Details
| Original language | English |
|---|---|
| Pages (from-to) | 817-822 |
| Number of pages | 6 |
| Journal | European journal of mineralogy |
| Volume | 24 |
| Issue number | 5 |
| Early online date | 1 Feb 2012 |
| Publication status | Published - 26 Sept 2012 |
Abstract
Temperature-dependent absorption investigations between 10 and 823 K reveal photon-assisted hopping (PAH) of small polarons in biotites as the dominating excitation in the near-infrared spectral range. These data show a transfer of oscillator strength of the PAH of small polarons to Fe2+-Fe 3+ intervalence-charge transfer and Fe2+ d-d transitions with decreasing temperature. The loss in oscillator strength of PAH is related to a pinning of the polarons due to the decreasing number in lattice vibrations in thermal equilibrium.
Keywords
- Biotite, Intervalence-charge transfer, Small-polaron absorption
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geochemistry and Petrology
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In: European journal of mineralogy, Vol. 24, No. 5, 26.09.2012, p. 817-822.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Temperature-dependent absorption of biotite
T2 - Small-polaron hopping and other fundamental electronic excitations
AU - Rüscher, Claus H.
PY - 2012/9/26
Y1 - 2012/9/26
N2 - Temperature-dependent absorption investigations between 10 and 823 K reveal photon-assisted hopping (PAH) of small polarons in biotites as the dominating excitation in the near-infrared spectral range. These data show a transfer of oscillator strength of the PAH of small polarons to Fe2+-Fe 3+ intervalence-charge transfer and Fe2+ d-d transitions with decreasing temperature. The loss in oscillator strength of PAH is related to a pinning of the polarons due to the decreasing number in lattice vibrations in thermal equilibrium.
AB - Temperature-dependent absorption investigations between 10 and 823 K reveal photon-assisted hopping (PAH) of small polarons in biotites as the dominating excitation in the near-infrared spectral range. These data show a transfer of oscillator strength of the PAH of small polarons to Fe2+-Fe 3+ intervalence-charge transfer and Fe2+ d-d transitions with decreasing temperature. The loss in oscillator strength of PAH is related to a pinning of the polarons due to the decreasing number in lattice vibrations in thermal equilibrium.
KW - Biotite
KW - Intervalence-charge transfer
KW - Small-polaron absorption
UR - http://www.scopus.com/inward/record.url?scp=84874627105&partnerID=8YFLogxK
U2 - 10.1127/0935-1221/2012/0024-2200
DO - 10.1127/0935-1221/2012/0024-2200
M3 - Article
AN - SCOPUS:84874627105
VL - 24
SP - 817
EP - 822
JO - European journal of mineralogy
JF - European journal of mineralogy
SN - 0935-1221
IS - 5
ER -