LSCO+O Cu-O bond-stretching phonons
The mechanism responsible for superconductivity in LSCO and LSCO+O is still unknown. Recently an anomaly in the Cu-O bond-stretching phonon has been observed in optimally doped LSCO. Comparison with ARPES data indicate that this anomaly is connected to a novel charge collective mode which, in turn, may be relevant to the superconductivity mechanism. We propose to study this Cu-O bond-stretching phonon in a LSCO+O single crystal sample which is strongly underdoped with respect to Sr, but has optimal Tc due to the interstitial oxygen.
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TEJSNER Tim Birger; BOEHM Martin; PIOVANO Andrea; TUTUEANU Ana Elena and UDBY Linda. (2018). LSCO+O Cu-O bond-stretching phonons. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.7-01-458
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