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Spectroscopy of soft modes and quantum phase transitions in coupled electron bilayers

✍ Scribed by S. Luin; I. Dujovne; V. Pellegrini; A. Pinczuk; B.S. Dennis; A.S. Plaut; L.N. Pfeiffer; K.W. West; J.H. Xu

Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
245 KB
Volume
127
Category
Article
ISSN
0038-1098

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✦ Synopsis

Strongly correlated two-dimensional electrons in coupled semiconductor bilayers display remarkable broken symmetry many-body states under accessible and controllable experimental conditions. In the case of continuous quantum phase transitions (QPTs), soft collective modes drive the transformations that link distinct ground states of the electron double layers. In this paper we consider results showing that resonant inelastic light scattering methods detect soft collective modes of the double layers and probe their evolution with temperature and magnetic field. The light scattering experiments offer venues of research of fundamental interactions and continuous QPTs in low-dimensional electron liquids.

πŸ“œ SIMILAR VOLUMES

Quantum phases of electron double layers
Quantum phases of electron double layers: soft collective modes and finite-temperature phase transitions
✍ Vittorio Pellegrini; Aron Pinczuk; Brian S Dennis; Loren N Pfeiffer; Ken W West πŸ“‚ Article πŸ“… 2000 πŸ› Elsevier Science 🌐 English βš– 96 KB

The extreme softening of spin excitations in electron double layers is studied by resonant inelastic light scattering. At even-integer quantum Hall states we ΓΏnd evidence of three distinct conΓΏgurations of spin. Transformations among these spin states appear as quantum phase transitions tuned by int