Autor: Utko, P. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: An Improved 2.5 GHz Electron Pump: Single-Electron Transport through Shallow-Etched Point Contacts Driven by Surface Acoustic Waves
Autorzy:: Utko, P.
Gloos, K.
Hansen, J. B.
Lindelof, P. E.
Powiązania:: https://bibliotekanauki.pl/articles/2035753.pdf
Data publikacji:: 2003-06
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 73.63.Kv
72.50.+b
06.20.Jr
Opis:: We present an experimental study of a 2.5 GHz electron pump based on the quantized acoustoelectric current driven by surface acoustic waves through a shallow-etched point contact in a GaAs/AlGaAs heterostructure. At low temperatures and with an additional counter-propagating surface acoustic waves beam, up to n=20 current plateaus at I=nef could be resolved, where n is an integer, e the electron charge, and f the surface acoustic waves frequency. In the best case the accuracy of the first plateau at 0.40 nA was estimated to beΔ I/I=±25 ppm over 0.25 mV in gate voltage, which is better than previous results.
Źródło:: Acta Physica Polonica A; 2003, 103, 6; 533-538
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Different Quantization Mechanisms in Single-Electron Pumps Driven by Surface Acoustic Waves
Autorzy:: Utko, P.
Gloos, K.
Bindslev Hansen, J.
Sørensen, C.
Lindelof, P.
Powiązania:: https://bibliotekanauki.pl/articles/2047039.pdf
Data publikacji:: 2006-09
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 73.23.-b
72.50.+b
73.21.La
Opis:: We have studied the acoustoelectric current in single-electron pumps driven by surface acoustic waves. We have found that in certain parameter ranges two different sets of quantized steps dominate the acoustoelectric current versus gate-voltage characteristics. In some cases, both types of quantized steps appear simultaneously though at different current values, as if they were superposed on each other. This could indicate two independent quantization mechanisms for the acoustoelectric current.
Źródło:: Acta Physica Polonica A; 2006, 110, 3; 403-408
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Coupling between Electronic and Vibrational Excitations in Carbon Nanotubes Filled with $C_{60}$ Fullerenes
Autorzy:: Utko, P.
Ferone, R.
Krive, I.
Shekhter, R.
Jonson, M.
Monthioux, M.
Noé, L.
Nygård, J.
Powiązania:: https://bibliotekanauki.pl/articles/1492807.pdf
Data publikacji:: 2011-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 73.63.Fg
73.63.Kv
73.23.Hk
73.22.Lp
71.38.-k
Opis:: We investigate the low-temperature electron transport through $C_{60}$ peapods, which are carbon nanotubes encapsulating $C_{60}$ fullerenes. We find that the temperature dependence of the Coulomb blockade oscillations in peapod quantum dots deviates from conventional Breit-Wigner behavior, showing signatures of the Franck-Condon blockade of conductance. This indicates the presence of a coupling between electronic states and vibrational excitations. Unlike for suspended empty nanotubes, these are not intrinsic vibrational modes of the tube but mechanical vibrations of the encapsulated fullerenes that affect the electronic transport. Fullerene peapods thus emerge as a new class of nanoelectromechanical systems.
Źródło:: Acta Physica Polonica A; 2011, 120, 5; 839-841
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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