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Title:
High-pressure study of picosecond exciton dynamics in solid C60
Authors:
Hess, Bret C.; Forgy, Eric A.; Frolov, Sergey; Dick, David D.; Vardeny, Zeev V.
Affiliation:
AA(Physics Department, California State University-Fresno, Fresno, California 93740) AB(Physics Department, California State University-Fresno, Fresno, California 93740) AC(Physics Department, University of Utah, Salt Lake City, Utah 84112) AD(Physics Department, University of Utah, Salt Lake City, Utah 84112) AE(Physics Department, University of Utah, Salt Lake City, Utah 84112)
Publication:
Physical Review B (Condensed Matter), Volume 50, Issue 7, August 15, 1994, pp.4871-4874 (PhRvB Homepage)
Publication Date:
08/1994
Origin:
AIP; APS
PACS Keywords:
Time-resolved optical spectroscopies and other ultrafast optical measurements in condensed matter, High-pressure and shock wave effects in solids and liquids
Abstract Copyright:
(c) 1994: The American Physical Society
DOI:
10.1103/PhysRevB.50.4871
Bibliographic Code:
1994PhRvB..50.4871H

Abstract

We have studied the singlet exciton decay by picosecond photoinduced absorption in films of C60, under pressures up to 62 kbar. The picosecond decay of excitons excited in the absorption tail continues to be dominated by broad distributions of lifetimes at high pressure. These results suggest that the distributions of lifetimes do not arise from variations in tunneling or hopping rates between C60 molecules as was originally suggested, but arise from distributions of recombination rates at different sites in the sample.
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