Spin dynamics in the antiferromagnetic phases of the Dirac metals AMnBi2 (A = Sr, Ca)
The square Bi layers in AMnBi2 (A= Sr, Ca) host Dirac fermions which coexist with antiferromagnetic order on the Mn sublattice below TN=290 K (Sr) and 265 K (Ca). We have measured the spin-wave dispersion in these materials by triple-axis neutron spectroscopy. The spectra show pronounced spin gaps o...
| Main Authors: | , , , , , , |
|---|---|
| 格式: | Journal article |
| 出版: |
American Physical Society
2017
|