Exciton Liquid in Coupled Quantum Wells

• Published in: Science (American Association for the Advancement of Science) Vol. 343; no. 6166; pp. 55 - 57
• Main Authors: Stern, Michael, Umansky, Vladimir, Bar-Joseph, Israel
• Format: Journal Article
• Language: English
• Published: United States American Association for the Advancement of Science 03.01.2014; The American Association for the Advancement of Science
• Subjects: Aluminum; Density; Electrical phases; Electrical resistivity; Electrons; Excitons; Gallium; Laser power; Line spectra; Liquids; Low temperature; Luminescence; Mesas; Photoluminescence; Power lines; Quantum physics; Quantum theory; Quantum wells; semiconductors; Studies; temperature; Wells

Excitons in semiconductors may form correlated phases at low temperatures. We report the observation of an exciton liquid in gallium arsenide/aluminum gallium arsenide–coupled quantum wells. Above a critical density and below a critical temperature, the photogenerated electrons and holes separate in...