Real Space Imaging of Ballistic Carrier Propagation in Bi Single Crystals

Autor:	P. Wyder, J. Heil, M. Primke, K. U. Würz
Rok vydání:	1995
Předmět:	Materials science Condensed matter physics Phonon Excited state General Physics and Astronomy Fermi surface Electron Signal Single crystal Excitation Magnetic field
Zdroj:	Physical Review Letters. 74:146-149
ISSN:	1079-7114 0031-9007
Popis:	Carriers and phonons are excited in a small volume at the surface of a Bi single crystal by laser illumination. Their nearly ballistic propagation through the sample is studied at low temperature by real space imaging of the potential at the sample surfaces using a Cu point contact as probe electrode. A focusing of electrons due to the geometry of the Fermi surface and phonon focusing is observed. The application of a magnetic field allows the identification of the signal components. A theoretical model for the mechanism of carrier excitation and detection is proposed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aa243c6c8ffbcf5af828dff40910016b https://doi.org/10.1103/physrevlett.74.146 Zobrazit plný text záznamu