# Photoproduction of Long-Lived Holes and Electronic Processes in Intrinsic Electric Fields Seen through Photoinduced Absorption and Dichroism in Ca\_3Ga\_{2-x}Mn\_xGe\_3O\_{12} Garnets

Source: [Photoproduction of Long-Lived Holes and Electronic Processes in Intrinsic Electric Fields Seen through Photoinduced Absorption and Dichroism in Ca\_3Ga\_{2-x}Mn\_xGe\_3O\_{12} Garnets](<https://www.sota2.com/research/paper/68fa26192c2a3760193b6931>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T11:08:35.275Z

Authors: V. V. Eremenko, S. L. Gnatchenko, I. S. Kachur, V. G. Piryatinskaya, A. M. Ratner, M. B. Kosmyna, B. P. Nazarenko, V. M. Puzikov

Published: 2003-07-11T09:02:10.000Z

## Abstract

Long-lived photoinduced absorption and dichroism in the Ca\_3Ga\_{2-x}Mn\_xGe\_3O\_{12} garnets with x \< 0.06 were examined versus temperature and pumping intensity. Unusual features of the kinetics of photoinduced phenomena are indicative of the underlying electronic processes. The comparison with the case of Ca\_3Mn\_2Ge\_3O\_{12}, explored earlier by the authors, permits one to finally establish the main common mechanisms of photoinduced absorption and dichroism caused by random electric fields of photoproduced charges (hole polarons). The rate of their diffusion and relaxation through recombination is strongly influenced by the same fields, whose large statistical straggling is responsible for a broad continuous set of relaxation components (observed in the relaxation time range from 1 to about 1000 min). For Ca\_3Ga\_{2-x}Mn\_xGe\_3O\_{12}, the time and temperature dependences of photoinduced absorption and dichroism bear a strong imprint of structure imperfection increasing with x.

## Recorded benchmark results

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/cond-mat/0307273>)

[PDF](<https://arxiv.org/pdf/cond-mat/0307273.pdf>)