Some experiments have recently shown that in the YBCO detwinned system charge aggregation takes place in the Cu–O2 plane along the b-axis at T≫Tc followed by formation of Cooper pairs, again in the normal state. Polarised X-ray absorption measurements at the O K and Cu L3 absorption edges in E∥b orientation have been carried out on underdoped and overdoped single crystals of La2−xSrxCuO4 through a temperature range of 10–300 K to study the dependence of the itinerant hole density. Both the crystals do show an anomalous temperature dependence but there is a wide divergence in the earlier and our results. This paper discusses the results and possible causes for the difference.
Study of anomalous temperature dependence of itinerant holes in under- and overdoped La2-xSrxCuO4 single crystals using polarised soft X-ray absorption spectroscopy / R. K., Singhal; Saini, Naurang Lal; S., Dalela; B. R., Sekhar; D. C., Jain; K. B., Garg. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION B, BEAM INTERACTIONS WITH MATERIALS AND ATOMS. - ISSN 0168-583X. - 199:(2003), pp. 280-285. [10.1016/S0168-583X(02)01574-4]
Study of anomalous temperature dependence of itinerant holes in under- and overdoped La2-xSrxCuO4 single crystals using polarised soft X-ray absorption spectroscopy
SAINI, Naurang Lal;
2003
Abstract
Some experiments have recently shown that in the YBCO detwinned system charge aggregation takes place in the Cu–O2 plane along the b-axis at T≫Tc followed by formation of Cooper pairs, again in the normal state. Polarised X-ray absorption measurements at the O K and Cu L3 absorption edges in E∥b orientation have been carried out on underdoped and overdoped single crystals of La2−xSrxCuO4 through a temperature range of 10–300 K to study the dependence of the itinerant hole density. Both the crystals do show an anomalous temperature dependence but there is a wide divergence in the earlier and our results. This paper discusses the results and possible causes for the difference.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
