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Phonon assisted resonant tunneling and its phonons control |
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| Authors: | F V Kusmartsev V D Krevchik M B Semenov D O Filatov A V Shorokhov A A Bukharaev Y Dakhnovsky A V Nikolaev N A Pyataev R V Zaytsev P V Krevchik I A Egorov K Yamamoto A K Aringazin |
| Institution: | 1.Department of Physics,Loughborough University,Loughborough,UK;2.Department of Physics,Penza State University,Penza,Russia;3.Lobachevsky State University of Nizhny Novgorod,Nizhny Novgorod,Russia;4.Mordovia State University,Saransk,Russia;5.Zavoisky Institute for Physics and Technology, Kazan Scientific Center,Russian Academy of Science,Kazan,Russia;6.Kazan Federal University,Kazan,Russia;7.Department of Physics and Astronomy,University of Wyoming,Laramie,USA;8.Skobeltsyn Institute of Nuclear Physics,Moscow State University,Moscow,Russia;9.Moscow Institute of Physics and Technology (State University),Dolgoprudnyi, Moscow region,Russia;10.Research Institute,International Medical Center,Tokyo,Japan;11.Institute for Basic Research,Eurasian National University,Astana,Kazakhstan |
| Abstract: | We observe a series of sharp resonant features in the tunneling differential conductance of InAs quantum dots. We found that dissipative quantum tunneling has a strong influence on the operation of nanodevices. Because of such tunneling the current–voltage characteristics of tunnel contact created between atomic force microscope tip and a surface of InAs/GaAs quantum dots display many interesting peaks. We found that the number, position, and heights of these peaks are associated with the phonon modes involved. To describe the found effect we use a quasi-classical approximation. There the tunneling current is related to a creation of a dilute instanton–anti-instanton gas. Our experimental data are well described with exactly solvable model where one charged particle is weakly interacting with two promoting phonon modes associated with external medium. We conclude that the characteristics of the tunnel nanoelectronic devices can thus be controlled by a proper choice of phonons existing in materials, which are involved. |
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