Coupled Skyrmion sublattices in Cu(2)OSeO(3).

Autor: Langner MC; Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA., Roy S; Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA., Mishra SK; Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA., Lee JC; Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA., Shi XW; Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA., Hossain MA; Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA., Chuang YD; Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA., Seki S; RIKEN, Center for Emergent Matter Science, Wako 351-0198, Japan and PRESTO, Japan Science and Technology Agency, Tokyo 102-0075, Japan., Tokura Y; RIKEN, Center for Emergent Matter Science, Wako 351-0198, Japan and Department of Applied Physics and Quantum Phase Electronics Center, University of Tokyo, Tokyo 113-8656, Japan., Kevan SD; Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA and Department of Physics, University of Oregon, Eugene, Oregon 97401, USA., Schoenlein RW; Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
Jazyk: angličtina
Zdroj: Physical review letters [Phys Rev Lett] 2014 Apr 25; Vol. 112 (16), pp. 167202. Date of Electronic Publication: 2014 Apr 25.
DOI: 10.1103/PhysRevLett.112.167202
Abstrakt: We report the observation of a Skyrmion lattice in the chiral multiferroic insulator Cu2OSeO3 using Cu L3-edge resonant soft x-ray diffraction. We observe the unexpected existence of two distinct Skyrmion sublattices that arise from inequivalent Cu sites with chemically identical coordination numbers but different magnetically active orbitals. The Skyrmion sublattices are rotated with respect to each other, implying a long wavelength modulation of the lattice. The modulation vector is controlled with an applied magnetic field, associating this moirélike phase with a continuous phase transition. Our findings will open up a new class of science involving manipulation of quantum topological states.
Databáze: MEDLINE
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