Evidence of Soft-Mode Quantum Phase Transitions in Electron Double Layers-Reference-Cited by-同舟云学术

Evidence of Soft-Mode Quantum Phase Transitions in Electron Double Layers

Published:1998-08-07 Issue:5378 Volume:281 Page:799-802
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Pellegrini Vittorio¹,Pinczuk Aron¹,Dennis Brian S.¹,Plaut Annette S.¹,Pfeiffer Loren N.¹,West Ken W.¹

Affiliation:

1. V. Pellegrini, Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974, USA, and Scuola Normale Superiore and Istituto Nazionale per la Fisica della Materia, Pisa, Italy. A. Pinczuk, Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974, USA, and Departments of Physics and Applied Physics, Columbia University, New York, NY 10027, USA. B. S. Dennis, L. N. Pfeiffer, K. W. West, Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974, USA. A. S. Plaut, Department of Physics,...

Abstract

Inelastic light scattering by low-energy spin-excitations reveals three distinct configurations of spin of electron double layers in gallium arsenide quantum wells at even-integer quantum Hall states. The transformations among these spin states appear as quantum phase transitions driven by the interplay between Coulomb interactions and Zeeman splittings. One of the transformations correlates with the emergence of a spin-flip intersubband excitation at vanishingly low energy and provides direct evidence of a link between quantum phase transitions and soft collective excitations in a two-dimensional electron system.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference29 articles.

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3. S. Das Sarma and A. Pinczuk Eds. Perspectives in Quantum Hall Effects (Wiley New York 1996).

4. Moon K., et al., Phys. Rev. B 51, 5138 (1995).

5. J. P. Eisenstein in (3) pp. 37–70.

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