Mechanisms for higher TC in copper oxide superconductors: Ideas from band calculations

Jarlborg, T.
May 2009
Applied Physics Letters;5/25/2009, Vol. 94 Issue 21, p212503
Academic Journal
Band calculations for the hole-doped La2CuO4 system show that artificial periodicities of Ba dopants can give the material different properties than from a uniform distribution of dopants. A periodicity within the planes make static pseudogaps, which could be tuned to raise the density-of-states at EF and the superconducting TC. A periodic doping dependence perpendicular to the CuO planes can increase the matrix element for spin fluctuations.


Related Articles

  • Influence of doping on the electronic and magnetic characteristics of the CuO[sub 2] plane. Tarasevich, Yu. Yu.; Vodolazskaya, I. V. // Physics of the Solid State;Nov97, Vol. 39 Issue 11, p1756 

    The influence of doping on the band structure, the position of the Fermi level, the plasma oscillation frequency, and the magnetic properties of a CuO[sub 2] layer is investigated.

  • Diffusion and transport of spin pulses in an n-type semiconductor quantum well. Jiang, L.; Weng, M. Q.; Wu, M. W.; Cheng, J. L. // Journal of Applied Physics;12/1/2005, Vol. 98 Issue 11, p113702 

    We perform a theoretical investigation on the time evolution of spin pulses in an n-type GaAs (001) quantum well with and without external electric field at high temperatures by constructing and numerically solving the kinetic spin Bloch equations and the Poisson equation, with the...

  • Temperature dependence of absorption edge in MOCVD grown GaN. Majid, Abdul; Ali, Akbar; Jianjun Zhu // Journal of Materials Science: Materials in Electronics;Dec2007, Vol. 18 Issue 12, p1229 

    We have studied the temperature dependence of absorption edge of GaN thin films grown on sapphire substrate by metal-organic chemical vapor deposition using optical absorption spectroscopy. A shift in absorption edge of about 55 meV has been observed in temperature range 273–343 K. We...

  • Fluctuation Induced Conductivity in Hg-Doped (CuTlHg)BaCa CuO Superconductor. Mumtaz, M.; Hasnain, S.; Khan, Nawazish // Journal of Superconductivity & Novel Magnetism;Apr2012, Vol. 25 Issue 2, p201 

    The fluctuation induced conductivity (FIC) analysis on resistivity data of the Hg-doped (CuTlHg)BaCaCuO ( x=0, 0.15, 0.25, 0.35) superconductor has been carried out in the light of the Aslamazov-Larken (AL) theory. The superconducting properties have been improved with Hg-doping (up to x=0.25)...

  • Photoluminescence study of heavy doping effects in Te-doped GaSb. Bignazzi, A.; Bosacchi, A.; Magnanini, R. // Journal of Applied Physics;6/1/1997, Vol. 81 Issue 11, p7540 

    The photoluminescence (PL) of heavily Te-doped GaSb has been investigated for different free carrier concentrations. A careful line shape analysis of the dominant free-to-bound transition has been performed using nonparabolic bands and taking into account the band tailing through the Kane model....

  • Pseudogap state of two-dimensional Kondo lattice. Barabanov, A. F.; Belemuk, A. M. // Journal of Experimental & Theoretical Physics;Aug2010, Vol. 111 Issue 2, p258 

    The pseudogap behavior of spectral function A( k, ω) of charge carriers is considered in the weak doping regime for a 2D Kondo lattice with a strong spin-hole antiferromagnetic interaction. The scattering of carriers is described in terms of a local polaron according to the irreducible Green...

  • Evolution of the Band Structure of Quasiparticles with Doping in Copper Oxides on the Basis of a Generalized Tight-Binding Method. Gavrichkov, V. A.; Ovchinnikov, S. G.; Borisov, A. A.; Goryachev, E. G. // Journal of Experimental & Theoretical Physics;Aug2000, Vol. 91 Issue 2, p369 

    Two methods for stabilizing the two-hole ³B[sub 1g] state as the ground state instead of the Zhang-Rice singlet are determined on the basis of an orthogonal cellular basis for a realistic multiband pd model of a CuO[sub 2] layer and the dispersion relations for the valence band top in undoped...

  • Energy Band Genesis from Sublattice States in Sulfides of Alkali Metals with an Antifluorite Lattice. Zhuravlev, Yu. N.; Kosobutskii, A. B.; Poplavnoi, A. S. // Russian Physics Journal;Feb2005, Vol. 48 Issue 2, p138 

    Based on the density functional, self-consistent band spectra from crystals and charged sublattices of alkali metal sulfides are calculated by the method of pseudopotential in the basis of localized orbitals. Different charge states of sublattices compatible with the electric neutrality of...

  • Approximate ab initio energies by systematic molecular fragmentation. Deev, Vitali; Collins, Michael A. // Journal of Chemical Physics;4/15/2005, Vol. 122 Issue 15, p154102 

    A scheme is introduced for generating a hierarchy of molecular fragmentations by which the total electronic energy can be approximated from the energies of the fragments. Higher levels in the hierarchy produce molecular fragments of larger size and approximate the total electronic energy more...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics