Back to Search
Start Over
Van Hove singularity in the magnon spectrum of the antiferromagnetic quantum honeycomb lattice
- Source :
- Nature Communications, Vol 12, Iss 1, Pp 1-8 (2021), Nature Communications
- Publication Year :
- 2021
- Publisher :
- Nature Portfolio, 2021.
-
Abstract
- In quantum magnets, magnetic moments fluctuate heavily and are strongly entangled with each other, a fundamental distinction from classical magnetism. Here, with inelastic neutron scattering measurements, we probe the spin correlations of the honeycomb lattice quantum magnet YbCl3. A linear spin wave theory with a single Heisenberg interaction on the honeycomb lattice, including both transverse and longitudinal channels of the neutron response, reproduces all of the key features in the spectrum. In particular, we identify a Van Hove singularity, a clearly observable sharp feature within a continuum response. The demonstration of such a Van Hove singularity in a two-magnon continuum is important as a confirmation of broadly held notions of continua in quantum magnetism and additionally because analogous features in two-spinon continua could be used to distinguish quantum spin liquids from merely disordered systems. These results establish YbCl3 as a benchmark material for quantum magnetism on the honeycomb lattice.<br />Honeycomb lattices with interacting spins can host rich magnetic behaviour; however, typically features are complicated by additional interactions. Here, the authors perform neutron scattering on YbCl3, which exhibits near perfect two-dimensional magnetism, providing a benchmark for other materials.
- Subjects :
- Magnetism
Quantum fluids and solids
Science
Van Hove singularity
General Physics and Astronomy
02 engineering and technology
Neutron scattering
01 natural sciences
General Biochemistry, Genetics and Molecular Biology
Article
Spin wave
Magnetic properties and materials
0103 physical sciences
Antiferromagnetism
010306 general physics
Spin (physics)
Physics
Multidisciplinary
Condensed matter physics
Magnon
Honeycomb (geometry)
General Chemistry
021001 nanoscience & nanotechnology
Condensed Matter::Strongly Correlated Electrons
0210 nano-technology
Subjects
Details
- Language :
- English
- ISSN :
- 20411723
- Volume :
- 12
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- Nature Communications
- Accession number :
- edsair.doi.dedup.....0b5ed44f5201662345b8d1fc6dfe7602