Inelastic neutron scattering experiments under magnetic field were performed on the one-dimensional quantum antiferromagnet Yb4As 3. When a magnetic field is applied perpendicular to the Yb3+ chain, the material exhibits a gap-opening phenomenon due to the induced staggered field originated from the Dzyaloshinsky-Moriya interaction. It was confirmed that the spectrum remains gapless when a magnetic field is applied parallel to the Yb3+ chain. Clear evidence for the incommensurate mode which is predicted by the theories was found.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering