Origin of Magnetoresistance Anomalies in Antiferromagnetic YBa_{2}Cu_{3}O_{6+x}

Abstract

Specific d-wave angular dependence of the in-plane magnetoresistence in antiferromagnetic tetragonal YBa_{2}Cu_{3}O_{6+x} (x~0.3) on orientation of the external magnetic field in (a,b) plane is assigned to the effective hole transport through low lying excited purely oxygen doublet O2pe_u state, not the ground b_{1g}(d_{x^2-y^2}) state. External magnetic field determines the orientation of the strong exchange field for the spin-triplet b_{1g}e_u:{}^{3}E_u state of the hole CuO_4 center and due to the spin-orbital coupling results in either orbital polarization of the E_u doublet giving rise to the spatial anisotropy of the hole transport. Experimental data allow to estimate parameter of the effective spin Hamiltonian.

11 pages, 2 figures, elsart style

References in corpus (6)

• Photoemission Evidence for a Remnant Fermi Surface and d-Wave-Like Dispersion in Insulating Ca2CuO2Cl2
• Magnetoresistance Anomalies in Antiferromagnetic YBa_2Cu_3O_{6+x}: Fingerprints of Charged Stripes
• Angle resolved photoemission spectroscopy of Sr_2CuO_2Cl_2 - a revisit
• Comment on ``Magnetoresistance Anomalies in Antiferromagnetic YBa${}_2$Cu${}_3$O${}_{6+x}$: Fingerprints of Charged Stripes''
• The singlet-triplet magnetism and induced spin fluctuations in the high-$T_c$ copper oxides
• The Singlet-Triplet Pseudo-Jahn-Teller Centers in Copper Oxides

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• High magnetic field evolution of the in-plane angular magnetoresistance of electron-doped Sr1-xLaxCuO2 in the normal state