Resistivity and Hall coefficient have been measured over the temperature range below 300 K for superconducting (La 1- x Sr x ) 2 CuO 4 single crystal thin films epitaxially grown on SrTiO 3 (100) by magnetron sputtering. It is found that the carrier density at 300 K is 6.8×10 21 cm -3 and that it decreases notably with falling temperature. Carrier localization due to oxygen vacancies is briefly discussed.
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Suzuki et al. (1987) studied this question.
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