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Journal article

Diffusion, localization, and dephasing of trions and excitons in CdTe quantum wells

Excitons and trions in a CdTe modulation-doped quantum well are investigated by picosecond three-pulse four-wave mixing experiments as a function of temperature in the low-density regime. We show that trions are mobile for high enough temperatures. The diffusivity of trions and excitons increases with temperature but, like their mobilities, is limited by acoustic-phonon scattering. Consistently, studying the decay of the interband coherence reveals an increase of the homogeneous broadening as the temperature is raised. At low temperatures, excitonic complexes are localized by both interface roughness scattering and by the electrostatic potential due to remote ionized donors.

    Keywords: NEGATIVELY CHARGED EXCITONS ; ELECTRON-GAS ; MOBILITY ; SPECTROSCOPY ; TRANSPORT

    Note:

    Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol, Inst Quantum Elect & Photon, CH-1015 Lausanne, Switzerland. Univ Lausanne, Inst Phys Matiere Condensee, Fac Sci, BSP, CH-1015 Lausanne, Switzerland. Warsaw Univ, Inst Phys Expt, PL-00681 Warsaw, Poland. Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland. Portella-Oberli, MT, Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol, Inst Quantum Elect & Photon, CH-1015 Lausanne, Switzerland.

    ISI Document Delivery No.: 612MV

    Times Cited: 4

    Cited Reference Count: 27

    Cited References:

    1987, LANDOLTBORNSTEIN A, V22, P213

    ANDREANI LC, 1991, SOLID STATE COMMUN, V77, P641

    BASU PK, 1991, PHYS REV B, V44, P1844

    BRINKMANN D, 1999, PHYS REV B, V60, P4474

    CITRIN DS, 1993, PHYS REV B, V47, P3832

    CIULIN V, 2000, PHYS REV B, V62, P16310

    CIULIN V, 2001, PHYS STATUS SOLIDI B, V227, P307

    EYTAN G, 1998, PHYS REV LETT, V81, P1666

    FINKELSTEIN G, 1995, PHYS REV LETT, V74, P976

    HCMELA DS, 1984, J OPT SOC AM B, V2, P1155

    HILLMER H, 1989, PHYS REV B, V39, P10901

    HOPFEL RA, 1986, APPL PHYS LETT, V49, P572

    INTONTI F, 2001, PHYS REV LETT, V87

    KENG K, 1993, PHYS REV LETT, V71, P1752

    LAMPERT MA, 1958, PHYS REV LETT, V1, P450

    MUKAMEL S, 1995, PRINCIPLES NONLINEAR

    PERRIN F, 1934, J PHYS RADIUM, V5, P33

    PORTELLAOBERLI MT, UNPUB

    PULIZZI F, 2001, PHYSICA B, V298, P397

    RAPAPORT R, 2001, PHYS STATUS SOLIDI B, V227, P419

    RON, 1996, SOLID STATE COMMUN, V97, P741

    SALCEDO JR, 1978, PHYS REV LETT, V41, P131

    SANVITTO D, 2001, SCIENCE, V294, P837

    SIVINIANT J, 1999, PHYS REV B, V59, P1602

    WEINER AM, 1985, J OPT SOC AM B, V2, P654

    WOJTOWICZ T, 1998, APPL PHYS LETT, V73, P1379

    ZIMMERMANN R, 1997, PURE APPL CHEM, V69, P1179

    155305

    Reference

    Record created on 2007-08-31, modified on 2016-08-08

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