774 citations
- Helsinki Institute of PhysicsFI5 papers
- University of HelsinkiFI4 papers
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- Landau Institute for Theoretical PhysicsRU3 papers
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- Agenzia Spaziale ItalianaIT2 papers
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- Astronomical Observatory of RomeIT2 papers
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12 papers · 1 filter
Self heating and nonlinear current-voltage characteristics in bilayer graphene
J. K. Viljas, A. Fay, M. Wiesner +1
We demonstrate by experiments and numerical simulations that the low-temperature current-voltage characteristics in diffusive bilayer graphene (BLG) exhibit a strong superlinearity…
Single-electron heat diode
Tomi Ruokola, Teemu Ojanen
We introduce a new functional nanoscale device, a single-electron heat diode, consisting of two quantum dots or metallic islands coupled to electronic reservoirs by tunnel contacts…
Spin-asymmetric graphene nanoribbons in graphane on silicon dioxide
M. Ijäs, P. Havu, A. Harju +1
Hydrogenated graphene, graphane, is studied on oxygen-terminated silicon dioxide substrate using ab initio calculations. A structure with hydrogenation only on one side of the grap…
Electrical manipulation and measurement of spin properties of quantum spin Hall edge states
Jukka I. Väyrynen, Teemu Ojanen
We study effects of a gate-controlled Rashba spin-orbit coupling to quantum spin-Hall edge states in HgTe quantum wells. A uniform Rashba coupling can be employed in tuning the spi…
Giant current fluctuations in an overheated single electron transistor
M. A. Laakso, T. T. Heikkilä, Yuli V. Nazarov
Interplay of cotunneling and single-electron tunneling in a thermally isolated single-electron transistor (SET) leads to peculiar overheating effects. In particular, there is an in…
Electron-phonon coupling in single walled carbon nanotubes determined by shot noise
Fan Wu, Pauli Virtanen, Soren Andresen +2
We have measured shot noise in metallic single-walled carbon nanotubes of length L=1 m and have found strong suppression of noise with increasing voltage. We conclude that the c…