Zobrazeno 1 - 10
of 74
pro vyhledávání: '"Taskinen, P. J."'
The hysteresis observed in the magnetoresistance of bilayer 2D systems in the quantum Hall regime is generally attributed to the long time constant for charge transfer between the 2D systems due to the very low conductivity of the quantum Hall bulk s
Externí odkaz:
http://arxiv.org/abs/1009.5468
We discuss the development of a sensitive electrometer that utilizes a two-dimensional electron gas (2DEG) in the quantum Hall regime. As a demonstration, we measure the evolution of the Landau levels in a second, nearby 2DEG as the applied perpendic
Externí odkaz:
http://arxiv.org/abs/1003.5017
Autor:
Taskinen, L. J., Starrett, R. P., Martin, T. P., Micolich, A. P., Hamilton, A. R., Simmons, M. Y., Ritchie, D. A., Pepper, M.
We have embedded an AlGaAs/GaAs based, gated 2D hole system (2DHS) into an impedance transformer $LC$ circuit, and show that by using radio-frequency reflectometry it is possible to perform sensitive, large bandwidth, electrical resistance measuremen
Externí odkaz:
http://arxiv.org/abs/0810.5184
Publikováno v:
J. Low Temp. Phys. 146, 213 (2007)
We have studied thermal gradients in thin Cu and AlMn wires, both experimentally and theoretically. In the experiments, the wires were Joule heated non-uniformly at sub-Kelvin temperatures, and the resulting temperature gradients were measured using
Externí odkaz:
http://arxiv.org/abs/cond-mat/0607809
Autor:
Taskinen, L. J., Maasilta, I. J.
Publikováno v:
Appl. Phys. Lett. 89, 143511 (2006), slightly modified
We have used normal metal-insulator-superconductor tunnel junctions as thermometers at sub-Kelvin temperatures to study the electron-phonon (e-p) interaction in thin Aluminum films doped with Manganese, as a function of Manganese concentration. Mn in
Externí odkaz:
http://arxiv.org/abs/cond-mat/0604514
Publikováno v:
Phys. Stat. Solidi (c) 1, 2856 (2004)
We have used normal metal-insulator-superconductor (NIS) tunnel junction pairs, known as SINIS structures, for ultrasensitive thermometry at sub-Kelvin temperatures. With the help of these thermometers, we have developed an ac-technique to measure th
Externí odkaz:
http://arxiv.org/abs/cond-mat/0410283
Publikováno v:
Phys. Stat. Solidi (c) 1, 2799 (2004)
We have studied the electron-phonon (e-p) interaction in thin Cu and Au films at sub-Kelvin temperatures with the help of the hot electron effect, using symmetric normal metal-insulator-superconductor tunnel junction pairs as thermometers. By Joule h
Externí odkaz:
http://arxiv.org/abs/cond-mat/0410281
Publikováno v:
Phys. Rev. B 72, 012302 (2005)
We have used symmetric normal metal-insulator-superconductor (NIS) tunnel junction pairs, known as SINIS structures, for ultrasensitive thermometry in the temperature range 50 - 700 mK. By Joule heating the electron gas and measuring the electron tem
Externí odkaz:
http://arxiv.org/abs/cond-mat/0311031
We have investigated one and two dimensional (1D and 2D) arrays of tunnel junctions in partial Coulomb blockade regime. The absolute accuracy of the Coulomb blockade thermometer is influenced by the external impedance of the array, which is not the s
Externí odkaz:
http://arxiv.org/abs/cond-mat/9910126
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