Мобильная версия

Доступно журналов:

3 288

Доступно статей:

3 891 637


Скрыть метаданые

Автор C J Mellor
Дата выпуска 1999-10-11
dc.description The results of ballistic phonon and microwave absorption experiments are presented in the fractional quantum Hall regime of two-dimensional electron and hole systems respectively. Time-resolved ballistic phonon results suggest that acoustic phonons can be absorbed by the magnetoroton excitations of a fractional quantum Hall fluid. The technique allows the determination of the magnetoroton gap and holds out the promise of being able to measure the magnetoroton dispersion curve in angle-resolved experiments. At lower Landau level filling factors, high-mobility two-dimensional systems become insulating. Microwave absorption experiments at finite wavevector find a series of sharp absorption lines in the insulating phase that become more pronounced as the temperature is lowered and the magnetic field increased. The results strongly suggest that the two-dimensional system forms a pinned Wigner solid at these low filling factors. Further analysis allows the determination of the pinning frequency and its variation as a function of magnetic field.
Формат application.pdf
Издатель Institute of Physics Publishing
Название Finite-wavevector studies of two-dimensional systems
Тип paper
DOI 10.1088/0953-8984/11/40/305
Electronic ISSN 1361-648X
Print ISSN 0953-8984
Журнал Journal of Physics: Condensed Matter
Том 11
Первая страница 7723
Последняя страница 7736
Аффилиация C J Mellor; School of Physics and Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD, UK
Выпуск 40

Скрыть метаданые