Reconstruction of the Fermi surface
Abstract
The effects of structural supermodulation with the period $λ ≈ 26$ Å along the $$b$$ axis of have been observed in photoemission studies from the early days as the presence of “diffraction replicas” of the intrinsic electronic structure. Although predicted to affect the electronic structure of the Cu-O plane, the influence of supermodulation potential on Cu-O electrons has never been observed in photoemission. In the present study, we clearly see the effects on the electronic structure; we observe a hybridization of the intrinsic bands with the supermodulation replica bands in the form of avoided crossings and a corresponding reconstruction of the Fermi surface. We estimate the hybridization gap, $$2Δ_h ~ 25$$ meV, in the slightly underdoped samples. The hybridization weakens with doping and the anticrossing can no longer be resolved in strongly overdoped samples. In contrast, the “shadow” replica, shifted by ($π , π$) , is found not to hybridize with the original bands within our detection limits.
- Authors:
-
[1];
[2];
- Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics, Materials Science Dept.
- Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics, Materials Science Dept. ; Princeton Univ., NJ (United States)
- Publication Date:
- Research Org.:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1595691
- Report Number(s):
- BNL-213577-2020-JAAM
Journal ID: ISSN 2469-9950; PRBMDO; TRN: US2101070
- Grant/Contract Number:
- SC0012704; W911NF-12-1-0461
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 100; Journal Issue: 24; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Fermi surface; Structural properties; Physical Systems; Superconductors; Angle-resolved photoemission spectroscopy
Citation Formats
Valla, T., Pletikosić, I., Drozdov, I. K., and Gu, G. D. Reconstruction of the Bi2Sr2CaCu2O8+δ Fermi surface. United States: N. p., 2019.
Web. doi:10.1103/PhysRevB.100.241112.
Valla, T., Pletikosić, I., Drozdov, I. K., & Gu, G. D. Reconstruction of the Bi2Sr2CaCu2O8+δ Fermi surface. United States. https://doi.org/10.1103/PhysRevB.100.241112
Valla, T., Pletikosić, I., Drozdov, I. K., and Gu, G. D. Thu .
"Reconstruction of the Bi2Sr2CaCu2O8+δ Fermi surface". United States. https://doi.org/10.1103/PhysRevB.100.241112. https://www.osti.gov/servlets/purl/1595691.
@article{osti_1595691,
title = {Reconstruction of the Bi2Sr2CaCu2O8+δ Fermi surface},
author = {Valla, T. and Pletikosić, I. and Drozdov, I. K. and Gu, G. D.},
abstractNote = {The effects of structural supermodulation with the period $λ ≈ 26$ Å along the $b$ axis of Bi2Sr2CaCu2O8+δ have been observed in photoemission studies from the early days as the presence of “diffraction replicas” of the intrinsic electronic structure. Although predicted to affect the electronic structure of the Cu-O plane, the influence of supermodulation potential on Cu-O electrons has never been observed in photoemission. In the present study, we clearly see the effects on the Bi2Sr2CaCu2O8+δ electronic structure; we observe a hybridization of the intrinsic bands with the supermodulation replica bands in the form of avoided crossings and a corresponding reconstruction of the Fermi surface. We estimate the hybridization gap, $2Δ_h ~ 25$ meV, in the slightly underdoped samples. The hybridization weakens with doping and the anticrossing can no longer be resolved in strongly overdoped samples. In contrast, the “shadow” replica, shifted by ($π , π$) , is found not to hybridize with the original bands within our detection limits.},
doi = {10.1103/PhysRevB.100.241112},
journal = {Physical Review B},
number = 24,
volume = 100,
place = {United States},
year = {Thu Dec 19 00:00:00 EST 2019},
month = {Thu Dec 19 00:00:00 EST 2019}
}
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