M. Johannes

activity

20012025

most citedMicroscopic origin of magnetism and magnetic interactions in ferropnictides

163 citations · 897 across the 15 of their papers we have counts for

collaborators

Showing 2006Show all

2 papers · 1 filter

cond-mat.mtrl-sci2006★ 54 cited

Sr $_{2}$ Cu(PO $_{4}$ ) $_{2}$ : 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…

Sr2​Cu(PO4​)2​: A real material realization of the 1D nearest neighbor Heisenberg chain

Formation of an unconventional Ag valence state in Ag2NiO2

Sr $_{2}$ Cu(PO $_{4}$ ) $_{2}$ : A real material realization of the 1D nearest neighbor Heisenberg chain