Archive: 2009 - Moldavian Journal of the Physical Sciences

05 Feb 2009

2009
V. 8
1
(p.36 - 40)

Quasi one-dimensional hopping conductivity of the non-stoichiometric spin-ladder CaCu2O3 single crystals

Authors:

Lisunov, Constantin; Aruşanov, Ernest; Wizent, N; Waske, A; Werner, J; Tristan, Neumann; Sekar, C; Krabbes, G; Behr, G; Buchner, B

Summary:

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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<meta name="citation_title" content="Quasi one-dimensional hopping conductivity of  the non-stoichiometric spin-ladder CaCu2O3 single crystals 
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BibTeX

@article{ibn_4010,
author = {Lisunov, C.G. and Aruşanov, E.C. and Wizent, N. and Waske, A. and Werner, J. and Tristan, N. and Sekar, C. and Krabbes, G. and Behr, G. and Buchner, B.},
title = {Quasi one-dimensional hopping conductivity of  the non-stoichiometric spin-ladder CaCu2O3 single crystals 
},
journal = {Moldavian Journal of the Physical Sciences},
year = {2009},
volume = {8 (1)},
pages = {36-40},
month = {Feb},
abstract = {(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. },
url = {https://ibn.idsi.md/vizualizare_articol/4010},
}

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ρ (T) ~ exp [(T0/T)3/4
], quasi one-dimensional conductivity mechanisms are observed above 
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<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 
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<dc:source>Moldavian Journal of the Physical Sciences 8 (1) 36-40</dc:source>
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SM ISO690:2012

LISUNOV, Konstantin; ARUSHANOV, 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 . In: Moldavian Journal of the Physical Sciences. 2009, nr. 1(8), pp. 36-40. ISSN 1810-648X.