Doping-dependent electronic structure of cuprates studied using angle-scanned photoemission

Schwaller, Patrick; Greber, T.; Aebi, P.; Singer, J.M.; Berger, H.; Forró, L.; Osterwalder, J. (2000). Doping-dependent electronic structure of cuprates studied using angle-scanned photoemission The European Physical Journal B, 18(2), pp. 215-225. Springer 10.1007/s100510070051

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Full k-maps of the electronic structure near the Fermi level of differently doped cuprates measured with angle-scanned photoelectron spectroscopy are presented. The valence band maximum of the antiferromagnetic insulator Sr2CuO2Cl2, which is taken as a representative of an undoped cuprate, and the Fermi surfaces of overdoped, optimally doped and underdoped Bi2Sr2CaCu2O8+δ high-temperature superconductors are mapped in the normal state. The results confirm the existence of large Luttinger Fermi surfaces at high doping with a Fermi surface volume proportional to (1+x), where x is the hole concentration. At very low doping, however, we find that this assumption based on Luttinger's theorem is not fulfilled. This implies a change in the topology of the Fermi surface. Furthermore the intensity of the shadow bands observed on the Fermi surface of Bi2Sr2CaCu2O8+δ as a function of the doping is discussed.

Item Type:	Journal Article (Original Article)
Division/Institute:	School of Engineering and Computer Science > Institute for Surface Applied Laser, Phototonics and Surface Technologies ALPS School of Engineering and Computer Science
Name:	Schwaller, Patrick; Greber, T.; Aebi, P.; Singer, J.M.; Berger, H.; Forró, L. and Osterwalder, J.
ISSN:	1434-6028
Publisher:	Springer
Language:	English
Submitter:	Patrick Schwaller
Date Deposited:	10 Dec 2019 10:56
Last Modified:	18 Aug 2020 11:41
Publisher DOI:	10.1007/s100510070051
ARBOR DOI:	10.24451/arbor.9294
URI:	https://arbor.bfh.ch/id/eprint/9294