Abstract
We show that the spin chain/ladder compound La3Sr3Ca8Cu24O41 is an insulator with hopping transport along the chains. In the temperature range 35–280 K, dc conductivity σdc(T) follows Mott’s law of variable-range hopping conduction; the frequency dependence has the form σ(ν, T) = σdc(T) + A(T)νs, where s ≈ 1. The conduction mechanism changes from variable-range hopping to nearest-neighbor hopping around Tc = 300 K. The chain array thus behaves as a one-dimensional disordered system. Disorder is due to random structural distortions of chains induced by irregular coordination of the La/Sr/Ca ions.
| Original language | English |
|---|---|
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 67 |
| Issue number | 18 |
| DOIs | |
| Publication status | Published - May 29 2003 |
| Externally published | Yes |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
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Cite this
Vuletić, T., Korin-Hamzić, B., Tomić, S., Gorshunov, B., Haas, P., Dressel, M., Akimitsu, J., Sasaki, T., & Nagata, T. (2003). Variable-range hopping conductivity in the copper-oxygen chains of La3Sr3Ca8Cu24O41 Physical Review B - Condensed Matter and Materials Physics, 67(18). https://doi.org/10.1103/PhysRevB.67.184521