Abstract
A two-dimensional low-density system of charge carriers with strong Coulomb interaction, which can lead to the appearance of a short-wavelength soft mode (precursor of crystallization) is examined. This system provides elementary excitations of two types: Fermi excitations and Bose excitations with a gap in the spectrum. The latter excitations are similar to rotons in superfluid helium. A model involving the Fermi liquid and the soft mode is proposed, and interaction of different excitations with each other is described phenomenologically as in the Landau theory of Fermi liquid. By solving the derived equations, it was found that, as the temperature increases, the effective mass of Fermi excitations decreases and the gap in the Bose excitation spectrum increases.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
S. V. Kravchenko et al., Phys. Rev. B 50, 8039 (1994); 51, 7038 (1995); Phys. Rev. Lett. 77, 4938 (1996).
Y. Hanein, U. Meirav, D. Shahar, et al., Phys. Rev. Lett. 80, 1288 (1998).
S. J. Papadakis and M. Shayegan, Phys. Rev. B 57, R15068 (1998).
Jongsoo Yoon, C. C. Li, D. C. Tsui, and M. Shayegan, Phys. Rev. Lett. 84, 4421 (2000).
S. C. Dultz and H. W. Jiang, Phys. Rev. Lett. 84, 4689 (2000).
V. Senz, T. Ihn, T. Heinzel, et al., Phys. Rev. Lett. 85, 4357 (2000).
L. Moldovan, S. Melinte, V. Bayot, et al., Phys. Rev. Lett. 85, 4369 (2000).
E. Abrahams, S. V. Kravchenko, and M. P. Sarachik, Rev. Mod. Phys. 73, 251 (2001).
V. M. Pudalov, Pis’ma Zh. Éksp. Teor. Fiz. 66, 168 (1997) [JETP Lett. 66, 175 (1997)].
B. L. Altshuler and D. L. Maslov, Phys. Rev. Lett. 82, 145 (1999).
É. G. Batyev, Pis’ma Zh. Éksp. Teor. Fiz. 72, 727 (2000) [JETP Lett. 72, 506 (2000)].
É. G. Batyev and L. S. Braginsky, Zh. Éksp. Teor. Fiz. 87, 1361 (1984) [Sov. Phys. JETP 60, 781 (1984)].
É. G. Batyev, Zh. Éksp. Teor. Fiz. 70, 578 (1976) [Sov. Phys. JETP 43, 300 (1976)].
A. M. Dyugaev, Zh. Éksp. Teor. Fiz. 70, 2390 (1976) [Sov. Phys. JETP 43, 1247 (1976)].
B. Spivak, cond-mat/0005328.
Author information
Authors and Affiliations
Additional information
__________
Translated from Pis’ma v Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 73, No. 10, 2001, pp. 635–639.
Original Russian Text Copyright © 2001 by Batyev.