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Ground state energy of the electron–hole liquid in type-II quantum wells

✍ Scribed by Akira Inagaki; Shin'ichi Katayama

Publisher
Institute of Physics and National Institute of Materials Science
Year
2003
Tongue
English
Weight
113 KB
Volume
4
Category
Article
ISSN
1468-6996

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✦ Synopsis

We present the ground state energy calculation of quasi-two-dimensional electron -hole liquid (EHL) at zero temperature in type-II quantum wells (QWs). The correlation energy is evaluated by random phase approximation of Hubbard. The effects of spatial separation of electrons and holes on the stability of EHL are explored by changing the distance between the QWs, taking extent of wave functions into account. Our calculated ground state energy of EHL for type-II ðGaAsÞ 10 =ðAlAsÞ 10 QWs is lower than the binding energy of exciton calculated recently so that it is expected that EHL should be more stable than exciton in type-II ðGaAsÞ 10 =ðAlAsÞ 10 QWs.

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✍ Min Cai; Youyan Liu; Wenming Liu; Tongjun Yu 📂 Article 📅 1992 🏛 Elsevier Science 🌐 English ⚖ 383 KB

The binding energy of the ground-state exciton in type-II quantum well structures, staggered and misaligned configurations, is calculated with a variational method. The resulting binding energy in the InAs/GaSb structure for the zero field case is much larger than that reported previously by other a