Abstract
Phonon emission from two-dimensional electron gases of a Si MOSFET in high magnetic field is measured using the phonon-induced conductivity of the substrate. The inherent phonon energy-detection threshold of this system was used to analyse the phonon-frequency spectra. It is found that phonons of cyclotron energy are emitted, but only if the sample is in the quantum Hall effect state. The emission takes place in the corners where the current enters and exits the Hall bar sample. The cyclotron-phonon emission shows irregularities as a function of current which are not visible in standard conductivity experiments. These are attributed to a partial shift of the dissipation from the 2DEG into the contacts.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
