Orbital and Charge-Resolved Polaron States in CdSe Dots and Rods Probed by Scanning Tunneling Spectroscopy

Zhixiang Sun; Ingmar Swart; Christophe Delerue; Daniel Vanmaekelbergh; Peter Liljeroth

doi:10.1103/PhysRevLett.102.196401

Orbital and Charge-Resolved Polaron States in CdSe Dots and Rods Probed by Scanning Tunneling Spectroscopy

Zhixiang Sun^*, Ingmar Swart, Christophe Delerue, Daniel Vanmaekelbergh, Peter Liljeroth

^*Corresponding author for this work

Utrecht University

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

Conduction electrons interact with lattice vibrations, leading to coupled electron-phonon states. This effect is of fundamental importance in understanding electron transport and energy relaxation in nanoscale systems. We report quantitative results on the electron-phonon coupling strength in CdSe quantum dots (QDs) and rods, obtained by low-temperature scanning tunneling microscopy. We resolve the polaron eigenstates arising from coupling of the electrons to longitudinal optical phonons. The electron-phonon coupling strength is dependent on the electron orbital symmetry, the number of added electrons, and the size and dielectric environment of the QD.

Original language	English
Article number	196401
Number of pages	4
Journal	Physical Review Letters
Volume	102
Issue number	19
DOIs	https://doi.org/10.1103/PhysRevLett.102.196401
Publication status	Published - 15 May 2009

Funding

We thank Rolf Koole for providing the nanorod samples used in this study. This research was supported by the EU (ITN "HERODOT'') and NWO (Chemical Sciences, Vidigrant grant No. 700.56.423).

Keywords

NANOCRYSTAL QUANTUM DOTS
SOLIDS

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10.1103/PhysRevLett.102.196401

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title = "Orbital and Charge-Resolved Polaron States in CdSe Dots and Rods Probed by Scanning Tunneling Spectroscopy",

abstract = "Conduction electrons interact with lattice vibrations, leading to coupled electron-phonon states. This effect is of fundamental importance in understanding electron transport and energy relaxation in nanoscale systems. We report quantitative results on the electron-phonon coupling strength in CdSe quantum dots (QDs) and rods, obtained by low-temperature scanning tunneling microscopy. We resolve the polaron eigenstates arising from coupling of the electrons to longitudinal optical phonons. The electron-phonon coupling strength is dependent on the electron orbital symmetry, the number of added electrons, and the size and dielectric environment of the QD.",

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AU - Sun, Zhixiang

AU - Swart, Ingmar

AU - Delerue, Christophe

AU - Vanmaekelbergh, Daniel

AU - Liljeroth, Peter

PY - 2009/5/15

Y1 - 2009/5/15

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AB - Conduction electrons interact with lattice vibrations, leading to coupled electron-phonon states. This effect is of fundamental importance in understanding electron transport and energy relaxation in nanoscale systems. We report quantitative results on the electron-phonon coupling strength in CdSe quantum dots (QDs) and rods, obtained by low-temperature scanning tunneling microscopy. We resolve the polaron eigenstates arising from coupling of the electrons to longitudinal optical phonons. The electron-phonon coupling strength is dependent on the electron orbital symmetry, the number of added electrons, and the size and dielectric environment of the QD.

KW - NANOCRYSTAL QUANTUM DOTS

KW - SOLIDS

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DO - 10.1103/PhysRevLett.102.196401

M3 - Article

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JO - Physical Review Letters

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ER -

Orbital and Charge-Resolved Polaron States in CdSe Dots and Rods Probed by Scanning Tunneling Spectroscopy

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Keywords

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