تقرير
Effects of electron-phonon interactions on the electron tunneling spectrum of PbS quantum dots
| العنوان: | Effects of electron-phonon interactions on the electron tunneling spectrum of PbS quantum dots |
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| المؤلفون: | Wang, H., Lhuillier, E., Yu, Q., Mottaghizadeh, A., Ulysse, C., Zimmers, A., Descamps-Mandine, A., Dubertret, B., Aubin, H. |
| المصدر: | Phys. Rev. B 92, 041403 (2015) |
| سنة النشر: | 2015 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics |
| الوصف: | We present a tunnel spectroscopy study of single PbS Quantum Dots (QDs) as function of temperature and gate voltage. Three distinct signatures of strong electron-phonon coupling are observed in the Electron Tunneling Spectrum (ETS) of these QDs. In the shell-filling regime, the $8\times$ degeneracy of the electronic levels is lifted by the Coulomb interactions and allows the observation of phonon sub-bands that result from the emission of optical phonons. At low bias, a gap is observed in the ETS that cannot be closed with the gate voltage, which is a distinguishing feature of the Franck-Condon (FC) blockade. From the data, a Huang-Rhys factor in the range $S\sim 1.7 - 2.5$ is obtained. Finally, in the shell tunneling regime, the optical phonons appear in the inelastic ETS $d^2I/dV^2$. Comment: 5 pages, 5 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.92.041403 |
| URL الوصول: | http://arxiv.org/abs/1509.02867 |
| رقم الأكسشن: | edsarx.1509.02867 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.92.041403 |
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