Spin-phonon interaction and band effects in the high-T_C superconductor HgBa_2CuO_4

Abstract

Band calculations show that a stripe-like anti-ferromagnetic spin wave is enforced by a 'half-breathing' phonon distortion within the CuO plane of HgBa_2CuO_4. This spin-phonon coupling is increased further by shear distortion and by increased distance between Cu and apical oxygens. The effects from spin-phonon coupling are consistent with many observations in high-T_C materials. Spin-phonon coupling can be important for the mechanism of spin fluctuations and superconductivity, although the effects are quantitatively weak when using the local density potential.

4 pages, 1 figure

References in corpus (4)

• Band-structure trend in hole-doped cuprates and correlation with Tcmax
• Spin fluctuations, electron-phonon coupling and superconductivity in near-magnetic elementary metals; Fe,Co,Ni and Pd
• Ferromagnetic and antiferromagnetic spin fluctuations and superconductivity in the hcp-phase of Fe
• Spin-phonon interaction in doped high-T${}_C$ superconductors from density functional calculations

Cited by in corpus (10)

• Direct Role of Structural Dynamics in Electron-Lattice Coupling of Superconducting Cuprates
• Fermi surface reconstruction of superoxygenated La${}_2$CuO${}_4$ with ordered oxygen interstitials
• Large magneto-thermal effect and the spin-phonon coupling in a parent insulating cuprate Pr_{1.3}La_{0.7}CuO_4
• Properties of high-T${}_C$ copper oxides from the nearly-free electron model
• Mechanisms for higher $T_C$ in copper oxide superconductors; Ideas from band calculations
• Anti-ferromagnetism, spin-phonon interaction and the local-density approximation in high-T${}_C$ superconductors
• Spin-phonon coupling, q-dependence of spin excitations and high-T${}_C$ superconductivity from band models
• Multiple electronic components and Lifshitz transitions by oxygen wires formation in layered cuprates and nickelates
• Effects of excess or deficiency of oxygen content on the electronic structure of high-$T_C$ cuprates
• Electronic structure of HgBa${}_2$CuO${}_{4+\delta }$ with self-organized interstitial oxygen wires in the Hg spacer planes