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Bonding, Moment Formation, and Magnetic Interactions in Ca14MnBi11 and Ba14MnBi11
D. Sanchez-Portal, Richard M. Martin, S. M. Kauzlarich +1
The ``14-1-11'' phase compounds based on magnetic Mn ions and typified by Ca14MnBi11 and Ba14MnBi11 show unusual magnetic behavior, but the large number (104) of atoms in the primi…
Ab Initio Investigation of Collective Charge Excitations in MgB_2
Wei Ku, W. E. Pickett, R. T. Scalettar +1
A sharp collective charge excitation is predicted in MgB at for perpendicular to the boron layers, based on an all-electron analysis of the dynamical density re…
The upper critical field problem in MgB2
S. V. Shulga, S. -L. Drechsler, H. Eschrig +2
The upper critical field Hc2(T) for MgB2 is analyzed in terms of single and multi-band Eliashberg models. The relatively high value of Hc2(0) in the range of 14 to 18 Tesla can be…
Superconductivity of MgB2: Covalent Bonds Driven Metallic
J. M. An, W. E. Pickett
A series of calculations on MgB2 and related isoelectronic systems indicates that the layer of Mg(2+) ions lowers the non-bonding B "pi" (p_z) bands relative to the bonding "sigma"…