Doping dependence of the Fermi surface in the cuprates: A photoemission investigation

We have exploited angle-resolved photoelectron spectroscopy (ARPES) to study the electronic structure of single crystal samples of high T-c material Bi2Sr2CaCu2O8+delta and of the antiferromagnetic insulator Sr2CuO2Cl2. As one moves away from optimal doping into underdoped region (T-c as low as 30K), the large Fermi surface sheet centered around the (pi,pi) point evolves into a small pocket centered around (pi/2,pi/2), and the saddle-point van Hove singularity is lost This evolution can be extrapolated to Sr2CuO2Cl2, which is apparently well described by the mean field spin-density wave calculation.


Published in:
Helvetica Physica Acta, 69, 25-26
Year:
1996
ISSN:
0018-0238
Laboratories:




 Record created 2010-04-07, last modified 2018-03-17


Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)