Abstract
The fundamental absorption edge of the gadolinium trihydride has been studied by performing optical transmission measurements at temperatures ranging from 298 K to 353 K. Urbach tails and the photon absorption spectra give information about the exciton dynamics, distinguishing between free and trapped excitons in the lattice. Our experimental results can be accounted for in terms of the theory of Toyozawa and co-workers, which ascribe the Urbach tail to the momentary localization of excitons due to phonon interaction.
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References
Urbach F (1953) Phys Rev 92:1324
Martienssen W (1957) J Phys Chem Solids 2:257
Wasim S, Rincon C, Marin G, Bocaranda P (2001) Phys Rev B 64:195101
Dow J, Redfield D (1971) Phys Rev B 5:594
Tang H, Levy F, Berger H, Schmid PE (1995) Phys Rev B 52:7771
Cho K, Toyozawa Y (1971) J Phys Soc Jpn 30:1555
Sumi H, Toyozawa Y (1971) J Phys Soc Jpn 31:342
Schreiber M, Toyozawa Y (1982) J Phys Soc Jpn 51:1528
Mohler E, Thomas B (1980) Phys Rev Lett 44:543
Schreiber M (1986) Phys Rev B 34:2914
Cody G, Tiedje T, Abeles B, Brooks B, Goldstein Y (1981) Phys Rev Lett 47:1480
Wang Y, Chou M (1995) Phys Rev B 51:7500
Noba K, Kayanuma Y (1999) Phys Rev B 60:4418
Acknowledgements
We gratefully acknowledge the financial support of the German Research Foundation (DFG) in the Research Training Group, New high performance materials for efficient energy usage (Neue Hochleistungswerkstoffe für effiziente Energienutzung).
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Shalaan, E., Schmitt, H. Urbach tail of gadolinium trihydride films. J Mater Sci 42, 3255–3258 (2007). https://doi.org/10.1007/s10853-006-0237-y
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DOI: https://doi.org/10.1007/s10853-006-0237-y