Polarized Cu L-edge X-ray absorption spectra (XAS) measurements of the unoccupied electronic state of 3d(x)2-(y)2 symmetry in superconducting La1.85Sr0.15CuO4 Single crystals show a temperature dependent anomalous decrease of the density of itinerant holes below similar to 100 K. The anomalous temperature coincides with the temperature of the metal to insulator (MI) transition and local lattice distortions in the CuO2 plane. The results give direct evidence of decrease of itinerant states in the CuO2 plane due to local lattice distortions across the MI crossover in the normal state.
Decrease of Itinerant Holes Near the Metal to Insulator Crossover in Superconducting La1.85Sr0.15CuO4 / Saini, Naurang Lal; A., Lanzara; Bianconi, Antonio; D. S. L., Law; A., Menovsky; K. B., Garg; H., Oyanagi. - In: JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN. - ISSN 0031-9015. - STAMPA. - 67:(1998), pp. 393-396. [10.1143/JPSJ.67.393]
Decrease of Itinerant Holes Near the Metal to Insulator Crossover in Superconducting La1.85Sr0.15CuO4
SAINI, Naurang Lal;BIANCONI, Antonio;
1998
Abstract
Polarized Cu L-edge X-ray absorption spectra (XAS) measurements of the unoccupied electronic state of 3d(x)2-(y)2 symmetry in superconducting La1.85Sr0.15CuO4 Single crystals show a temperature dependent anomalous decrease of the density of itinerant holes below similar to 100 K. The anomalous temperature coincides with the temperature of the metal to insulator (MI) transition and local lattice distortions in the CuO2 plane. The results give direct evidence of decrease of itinerant states in the CuO2 plane due to local lattice distortions across the MI crossover in the normal state.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
