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
·
· Journal of Experimental and Theoretical Physics
- Russian Academy of Sciences, Institute for Electrophysics (Russian Federation)
- 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, Journal Name: Journal of Experimental and Theoretical Physics Journal Issue: 6 Vol. 110; ISSN 1063-7761
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ANTIFERROMAGNETISM
APPROXIMATIONS
CALCULATION METHODS
COPPER COMPOUNDS
CORRELATIONS
CRYSTAL MODELS
CUPRATES
ELECTRON CORRELATION
EMISSION
EMISSION SPECTROSCOPY
ENERGY
ENERGY LEVELS
ENERGY SPECTRA
FERMI LEVEL
FLUCTUATIONS
FUNCTIONS
HUBBARD MODEL
LANTHANUM COMPOUNDS
MAGNETISM
MATHEMATICAL MODELS
MEAN-FIELD THEORY
OXYGEN COMPOUNDS
PHOTOEMISSION
RARE EARTH COMPOUNDS
SECONDARY EMISSION
SELF-ENERGY
SPECTRA
SPECTRAL FUNCTIONS
SPECTROSCOPY
STRONTIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
VARIATIONS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ANTIFERROMAGNETISM
APPROXIMATIONS
CALCULATION METHODS
COPPER COMPOUNDS
CORRELATIONS
CRYSTAL MODELS
CUPRATES
ELECTRON CORRELATION
EMISSION
EMISSION SPECTROSCOPY
ENERGY
ENERGY LEVELS
ENERGY SPECTRA
FERMI LEVEL
FLUCTUATIONS
FUNCTIONS
HUBBARD MODEL
LANTHANUM COMPOUNDS
MAGNETISM
MATHEMATICAL MODELS
MEAN-FIELD THEORY
OXYGEN COMPOUNDS
PHOTOEMISSION
RARE EARTH COMPOUNDS
SECONDARY EMISSION
SELF-ENERGY
SPECTRA
SPECTRAL FUNCTIONS
SPECTROSCOPY
STRONTIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
VARIATIONS