Excitonic Instability and Gap Generation in Monolayer Graphene

• Date: 2010
• Main Authors: Gamayun, O.V., Gorbar, E.V., Gusyn, V.P.
• Format: Article
• Language: English
• Published: Відділення фізики і астрономії НАН України 2010
• Subjects: Наносистеми
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/13290
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Excitonic Instability and Gap Generation in Monolayer Graphene / O.V. Gamayun, E.V. Gorbar, V.P. Gusyn // Укр. фіз. журн. — 2010. — Т. 55, № 1. — С. 95-103. — Бібліогр.: 31 назв. — англ.

We analyze the excitonic instability in graphene by solving the Bethe–Salpeter equation for the electron-hole bound state. In the supercritical regime, we show that this equation has a tachyon in its spectrum. We argue that the excitonic instability is resolved through the formation of an electron-h...