Anisotropies in insulating La${}_{2-x}$Sr${}_x$CuO${}_4$: angular resolved photoemission and optical absorption

Abstract

Due to the orthorhombic distortion of the lattice, the electronic hopping integrals along the $a$ and $b$ diagonals, the orthorhombic directions, are slightly different. We calculate their difference in the LDA and find $t_a^{\prime }-t_b^{\prime }\approx 8$meV. We argue that electron correlations in the insulating phase of La${}_{2-x}$Sr${}_x$CuO${}_4$, i. e. at doping $x\le 0.055,$ dramatically enhance the $(t_a^{\prime }-t_b^{\prime })$-splitting between the $a$- and $b$-hole valleys. In particular, we predict that the intensity of both angle-resolved photoemission and of optical absorption is very different for the $a$ and $b$ nodal points.

References in corpus (13)

• LDA energy bands, low-energy Hamiltonians, t', t'', t_{perp}(k), and J_{perp}
• Band-structure trend in hole-doped cuprates and correlation with Tcmax
• Muffin Tin Orbitals of Arbitrary Order
• Electrical Resistivity Anisotropy from Self-Organized One-Dimensionality in High-Temperature Superconductors
• Static magnetic correlations near the insulating-superconducting phase boundary in La${}_{2-x}$Sr${}_x$CuO${}_4$
• Observation of New Incommensurate Magnetic Correlations at the Lower Critical Concentration for Superconductivity (x=0.05) in La(2-x)Sr(x)CuO4
• Static and dynamic spin correlations in the spin-glass phase of slightly-doped La_{2-x}Sr_xCuO_4
• Electronic phase separation in lightly-doped La${}_{2-x}$Sr${}_x$CuO${}_4$
• Crystal structure and high-field magnetism of La2CuO4
• Theory of incommensurate magnetic correlations across the insulator-superconductor transition in underdoped La_{2-x}Sr_xCuO_4
• Destruction of Neel order and local spin spirals in insulating La_{2-x}Sr_xCuO_4
• Local spin spirals in the Neel phase of La_{2-x}Sr_xCuO_4
• Theory of Anisotropic Hopping Transport due to Spiral Correlations in the Spin-Glass Phase of Underdoped Cuprates

Cited by in corpus (2)

• Unravelling local spin polarization of Zhang-Rice singlet in lightly hole-doped cuprates using high-energy optical conductivity
• Numerical Studies on Antiferromagnetic Skyrmions in Nanodisks by Means of A New Quantum Simulation Approach