TY - JOUR
T1 - Neutron Scattering Studies of the Breathing Pyrochlore Antiferromagnet
AU - He, Zheng
AU - Gu, Yiqing
AU - Wo, Hongliang
AU - Feng, Yu
AU - Hu, Die
AU - Hao, Yiqing
AU - Gu, Yimeng
AU - Walker, Helen C.
AU - Adroja, Devashibhai T.
AU - Zhao, Jun
N1 - Publisher Copyright:
© 2021 American Physical Society
PY - 2021/10/1
Y1 - 2021/10/1
N2 - We report neutron scattering measurements of the spinel oxide , in which magnetic ions form a breathing pyrochlore lattice. Our experiments reveal the coexistence of a nearly dispersionless resonance mode and dispersive spin-wave excitations in the magnetically ordered state, which can be quantitatively described by a quantum spin model of hexagonal loops and linear spin-wave theory with the same set of exchange parameters, respectively. Comparison to other Cr spinel oxides reveals a linear relationship between the resonance energy and lattice constant across all these materials, which is in agreement with our hexagonal loop calculations. Our results suggest a unified picture for spin resonances in Cr spinel oxides.
AB - We report neutron scattering measurements of the spinel oxide , in which magnetic ions form a breathing pyrochlore lattice. Our experiments reveal the coexistence of a nearly dispersionless resonance mode and dispersive spin-wave excitations in the magnetically ordered state, which can be quantitatively described by a quantum spin model of hexagonal loops and linear spin-wave theory with the same set of exchange parameters, respectively. Comparison to other Cr spinel oxides reveals a linear relationship between the resonance energy and lattice constant across all these materials, which is in agreement with our hexagonal loop calculations. Our results suggest a unified picture for spin resonances in Cr spinel oxides.
UR - https://www.scopus.com/pages/publications/85116624582
U2 - 10.1103/PhysRevLett.127.147205
DO - 10.1103/PhysRevLett.127.147205
M3 - Article
C2 - 34652174
AN - SCOPUS:85116624582
SN - 0031-9007
VL - 127
JO - Physical Review Letters
JF - Physical Review Letters
IS - 14
M1 - 147205
ER -