel junction where shot noise dominates. We demonstrate that cross-correlations in the presence of…
Cross correlations in disordered, four-terminal graphene-ribbon conductor: Hanbury-Brown and Twiss exchange as a sign of non-universality of noise
Zhenbing Tan, Teemu Nieminen, Antti Puska +7
We have investigated current-current correlations in a cross-shaped conductor made of graphene ribbons. We measured auto and cross correlations and compared them with the theoretic…
Fully superconducting Bloch-oscillating transistor: Amplification and bifurcation based on Bloch oscillations and counterflowing Cooper pairs
J. Leppäkangas, A. Puska, L. Äkäslompolo +2
The Bloch-oscillating transistor (BOT) is an amplifier that utilizes semiclassical dynamics of states in energy bands under traveling quasimomentum. In a BOT, a single quasiparticl…
Shot Noise in Lithographically Patterned Graphene Nanoribbons
Z. B. Tan, A. Puska, T. Nieminen +5
We have investigated shot noise and conductance of multi-terminal graphene nanoribbon devices at temperatures down to 50 mK. Away from the charge neutrality point, we find a Fano f…
Differential Bloch Oscillating Transistor Pair
Jayanta Sarkar, Antti Puska, Juha Hassel +1
We examine a Bloch Oscillating Transistor pair as a differential stage for cryogenic low-noise measurements. Using two oppositely biased, nearly symmetric Bloch Oscillating Transis…
Dynamics of Bloch oscillating transistor near bifurcation threshold
Jayanta Sarkar, Antti Puska, Juha Hassel +1
Tendency to bifurcate can often be utilized to improve performance characteristics of amplifiers or even to build detectors. Bloch oscillating transistor is such a device. Here we…
Incoherent Cooper pair tunneling and energy band dynamics in small Josephson junctions - A study of the Bloch Oscillating Transistor
Rene Lindell, Laura Korhonen, Antti Puska +1
We discuss the properties of devices of small Josephson junctions in the light of the phase fluctuation theory and the energy band structure, which arises from the delocalization o…