TY - JOUR
T1 - Crystal-field excitations and vibronic modes in the triangular-lattice spin-liquid candidate TbInO3
AU - Ye, Mai
AU - Xu, Xianghan
AU - Wang, Xiangyue
AU - Kim, Jaewook
AU - Cheong, Sang Wook
AU - Blumberg, Girsh
N1 - Funding Information:
We thank V. Kriyukhin, M. G. Kim, Y.-B. Li, and H.-H. Kung for discussions, and Eundeok Mun and Vivien Zapf for help with low temperature specific heat measurements at the National High Magnetic Field Laboratory and the Los Alamos National Laboratory. The spectroscopic work at Rutgers (M.Y., X.W., and G.B.) was supported by the NSF under Grants No. DMR-1709161 and No. DMR-2105001. The crystal growth and characterization (X.X., J.K., and S.-W.C.) was supported by the DOE under Grant No. DE-FG02-07ER46382. The work at NICPB was supported by the Estonian Research Council Grant No. PRG736 and the European Research Council (ERC) under Grant Agreement No. 885413.
Publisher Copyright:
© 2021 American Physical Society.
PY - 2021/8/15
Y1 - 2021/8/15
N2 - We study the ground-state properties, the electronic excitations, and lattice dynamics in spin-liquid candidate TbInO3. By employing polarization-resolved Raman spectroscopy we define the intermultiplet and intramultiplet excitations, and establish the low-energy crystal-field (CF) level scheme. In particular, we demonstrate that the ground state of the Tb3+ ions is a non-Kramers doublet, and relate the enhanced linewidth of the CF modes to the magnetic fluctuations near the spin-liquid ground state. We identify the 38 allowed Raman-active phonon modes at low temperature. Moreover, we observe hybrid vibronic excitations involving coupled CF and low-lying phonon modes, suggesting strong spin-lattice dynamics. We develop a model for vibronic states and obtain the parameters of the bare responses and coupling strength. We further demonstrate that the obtained CF level scheme is consistent with specific-heat data.
AB - We study the ground-state properties, the electronic excitations, and lattice dynamics in spin-liquid candidate TbInO3. By employing polarization-resolved Raman spectroscopy we define the intermultiplet and intramultiplet excitations, and establish the low-energy crystal-field (CF) level scheme. In particular, we demonstrate that the ground state of the Tb3+ ions is a non-Kramers doublet, and relate the enhanced linewidth of the CF modes to the magnetic fluctuations near the spin-liquid ground state. We identify the 38 allowed Raman-active phonon modes at low temperature. Moreover, we observe hybrid vibronic excitations involving coupled CF and low-lying phonon modes, suggesting strong spin-lattice dynamics. We develop a model for vibronic states and obtain the parameters of the bare responses and coupling strength. We further demonstrate that the obtained CF level scheme is consistent with specific-heat data.
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U2 - 10.1103/PhysRevB.104.085102
DO - 10.1103/PhysRevB.104.085102
M3 - Article
AN - SCOPUS:85112056038
SN - 0163-1829
VL - 104
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
IS - 8
M1 - 085102
ER -