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 SM ISO690:2012ARUSHANOV, Ernest, BEHR, Gunther U., BROTO, Jean-Mark, CHOU, F., LISUNOV, Konstantin, RAQUET, Bertrand, WIZENT, Nadja. One-dimensional hopping conductivity of the spin-ladder CaCu2O3 single crystals
. In: Moldavian Journal of the Physical Sciences, 2008, nr. 1(7), pp. 22-25. ISSN 1810-648X. |
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| Moldavian Journal of the Physical Sciences | |
| Numărul 1(7) / 2008 / ISSN 1810-648X /ISSNe 2537-6365 | |
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| Pag. 22-25 | |
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| Rezumat | |
Resistivity, ρ, of the spin-ladder compound CaCu2O3 is investigated between T ~ 130−
450 K. The ρ (T) data exhibit an activated dependence characterized by a nearest-neighbor
hopping followed by a variable-range hopping (VRH) regime when T is decreased. The observed VRH conductivity on the low-temperature interval obeys the law ln ρ ~ T −3/4
. This law
can be explained and the correct matching of the characteristic energy and length scales can
be found by treating CaCu2O3 as a three-dimensional array of quasi-one-dimensional electron
crystals. |
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