Quasi one-dimensional hopping conductivity of the non-stoichiometric spin-ladder CaCu2O3 single crystals
Resistivity, ρ (T), of the spin-ladder compound CaCu2O3 is investigated between T ~ 100 − 350 K. Both nearest-neighbor hopping, ρ (T) ~ exp (Ea/kT), and variable-range hopping, ρ (T) ~ exp [(T0/T)3/4 ], quasi one-dimensional conductivity mechanisms are observed above and below T ~ 200 K, respe...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
D.Ghitu Institute of Electronic Engineering and Nanotechnologies
2009-02-01
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| Series: | Moldavian Journal of the Physical Sciences |
| Online Access: | https://mjps.nanotech.md/archive/2009/article/4010 |
| _version_ | 1798027853321732096 |
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| author | Lisunov, Constantin Aruşanov, Ernest Wizent, N Waske, A Werner, J Tristan, Neumann Sekar, C Krabbes, G Behr, G Buchner, B |
| author_facet | Lisunov, Constantin Aruşanov, Ernest Wizent, N Waske, A Werner, J Tristan, Neumann Sekar, C Krabbes, G Behr, G Buchner, B |
| author_sort | Lisunov, Constantin |
| collection | DOAJ |
| description | Resistivity, ρ (T), of the spin-ladder compound CaCu2O3 is investigated between T ~
100 − 350 K. Both nearest-neighbor hopping, ρ (T) ~ exp (Ea/kT), and variable-range hopping,
ρ (T) ~ exp [(T0/T)3/4
], quasi one-dimensional conductivity mechanisms are observed above
and below T ~ 200 K, respectively. The activation energy Ea and the VRH characteristic temperature T0 exhibit high sensitivity to the cation (Ca, Cu) content, attributable to a corresponding variation of the concentration of intrinsic defects associated with Cu vacancies. On the
other hand, no direct dependence of Ea and T0 on the excess oxygen concentration is found. |
| first_indexed | 2024-04-11T18:58:15Z |
| format | Article |
| id | doaj.art-383d3bad8c494fd88b22350167bc431d |
| institution | Directory Open Access Journal |
| issn | 1810-648X 2537-6365 |
| language | English |
| last_indexed | 2024-04-11T18:58:15Z |
| publishDate | 2009-02-01 |
| publisher | D.Ghitu Institute of Electronic Engineering and Nanotechnologies |
| record_format | Article |
| series | Moldavian Journal of the Physical Sciences |
| spelling | doaj.art-383d3bad8c494fd88b22350167bc431d2022-12-22T04:08:07ZengD.Ghitu Institute of Electronic Engineering and NanotechnologiesMoldavian Journal of the Physical Sciences1810-648X2537-63652009-02-018136404010Quasi one-dimensional hopping conductivity of the non-stoichiometric spin-ladder CaCu2O3 single crystalsLisunov, ConstantinAruşanov, ErnestWizent, NWaske, AWerner, JTristan, NeumannSekar, CKrabbes, GBehr, GBuchner, BResistivity, ρ (T), of the spin-ladder compound CaCu2O3 is investigated between T ~ 100 − 350 K. Both nearest-neighbor hopping, ρ (T) ~ exp (Ea/kT), and variable-range hopping, ρ (T) ~ exp [(T0/T)3/4 ], quasi one-dimensional conductivity mechanisms are observed above and below T ~ 200 K, respectively. The activation energy Ea and the VRH characteristic temperature T0 exhibit high sensitivity to the cation (Ca, Cu) content, attributable to a corresponding variation of the concentration of intrinsic defects associated with Cu vacancies. On the other hand, no direct dependence of Ea and T0 on the excess oxygen concentration is found.https://mjps.nanotech.md/archive/2009/article/4010 |
| spellingShingle | Lisunov, Constantin Aruşanov, Ernest Wizent, N Waske, A Werner, J Tristan, Neumann Sekar, C Krabbes, G Behr, G Buchner, B Quasi one-dimensional hopping conductivity of the non-stoichiometric spin-ladder CaCu2O3 single crystals Moldavian Journal of the Physical Sciences |
| title | Quasi one-dimensional hopping conductivity of the non-stoichiometric spin-ladder CaCu2O3 single crystals |
| title_full | Quasi one-dimensional hopping conductivity of the non-stoichiometric spin-ladder CaCu2O3 single crystals |
| title_fullStr | Quasi one-dimensional hopping conductivity of the non-stoichiometric spin-ladder CaCu2O3 single crystals |
| title_full_unstemmed | Quasi one-dimensional hopping conductivity of the non-stoichiometric spin-ladder CaCu2O3 single crystals |
| title_short | Quasi one-dimensional hopping conductivity of the non-stoichiometric spin-ladder CaCu2O3 single crystals |
| title_sort | quasi one dimensional hopping conductivity of the non stoichiometric spin ladder cacu2o3 single crystals |
| url | https://mjps.nanotech.md/archive/2009/article/4010 |
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