We study the behavior of the pseudogap in overdoped Bi2Sr2CaCu2O8+d by electronic Raman scattering (ERS) and angle-resolved photoemission spectroscopy (ARPES) on the same single crystals. Using both techniques we find that, unlike the superconducting gap, the pseudogap related to the anti-bonding band vanishes above the critical doping pc = 0.22. Concomitantly, we show from ARPES measurements that the Fermi surface of the anti-bonding band is hole-like below pc and becomes electron-like above pc. This reveals that the appearance of the pseudogap depends on the Fermi surface topology in Bi2Sr2CaCu2O8+d , and more generally, puts strong constraint on theories of the pseudogap phase.
@article{arxiv.1804.02453,
title = {Unambiguous connection between the Fermi surface topology and the pseudogap in Bi$_{2}$Sr$_2$CaCu$_2$O$_{8+d}$},
author = {B. Loret and Y. Gallais and M. Cazayous and R. D. Zhong and J. Schneeloch and G. D. Gu and A. Fedorov and T. K. Kim and S. V. Borisenko and A. Sacuto},
journal= {arXiv preprint arXiv:1804.02453},
year = {2018}
}