Phase Diagram of Degenerate Exciton Systems-Reference-Cited by-同舟云学术

Phase Diagram of Degenerate Exciton Systems

Published:2004-01-23 Issue:5657 Volume:303 Page:503-506
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Lai C. W.¹²³⁴,Zoch J.¹²³⁴,Gossard A. C.¹²³⁴,Chemla D. S.¹²³⁴

Affiliation:

1. Applied Science and Technology, University of California at Berkeley, Berkeley, CA 94720, USA.

2. Physics Department, University of California at Berkeley, Berkeley, CA 94720, USA.

3. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.

4. Department of Electrical and Computer Engineering, University of California at Santa Barbara, Santa Barbara, CA 93106, USA.

Abstract

Degenerate exciton systems have been produced in quasi–two-dimensional confined areas in semiconductor coupled quantum well structures. We observed contractions of clouds containing tens of thousands of excitons within areas as small as (10 μm) 2 near 10 kelvin. The spatial and energy distributions of optically active excitons were determined by measuring photoluminescence as a function of temperature and laser excitation and were used as thermodynamic quantities to construct the phase diagram of the exciton system, which demonstrates the existence of distinct phases. Understanding the formation mechanisms of these degenerate exciton systems can open new opportunities for the realization of Bose-Einstein condensation in the solid state.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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