One-dimensional hopping conductivity of the spin-ladder CaCu2O3 single crystals

Arushanov Ernest; Behr Gunther U.; Broto Jean-Mark; Chou F.; Lisunov Konstantin; Raquet Bertrand; Wizent Nadja

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ARUSHANOV, 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

One-dimensional hopping conductivity of the spin-ladder CaCu2O3 single crystals

Pag. 22-25

Arushanov Ernest¹, Behr Gunther U.², Broto Jean-Mark³, Chou F.⁴, Lisunov Konstantin¹, Raquet Bertrand³, Wizent Nadja²

¹ Institute of Applied Physics, Academy of Sciences of Moldova,
² Leibniz Institute for Solid State and Materials Reseach, Dresden,
³ Laboratoire National des Champs Magnétiques Intenses, Toulouse,
⁴ Massachusetts Institute of Technology

Disponibil în IBN: 14 decembrie 2013

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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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