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...

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Autores principales:	Lisunov, Constantin, Aruşanov, Ernest, Wizent, N, Waske, A, Werner, J, Tristan, Neumann, Sekar, C, Krabbes, G, Behr, G, Buchner, B
Formato:	article
Lenguaje:	EN
Publicado:	D.Ghitu Institute of Electronic Engineering and Nanotechnologies 2009
Materias:	Physics QC1-999 Electronics TK7800-8360
Acceso en línea:	https://doaj.org/article/383d3bad8c494fd88b22350167bc431d
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spelling	oai:doaj.org-article:383d3bad8c494fd88b22350167bc431d2021-11-21T12:05:44ZQuasi one-dimensional hopping conductivity of the non-stoichiometric spin-ladder CaCu2O3 single crystals 2537-63651810-648Xhttps://doaj.org/article/383d3bad8c494fd88b22350167bc431d2009-02-01T00:00:00Zhttps://mjps.nanotech.md/archive/2009/article/4010https://doaj.org/toc/1810-648Xhttps://doaj.org/toc/2537-6365Resistivity, 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. Lisunov, ConstantinAruşanov, ErnestWizent, NWaske, AWerner, JTristan, NeumannSekar, CKrabbes, GBehr, GBuchner, BD.Ghitu Institute of Electronic Engineering and NanotechnologiesarticlePhysicsQC1-999ElectronicsTK7800-8360ENMoldavian Journal of the Physical Sciences, Vol 8, Iss 1, Pp 36-40 (2009)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999 Electronics TK7800-8360
spellingShingle	Physics QC1-999 Electronics TK7800-8360 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
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.
format	article
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
title	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_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_sort	quasi one-dimensional hopping conductivity of the non-stoichiometric spin-ladder cacu2o3 single crystals
publisher	D.Ghitu Institute of Electronic Engineering and Nanotechnologies
publishDate	2009
url	https://doaj.org/article/383d3bad8c494fd88b22350167bc431d
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Quasi one-dimensional hopping conductivity of the non-stoichiometric spin-ladder CaCu2O3 single crystals

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