Oscillations in double-quantum-well structures

Autor:	K W H Stevens, C L Foden
Rok vydání:	1990
Předmět:	Physics Oscillation Wave packet Electron Inelastic scattering Condensed Matter Physics Schrödinger equation symbols.namesake Quantum mechanics symbols General Materials Science Atomic physics Computer Science::Databases Quantum tunnelling Excitation Coherence (physics)
Zdroj:	Journal of Physics: Condensed Matter. 2:5179-5190
ISSN:	1361-648X 0953-8984
Popis:	The energy levels of a double-quantum-well system can be expected to occur in closely spaced pairs, due to 'tunnelling', so raising the possibility that oscillations can occur at the tunnelling frequencies. This paper gives a detailed theory of the excitation of such a pair by an incident electron wavepacket, using a time-dependent formalism and a one-dimensional system of barriers. It is confirmed that transient oscillations can be expected to occur in currents and charge densities near quasi-resonances. It is further reasoned that to increase the temporal coherence of an incident pulse, it is desirable to have inelastic scattering into a quasi-bound state.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2f8f26538f9bb1276dd1fccbb1d36caa https://doi.org/10.1088/0953-8984/2/23/008 Zobrazit plný text záznamu