Exchange Interaction between the Co^<2+> Ions with Degenerate Orbital States in CoO(Physics)

The kinetic exchange mechanism in Anderson\u27s theory of superexchange is formulated for the case of Co^ ion-pairs in CoO. The exchange interaction depends on the orbital angular-momentum operators as well as on the spin operators. The nearest neighbor interaction is shown to be largely anisotropic. The coefficients of the exchange interaction are estimated with the use of the following parameters : Mattheiss\u27 APW result and its modification for the transfer integrals, Anderson\u27s value for the effective Coulomb integral, and the experimental values for the intra-ionic exchange integral and the crystalline field splitting. The estimated values should be correct at least in order of magnitude on account of the fact that the same procedure in the cases of NiO and MnO give result in fairly good agreement with the experimental result. The potential exchange in CoO is also discussed

The Mechanisms of Telomere and Telomerase Regulation in Hematologic Malignancies

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The Mechanisms of Telomere and Telomerase Regulation in Hematologic Malignancies

11518