Volume 58, Number 4, May 2002
|Page(s)||555 - 561|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 May 2002|
Raman signatures of classical and quantum phases in coupled dots: A theoretical prediction
INFM and Dipartimento di Fisica,
Università degli Studi di Modena e Reggio Emilia
via Campi 213/A, 41100 Modena, Italy
Corresponding author: firstname.lastname@example.org
Accepted: 21 February 2002
We study electron molecules in realistic vertically coupled quantum dots in a strong magnetic field. Computing the energy spectrum, pair correlation functions, and dynamical form factor as a function of inter-dot coupling via diagonalization of the many-body Hamiltonian, we identify structural transitions between different phases, some of which do not have a classical counterpart. The calculated Raman cross-section shows how such phases can be experimentally singled out.
PACS: 73.21.La – Quantum dots / 73.20.Qt – Electron solids / 73.43.Nq – Quantum phase transitions
© EDP Sciences, 2002
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