New low density phase of interacting electrons: The paired electron crystal
- 26 October 1992
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 69 (17) , 2555-2558
- https://doi.org/10.1103/physrevlett.69.2555
Abstract
A variational method shows that for a range of densities the compensated low density interacting electron system possesses a ground-state crystalline phase with L=0 spin-singlet pairs and with an energy lower than the Wigner crystal. The physical origin of the additional binding is intrapair exchange resulting from wave-function overlap and cooperative anharmonic behavior.Keywords
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