54 citations · 73 across the 2 of their papers we have counts for
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cond-mat.mtrl-sci2006★ 54 cited
SrCu(PO): A real material realization of the 1D nearest neighbor Heisenberg chain
M. D. Johannes, J. Richter, S. -L. Drechsler +1
We present evidence that crystalline Sr_2Cu(PO_4)_2 is a nearly perfect one-dimensional (1D) spin-1/2 anti-ferromagnetic Heisenberg model (AHM) chain compound with nearest neighbor…
cond-mat.mtrl-sci2006★ 19 cited
Formation of an unconventional Ag valence state in Ag2NiO2
M. D. Johannes, S. Streltsov, I. I. Mazin +1
The Ag ion in the recently synthesized novel material Ag2NiO2 adopts an extremely unusual valency of 1/2, leaving the Ni ion as 3+, rather than the expected 2+. Using first princip…
cond-mat.mtrl-sci2005
Magnetic Coupling Between Non-Magnetic Ions: Eu3+ in EuN and EuP
M. D. Johannes, W. E. Pickett
We consider the electronic structure of, and magnetic exchange (spin) interactions between, nominally nonmagnetic Eu^3+ ions (4f^6, S=3, L=3, J=0) within the context of the rocksal…