Crossovers in the out-of-plane resistivity of superconducting Tl2Ba2CaCu2O8 single crystals

J. P. Salvetat, H. Berger, A. Halbritter, G. Mihály, D. Pavuna, L. Forró

Research output: Contribution to journalArticle

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Abstract

We report the in-plane (ρab) and out-of-plane (ρc) resistivities in the 4 800 Κ range on single crystals of Tl2Ba2CaCu2O8 high-Τc cuprate with Τc = 111 Κ (ρcab ≈ 1000). ρab(Τ) exhibits "usual" linear behavior and ρc(Τ) follows generally metallic-like, positive slope in the 150 400 Κ temperature range. There is a clear crossover to semiconductor-like behavior close to Τc. However, for the first time in a chainless high-Τc cuprate we observe a crossover above 500 Κ due to hopping conduction. Under high pressures (<IS kbar) the magnitude of ρc strongly decreases, yet the ρc(Τ) slope does not change. This suggests that the out-of-plane charge transport is governed by the interplane tunneling rate.

Original languageEnglish
Pages (from-to)584-588
Number of pages5
JournalEPL
Volume52
Issue number5
DOIs
Publication statusPublished - Dec 1 2000

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cuprates
crossovers
slopes
electrical resistivity
single crystals
conduction
temperature

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  • Physics and Astronomy(all)

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Crossovers in the out-of-plane resistivity of superconducting Tl2Ba2CaCu2O8 single crystals. / Salvetat, J. P.; Berger, H.; Halbritter, A.; Mihály, G.; Pavuna, D.; Forró, L.

In: EPL, Vol. 52, No. 5, 01.12.2000, p. 584-588.

Research output: Contribution to journalArticle

Salvetat, J. P. ; Berger, H. ; Halbritter, A. ; Mihály, G. ; Pavuna, D. ; Forró, L. / Crossovers in the out-of-plane resistivity of superconducting Tl2Ba2CaCu2O8 single crystals. In: EPL. 2000 ; Vol. 52, No. 5. pp. 584-588.
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AU - Pavuna, D.

AU - Forró, L.

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N2 - We report the in-plane (ρab) and out-of-plane (ρc) resistivities in the 4 800 Κ range on single crystals of Tl2Ba2CaCu2O8 high-Τc cuprate with Τc = 111 Κ (ρc/ρab ≈ 1000). ρab(Τ) exhibits "usual" linear behavior and ρc(Τ) follows generally metallic-like, positive slope in the 150 400 Κ temperature range. There is a clear crossover to semiconductor-like behavior close to Τc. However, for the first time in a chainless high-Τc cuprate we observe a crossover above 500 Κ due to hopping conduction. Under high pressures (<IS kbar) the magnitude of ρc strongly decreases, yet the ρc(Τ) slope does not change. This suggests that the out-of-plane charge transport is governed by the interplane tunneling rate.

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