Abstract
The distribution of electrons in two parallel two-dimensional electron sheets in close proximity at low temperatures is investigated. We find that due to the exchange interaction a symmetric structure may have a ground state in which all electrons are transferred to one of the sheets. This occurs if the separation between the two systems is sufficiently small and the two-dimensional electron gas density is sufficiently low. The exchange interaction consequently leads to a bistability with respect to electron population in the two-sheet system which may be useful for future electronic devices, such as memory elements.
Original language | English (US) |
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Pages (from-to) | 2165-2167 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 59 |
Issue number | 17 |
DOIs | |
State | Published - 1991 |
Externally published | Yes |