Zhao, Y. G. ; Li, J. J. ; Shreekala, R. ; Drew, H. D. ; Chen, C. L. ; Cao, W. L. ; Lee, C. H. ; Rajeswari, M. ; Ogale, S. B. ; Ramesh, R. ; Baskaran, G. ; Venkatesan, T. (1998) Ultrafast laser induced conductive and resistive transients in La0.7Ca0.3MnO3: charge transfer and relaxation dynamics Physical Review Letters, 81 (6). pp. 1310-1313. ISSN 0031-9007
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Official URL: http://prl.aps.org/abstract/PRL/v81/i6/p1310_1
Related URL: http://dx.doi.org/10.1103/PhysRevLett.81.1310
Abstract
Pulsed laser excitation induced conductance changes in colossal magnetoresistance material La0.7Ca0.3MnO3 were studied on the picosecond time scale. A two-component signal was seen consisting of a fast positive transient associated with the paramagnetic insulating state and a slower negative signal associated with the ferromagnetic metallic state. The fast component corresponds to the photoionization of the Jahn-Teller small polaron. The slow component is explained in terms of the reduced carrier mobility due to photogenerated magnetic excitations.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Physical Society. |
| ID Code: | 26886 |
| Deposited On: | 08 Dec 2010 13:02 |
| Last Modified: | 13 Jul 2012 11:40 |
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