Journal article
Magnetic field dependence of excitations near spin-orbital quantum criticality
- Abstract:
-
The spinel FeSc2S4 has been proposed to realize a near-critical spin-orbital singlet (SOS) state, where entangled spin and orbital moments fluctuate in a global singlet state on the verge of spin and orbital order. Here we report powder inelastic neutron scattering measurements that observe the full bandwidth of magnetic excitations and we find that spin-orbital triplon excitations of an SOS state can capture well key aspects of the spectrum in both zero and applied magnetic fields up to 8.5 T. The observed shift of low-energy spectral weight to higher energies upon increasing applied field is naturally explained by the entangled spin-orbital character of the magnetic states, a behavior that is in strong contrast to spin-only singlet ground state systems, where the spin gap decreases upon increasing applied field.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
Actions
Access Document
- Files:
-
-
(Preview, Accepted manuscript, pdf, 6.1MB, Terms of use)
-
- Publisher copy:
- 10.1103/physrevlett.118.067205
Authors
- Publisher:
- American Physical Society
- Journal:
- Physical Review Letters More from this journal
- Volume:
- 118
- Issue:
- 6
- Pages:
- 067205
- Publication date:
- 2017-02-10
- DOI:
- EISSN:
-
1079-7114
- ISSN:
-
0031-9007
- Pmid:
-
28234545
- Language:
-
English
- Keywords:
- Pubs id:
-
pubs:631543
- UUID:
-
uuid:75f70719-34db-47ff-a17f-ade4c3d4e788
- Local pid:
-
pubs:631543
- Source identifiers:
-
631543
- Deposit date:
-
2017-10-15
Terms of use
- Copyright holder:
- American Physical Society
- Copyright date:
- 2017
- Notes:
-
This is the author accepted manuscript following peer review version of the article. The final version is
available online from American Physical Society at: https://doi.org/10.1103/PhysRevLett.118.067205
If you are the owner of this record, you can report an update to it here: Report update to this record