Objective
The research has led to the development of magnetotunnelling spectroscopy as a probe of the complicated energy versus momentum dispersion curves of bound hole states in the valence band quantum well. It has been applied to the measurement of the hole dispersion curves in aluminium arsenic/gallium arsenic/aluminium arsenic quantum wells. Briefly, the technique works as follows. A magnetic field is applied parallel to the barriers. The effect of the magnetic field is to shift the voltage positions of the peaks in the current voltage characteristics by an amount given by the form of the hole dispersion curve. Thus the magnetic field and the applied voltage allow us sweep through different values of K(parallel), the in plane momentum of the tunnelling holes, and energy for the quantum well states. In this way, we are able to measure directly the negative effective mass behaviour and light heavy hole mixing of the valence band quantum well states.
We have used the technique to measure the hole dispersion curves for a valence band quantum well grown on a (311)A surface. This plane is highly asymmetric and the resonant magnetotunnelling spectroscopy (RMTS) technique has revealed clearly the remarkable and complex form of the valence band states.
NEANT
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- natural sciences chemical sciences inorganic chemistry post-transition metals
- natural sciences physical sciences optics spectroscopy
You need to log in or register to use this function
We are sorry... an unexpected error occurred during execution.
You need to be authenticated. Your session might have expired.
Thank you for your feedback. You will soon receive an email to confirm the submission. If you have selected to be notified about the reporting status, you will also be contacted when the reporting status will change.
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Data not available
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Data not available
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
38042 GRENOBLE
France
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.