Abstract
The “phase diagram” of a two-dimensional mesoscopic system of bosons is investigated. An example of such a system is a system of indirect magnetoexcitons in semiconductor double quantum dots. Quantum Monte Carlo calculations show the existence of quantum orientational melting. At zero (quite low) temperature, as quantum fluctuations of the particles intensify, two quantum disordering phenomena occur with increasing de Boer parameter q. First, at q≈10−3 the system passes to a radially ordered but orientationally disordered state, where different shells of a cluster rotate relative to one another. Then at q≈0.16 a transition to a superfluid state occurs.
Similar content being viewed by others
References
Proceedings of the Conference on Mesoscopic and Strongly-Correlated Electronic Systems, Chernogolovka-97, Usp. Fiz. Nauk 168, No. 2 (1998).
R. C. Ashoori et al., Phys. Rev. Lett. 68, 3088 (1992); 71, 613 (1993).
A. I. Andreev, Usp. Fiz. Nauk 168, 655 (1998).
Yu. E. Lozovik, Usp. Fiz. Nauk 153, 356 (1987) [Sov. Phys. Usp. 30, 912 (1987)]; Yu. E. Lozovik and V. A. Mandelshtam, Phys. Lett. A 145, 269 (1990); 165, 469 (1992).
V. M. Bedanov and F. M. Peeters, Phys. Rev. B 49, 2662 (1994); V. Schweigert and F. M. Peeters, Phys. Rev. B 51, 7700 (1995); I. V. Schweigert, V. A. Schweigert, and F. M. Peeters, Phys. Rev. B 54, 10827 (1996).
Yu. E. Lozovik and E. A. Rakoch, Phys. Lett. A 235, 55 (1997); Yu. E. Lozovik and E. A. Rakoch, Phys. Rev. B 57, 1214 (1998).
A. I. Belousov and Yu. E. Lozovik, http://xxx.lanl.gov/abs/cond-mat/9803300.
D. Ceperley, Rev. Mod. Phys. 67, 279 (1995).
Yu. E. Lozovik, S. A. Verzakov, and M. Willander, Phys. Rev. B, to be published.
P. Nordborg and J. Blatter, Phys. Rev. Lett. 79, 1925 (1997).
A. Zrenner et al., Phys. Rev. Lett. 72, 3383 (1994); L. V. Butov et al., Phys. Rev. B 52, 12153 (1995); V. F. Timofeev et al., Phys. Rev. B., to be published.
Yu. E. Lozovik, O. L. Berman, and V. G. Tsvetus, JETP Lett. 66, 355 (1997).
Author information
Authors and Affiliations
Additional information
Pis’ma Zh. Éksp. Teor. Fiz. 68, No. 11, 817–822 (10 December 1998)