Abstract
The Fermi surface calculated within the rotating antiferromagnetism theory undergoes a topological change when doping changes from p-type to n-type, in qualitative agreement with experimental data for n-type cuprate Nd2−xCexCuO4 and p-type La2−xSrxCuO4. Also, the reconstruction of the Fermi surface, observed experimentally close to optimal doping in p-type cuprates, and slightly higher than optimal doping in the overdoped regime for this n-type high-TC cuprate, is well accounted for in this theory. This reconstruction is a consequence of the quantum criticality caused by the disappearance of rotating antiferromagnetism. The present results are in qualitative agreement with recently observed quantum oscillations in some high-TC cuprates. This paper presents new results about the application of the rotating antiferromagnetism theory to the study of the electronic structure for n-type materials.
Highlights
The topology and doping dependence of the Fermi surface (FS) of high-temperature superconductors (HTSC) are currently highly debated.Some observations from angle-resolved-photoemission spectroscopy (ARPES) experiments do not seem to see any FS reconstruction, but data collected from magnetoresistance measurements characterized by Shubnikov-de Haas (SdH) oscillations indicate that the FS undergoes a topology change due to some sort of symmetry breaking
Since no long range order has been observed so far in underdoped high-temperature superconductors (HTSCs), we proposed earlier that the FS reconstruction is caused by the hidden rotating antiferromagnetic order
We studied the reconstruction of the Fermi surface under the effect of the hidden rotating antiferromagnetic order in both p-type and n-type high-TC cuprates
Summary
The topology and doping dependence of the Fermi surface (FS) of high-temperature superconductors (HTSC) are currently highly debated. We support this proposal by new results for n-type cuprates and argue in favor of the FS of HTSCs undergoing topology reconstruction at specific doping levels in the framework of rotating antiferromagnetism theory (RAFT) [1]. We compare the evolution of the FS with doping in p-type and n-type HTSCs obtained in this theory and discuss it in connection mainly with available experimental data for n-type material Nd2−x Cex CuO4 and p-type one La2−x Srx CuO4. In the low-doping limit (underdoped regime), RAFT yields a small almost square FS centered around (π, 0) points for n-type Nd2−x Cex CuO4 in qualitative agreement with SdH oscillations, which indicate the existence of a FS in the form of small pockets [2].
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