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SM ISO690:2012 LISUNOV, Konstantin, ARUSHANOV, Ernest, WIZENT, Nadja, WASKE, Anja, WERNER, Johannes, TRISTAN, Neumann, SEKAR, Chinnathambi, KRABBES, Gernot, BEHR, Gunther U., BUCHNER, Bernd B.. Quasi one-dimensional hopping conductivity of the non-stoichiometric spin-ladder CaCu2O3 single crystals. In: Moldavian Journal of the Physical Sciences, 2009, nr. 1(8), pp. 36-40. ISSN 1810-648X. |
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Moldavian Journal of the Physical Sciences | |
Numărul 1(8) / 2009 / ISSN 1810-648X /ISSNe 2537-6365 | |
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Pag. 36-40 | |
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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. |
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<?xml version='1.0' encoding='utf-8'?> <oai_dc:dc xmlns:dc='http://purl.org/dc/elements/1.1/' xmlns:oai_dc='http://www.openarchives.org/OAI/2.0/oai_dc/' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xsi:schemaLocation='http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd'> <dc:creator>Lisunov, C.G.</dc:creator> <dc:creator>Aruşanov, E.C.</dc:creator> <dc:creator>Wizent, N.</dc:creator> <dc:creator>Waske, A.</dc:creator> <dc:creator>Werner, J.</dc:creator> <dc:creator>Tristan, N.</dc:creator> <dc:creator>Sekar, C.</dc:creator> <dc:creator>Krabbes, G.</dc:creator> <dc:creator>Behr, G.</dc:creator> <dc:creator>Buchner, B.</dc:creator> <dc:date>2009-02-05</dc:date> <dc:description xml:lang='en'>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. </dc:description> <dc:source>Moldavian Journal of the Physical Sciences 8 (1) 36-40</dc:source> <dc:title>Quasi one-dimensional hopping conductivity of the non-stoichiometric spin-ladder CaCu2O3 single crystals</dc:title> <dc:type>info:eu-repo/semantics/article</dc:type> </oai_dc:dc>