The instability of 2D electron gas at high density

The edge-energy of a 2D electron gas with high density is calculated, where the edge-energy implies the energy which is needed to form a unit length of a new edge when a 2D infinite homogeneous electron sheet is cleft into two pieces of semi-infinite sheets. It is found that, when r s < 0.415, th...

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Bibliographic Details
Published in:Surface science 1986-04, Vol.170 (1), p.422-425
Main Authors: Sun, Xin, Xie, Han-kun, Zhou, Shi-xun
Format: Article
Language:English
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Summary:The edge-energy of a 2D electron gas with high density is calculated, where the edge-energy implies the energy which is needed to form a unit length of a new edge when a 2D infinite homogeneous electron sheet is cleft into two pieces of semi-infinite sheets. It is found that, when r s < 0.415, the edge-energy becomes negative. It indicates that at high enough density the 2D homogeneous electron gas will be unstable and some kind of CDW appears.
ISSN:0039-6028
1879-2758
DOI:10.1016/0039-6028(86)90998-2