201 citations · 536 across the 8 of their papers we have counts for
17 papers
Composite domain walls in flat nanomagnets: the magnetostatic limit
H. Youk, G. -W. Chern, K. Merit +2
We discuss the structure of the so-called "vortex" domain walls in soft magnetic nanoparticles. A wall of this kind is a composite object consisting of three elementary topological…
Topological defects in flat nanomagnets: the magnetostatic limit
G. -W. Chern, H. Youk, O. Tchernyshyov
We discuss elementary topological defects in soft magnetic nanoparticles in the thin-film geometry. In the limit dominated by magnetostatic forces the low-energy defects are vortic…
Fractional vortices and composite domain walls in flat nanomagnets
Oleg Tchernyshyov, Gia-Wei Chern
We provide a simple explanation of complex magnetic patterns observed in ferromagnetic nanostructures. To this end we identify elementary topological defects in the field of magnet…
Flux expulsion and greedy bosons: frustrated magnets at large N
O. Tchernyshyov, R. Moessner, S. L. Sondhi
We investigate the Sp(N) mean-field theory for frustrated quantum magnets. First, we establish some general properties of its solutions; in particular, for small spin we propose si…
Structural, orbital, and magnetic order in vanadium spinels
O. Tchernyshyov
Vanadium spinels (ZnV_2O_4, MgV_2O_4, and CdV_2O_4) exhibit a sequence of structural and magnetic phase transitions, reflecting the interplay of lattice, orbital, and spin degrees…
Valence-bond crystal in a {111} slice of the pyrochlore antiferromagnet
Oleg Tchernyshyov, Hong Yao, R. Moessner
We investigate theoretically the ordering effect of quantum spin fluctuations in a Heisenberg antiferromagnet on a two-dimensional network of corner sharing tetrahedra. This networ…