Actas de congresos
Statistical Mechanics Of Screened Spatially Indirect Excitons
Registro en:
Physica Status Solidi (a) Applied Research. , v. 190, n. 3, p. 655 - 660, 2002.
318965
10.1002/1521-396X(200204)190:3<655::AID-PSSA655>3.0.CO;2-7
2-s2.0-0036542577
Autor
Brasil M.J.S.P.
Luyo S.J.
De Carvalho Jr. W.
Bernussi A.A.
Vasconcellos A.R.
Luzzi R.
Institución
Resumen
We study thermodynamic properties of spatially separated electron-hole plasma in double-layered systems using the Green function formalism. The screening of the Coulomb interaction is considered in the framework of Thomas-Fermi approximation, and a qualitatively new mechanism of screening by indirect excitons is taken into account. The exciton density is shown to decrease sharply with increasing electron-hole separation up to one exciton Bohr radius. The strong mutual enhancement of screening and charge-separation effects is found. 190 3 655 660 Lozovik, Y.E., Bergman, O.L., (1997) Sov. Phys. - JETP, 111, p. 1879. , and references therein Bigenwald, P., Kavokin, A., Gil, B., Lefebvre, P., (2001) Phys. Rev. B, 63, p. 035315. , and references therein Ando, T., Fowler, A.B., Stern, F., (1982) Rev. Mod. Phys., 54, p. 437 Averkiev, N.S., Pikus, G.E., Shmatov, M.L., (1989) Sov. Phys. - Solid State, 30, p. 1884 Mahan, G.D., (1990) Many-Particle Physics, , Plenum Press, New York and London Zimmermann, R., Stolz, H., (1985) Phys. Stat. Sol. (B), 131, p. 151 Zimmermann, R., (1987) Many-Particle Theory of Highly Excited Semiconductors, , Teubner, Leipzig Portnoi, M.E., Galbraith, I., (1999) Phys. Rev. B, 60, p. 5570 Campi, D., Coli, G., Vallone, M., (1998) Phys. Rev. B, 57, p. 4681