Europhys. Lett.
Volume 75, Number 5, September 2006
Page(s) 791 - 796
Section Condensed matter: electronic structure, electrical, magnetic, and optical properties
Published online 21 July 2006
Europhys. Lett., 75 (5), pp. 791-796 (2006)
DOI: 10.1209/epl/i2006-10169-6

Fast-projectile stopping power of two-dimensional strongly correlated electron liquids

D. Ballester, A. M. Fuentes and I. M. Tkachenko

Departament de Matemàtica Aplicada, Universitat Politècnica de València 46022 Valencia, Spain

received 19 June 2006; accepted 10 July 2006
published online 21 July 2006

We study the high-velocity-projectile limit of the polarizational contribution to the in-plane stopping power in a strongly coupled two-dimensional electron liquid. The dielectric formalism based on the method of moments is employed. The frequency moments of the loss function are calculated using the model Hamiltonian including the two-dimensional Coulomb interaction potential proportional to the inverse power of k. We prove that the leading term of the high-velocity asymptote, as in the random-phase approximation, is not affected by correlations.

73.20.Mf - Collective excitations (including excitons, polarons, plasmons and other charge-density excitations).
52.27.Gr - Strongly-coupled plasmas.
52.40.Mj - Particle beam interactions in plasmas.

© EDP Sciences 2006