Vertex-Correction-Driven Intersubband Spin-Density Excitonic Instability in Double Quantum Well Structures

S. Das Sarma and P. I. Tamborenea
Phys. Rev. Lett. 73, 1971 – Published 3 October 1994
PDFExport Citation

Abstract

We show that exchange-correlation induced many-body excitonic vertex correction may lead to an instability in the normal ground state of a semiconductor double quantum well structure by suppressing the symmetric-antisymmetric intersubband gap at low but accessible (Å 0.7 × 1011 cm2) electron densities. We predict as a consequence a novel electronic phase transition where the lowest intersubband spin-density-excitation gap vanishes giving rise to a new many-body triplet excitonic liquid ground state which is more stable at low densities than the usual two dimensional Fermi liquid phase.

  • Received 15 March 1994

DOI:https://doi.org/10.1103/PhysRevLett.73.1971

©1994 American Physical Society

Authors & Affiliations

S. Das Sarma and P. I. Tamborenea

  • Department of Physics, University of Maryland, College Park, Maryland 20742-4111

References (Subscription Required)

Click to Expand
Issue

Vol. 73, Iss. 14 — 3 October 1994

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×