Direct Observation of Asymmetric Sr Diffusion in Sr-δ-Doped La2CuO4
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چکیده
منابع مشابه
Direct Observation of Asymmetric Sr Diffusion in Sr--Doped La2CuO4
Superconductivity in copper oxides arises when a parent insulator compound is doped beyond some critical concentration [1]. In the case of La2CuO4 (LCO), high-Tc superconductivity is obtained either by substituting La 3+ with Sr 2+ or by inserting interstitial O 2[2]. Latest advance of the unique capabilities of layer-by-layer oxide molecular beam epitaxy (MBE) allows controlling the structural...
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We have studied the charge dynamics of Sr-doped La2CuO4 at hole concentration p = 0.07. We observed a clear indication of the competition between two Wigner lattice orders: One corresponds to a Tc = 15 K superconductivity and the other to Tc = 30K. Our results naturally explain the recent observation of metallic transport in extremely low (1%) Sr-doped La2CuO4 and establish a novel insulator to...
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ژورنال
عنوان ژورنال: Microscopy and Microanalysis
سال: 2014
ISSN: 1431-9276,1435-8115
DOI: 10.1017/s1431927614002566