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H. J. Sajosch

Publications and source records attributed to H. J. Sajosch.

2 recordsLinked to original sources

Interplay between intrinsic magnetism, semiconductivity and superconductivity in a single CuO_2 plane

In this paper, an attempt is made to elucidate some aspects of the charge transport in a single CuO_2 plane. During the doping process, the simultaneously introduced oxygen holes as well as the electrons create two components plasma. Whereas the oxygen holes generate a crystal lattice controlled by the repulsive Coulomb force, the conduction electrons having significant momentum components in diagonal directions of the CuO_2 plane are locked in an "electron wave guide" which is the consequence of multiple magnetic scattering on diagonally running chains of Cu atoms with mutually opposite spins, i.e. magnetic stripes. The oxygen holes lattice and the magnetic stripes are confinements for moving conduction electrons and their mutual modulation leads directly to pairs of parallel electron currents, which are equivalent to moving pairs of electrons. This kind of electron currents can exist as long as the antiferromagnetic background exists, i.e. up to the Curie temperature. In turn, the oxygen hole lattice can exist as long as the Coulomb forces balance the longitudinal and the transversal thermal displacements of oxygen hole from their equilibrium positions in the hole lattice.

cond-mat.supr-con↗

Quasi-static oxygen hole lattice in the CuO_2 plane and its temperature rigidity

The possible scenario of what happens in the plane during the doping of cuprates with oxygen holes is subject of this brief communication. The simultaneously inserted oxygen holes and electrons create two components plasma. The oxygen holes driven by the repelling Coulomb force create a quasi-static lattice, the dimension of which depends on the doping level. The stability of such a lattice, according to the equipartition theorem, depends on the temperature. On this basis one can define the temperature at which the Coulomb repelling energy is balanced by thermal energy of the displacements of oxygen holes from their equilibrium positions in the hole lattice. This balance temperature is amazingly close to the superconducting transition temperature within range defining by doping dome for cuprates.

cond-mat.supr-con↗