Fermi Surface and Band Dispersion in La2-xSrxCuO4

Abstract

Using angle-resolved photoemission spectroscopy (ARPES), we have observed the band structure, Fermi surface and their doping dependences in La2-xSrxCuO4. The results reveal that the Fermi surface undergoes a dramatic change: it is hole-like and centered at k=(pi,pi) in underdoped (x = 0.1) and optimally doped (x = 0.15) samples as in other cuprates while it is electron-like and centered at (0,0) in heavily overdoped (x = 0.3) ones. The peak in the ARPES spectra near (pi/2,pi/2) is broad and weak unlike in other cuprates. In the underdoped and optimally doped samples, a superconducting gap (Delta = 10 - 15 meV) is observed on the Fermi surface near (pi,0).

arXiv comment5 pages, 4 EPS figures, uses epsf.sty

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Cited by in corpus (59)

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• The Antiferromagnetic Band Structure of La2CuO4 Revisited
• Instability toward Formation of Quasi-One-Dimensional Fermi Surface in Two-Dimensional t-J Model
• Possible Quasi-One-Dimensional Fermi Surface in La_{2-x}Sr_{x}CuO_4
• Electronic Structure of La2-xSrxCuO4 in the Vicinity of the Superconductor-Insulator Transition
• Angle-resolved photoemission in high Tc cuprates from theoretical viewpoints
• Low-Energy Electronic Structure of the High-Tc Cuprates La2-xSrxCuO4 Studied by Angle-resolved Photoemission Spectroscopy
• Pseudogap and antiferromagnetic correlations in the Hubbard model
• Effects of carrier concentration on the superfluid density of high-T_c cuprates
• The Hubbard model within the equations of motion approach
• Dual Nature of the Electronic Structure of the Stripe Phase
• One-dimensional metallic behavior of the stripe phase in La${}_{2-x}$Sr${}_x$CuO${}_4$
• Proposal of an extended t-J Hamiltonian for high-Tc cuprates from ab initio calculations on embedded clusters
• Effects of next-nearest-neighbor hopping $t^{\prime }$ on the electronic structure of cuprates
• ARPES Spectra of the Hubbard model
• The change of Fermi surface topology in Bi2Sr2CaCu2O8 with doping
• Magnetic excitations and their anisotropy in YBCO: slave-boson mean-field analysis of bilayer t-J model
• Electronic Structure of Stripes in Two-Dimensional Hubbard Model
• Effect of Stripes on Electronic States in Underdoped La_{2-x}Sr_xCuO_4
• Low energy theory of the t-t'-t''-U Hubbard Model at half-filling: interaction strengths in cuprate superconductors and an effective spin-only description of La_2CuO_4
• Electron-Like Fermi Surface and Remnant (pi,0) Feature in Overdoped La1.78Sr0.22CuO4
• Evolution of the stripe phase as a function of doping from a theoretical analysis of angle-resolved photoemission data
• Spontaneous deformation of the Fermi surface due to strong correlation in the two-dimensional t-J model
• Stripe structure, spectral feature and soliton gap in high Tc cuprates
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• Angle-resolved photoemission study of insulating and metallic Cu-O chains in PrBa${}_2$Cu${}_3$O${}_7$ and PrBa${}_2$Cu${}_4$O${}_8$
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• Cofermion Theory for Pseudogap Phenomena and Superconducting Mechanism of Underdoped Cuprate Superconductors
• Magnetic Excitation of t-J Model with Quasi-One-Dimensional Fermi Surface -- Possible Relevance to LSCO Systems
• Spin and charge excitations in incommensurate spin density waves
• Low-frequency spins and the ground state in high-Tc cuprates
• Violation of Ioffe-Regel condition but saturation of resistivity of the high Tc cuprates
• A link between the spin fluctuation and Fermi surface in high T_C cuprates --- A consistent description within the single-band Hubbard model
• d_{x^2-y^2}-Wave Pairing Fluctuations and Pseudo Spin Gap in Two-Dimensional Electron Systems
• Fractional spin excitations in the infinite-layer cuprate CaCuO${}_2$
• Magnetic excitations in La-based cuprate superconductors: slave-boson mean-field analysis of the two-dimensional t-J model
• Temperature Dependence of Spin Correlation and Charge Dynamics in the Stripe Phase of High-T_c Superconductors
• Hall coefficient and angle-resolved photoemission in systems with strong pair fluctuations
• On the violation of the Fermi-liquid picture in two-dimensional systems owing to the Van-Hove singularities
• Magnetic Coherence as a Universal Feature of Cuprate Superconductors
• Local properties and Density of States in the two-dimensional p-d Model
• In-plane optical features of the underdoped La_2CuO_4 based compounds: theoretical multiband analysis
• Single-Particle Pseudogap in Two-Dimensional Electron Systems
• Destabilization of the Zhang-Rice singlet at optimal doping
• Phenomenological theory of spin excitations in La- and Y-based cuprates
• Spectral function of the electron in a superconducting RVB state
• On the (anisotropic) uniform metallic ground states of fermions interacting through arbitrary two-body potentials in d dimensions
• Theory of Electron Differentiation, Flat Dispersion and Pseudogap Phenomena
• Effects of extended impurity perturbation in d-wave superconductor
• Difference between microscopic and effective overlaps in the copper-oxide planes of high-Tc superconductors
• Photoemission in the system of linear chains : application to PrBa${}_2$Cu${}_3$O${}_7$ and La${}_{2-\mathrm{x}-\mathrm{y}}$Nd${}_{\mathrm{y}}$Sr${}_{\mathrm{x}}$CuO${}_4$
• Influence of spin structures and nesting on Fermi surface and a pseudogap anisotropy in t-t'-U Hubbard model
• Stripes and Pairing in High Temperature Superconductors
• Competition between Hidden Spin and Charge Orderings in Stripe Phase