ARPES spectral functions and Fermi surface for La{sub 1.86}Sr{sub 0.14}CuO{sub 4} compared with LDA + DMFT + {Sigma}{sub k} calculations

Journal Article · Tue Jun 15 00:00:00 EDT 2010 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776110060099· OSTI ID:21443502

Kokorina, E E; Kuchinskii, E Z; Sadovskii, M V ^[1]; Kasai, S; Sekiyama, A; Suga, S ^[2]

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1. Russian Academy of Sciences, Institute for Electrophysics (Russian Federation)
2. Osaka University, Graduate School of Engineering Science (Japan)

The slightly underdoped high-temperature system La{sub 1.86}Sr{sub 0.14}CuO{sub 4} (LSCO) is studied by means of high-energy high-resolution angular resolved photoemission spectroscopy (ARPES) and the combined LDA + DMFT + {Sigma}{sub k} computational scheme. The corresponding one-band Hubbard model is solved via dynamical mean field theory (DMFT), and the model parameters needed are obtained from first principles in the local density approximation (LDA). An 'external' k-dependent self-energy {Sigma}{sub k} describes the interaction of correlated electrons with antiferromagnetic (AFM) pseudogap fluctuations. Experimental and theoretical data clearly show a 'destruction' of the LSCO Fermi surface in the vicinity of the ({pi}, 0) point and formation of 'Fermi arcs' in the nodal directions. ARPES energy distribution curves as well as momentum distribution curves demonstrate a deviation of the quasiparticle band from the Fermi level around the ({pi}, 0) point. The same behavior of spectral functions follows from theoretical calculations suggesting the AFM origin of the pseudogap state.

• OSTI ID: 21443502
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 110, Issue 6; Other Information: DOI: 10.1134/S1063776110060099; Copyright (c) 2010 Pleiades Publishing, Ltd.; ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIFERROMAGNETISM
APPROXIMATIONS
CUPRATES
ELECTRON CORRELATION
EMISSION SPECTROSCOPY
ENERGY SPECTRA
FERMI LEVEL
FLUCTUATIONS
HUBBARD MODEL
LANTHANUM COMPOUNDS
MEAN-FIELD THEORY
PHOTOEMISSION
SELF-ENERGY
SPECTRAL FUNCTIONS
STRONTIUM COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CALCULATION METHODS
COPPER COMPOUNDS
CORRELATIONS
CRYSTAL MODELS
EMISSION
ENERGY
ENERGY LEVELS
FUNCTIONS
MAGNETISM
MATHEMATICAL MODELS
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
SECONDARY EMISSION
SPECTRA
SPECTROSCOPY
TRANSITION ELEMENT COMPOUNDS
VARIATIONS