NMR study of the spin excitations in the frustrated antiferromagnet Yb(BaBO$_3$)$_3$ with a triangular lattice

K. Y. Zeng; Long Ma; Y. X. Gao; Z. M. Tian; L. S. Ling; Li Pi

doi:10.1103/PhysRevB.102.045149

NMR study of the spin excitations in the frustrated antiferromagnet Yb(BaBO$_3$)$_3$ with a triangular lattice

Strongly Correlated Electrons 2020-08-03 v2 Materials Science

Authors: K. Y. Zeng , Long Ma , Y. X. Gao , Z. M. Tian , L. S. Ling , Li Pi

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Abstract

In this paper, we study the spin excitation properties of the frustrated triangular-lattice antiferromagnet Yb(BaBO $_3$ ) $_3$ with nuclear magnetic resonance. From the spectral analysis, neither magnetic ordering nor spin freezing is observed with temperature down to $T=0.26$ K, far below its Curie-Weiss temperature $|\theta_w|\sim2.3$ K. From the nuclear relaxation measurement, precise temperature-independent spin-lattice relaxation rates are observed at low temperatures under a weak magnetic field, indicating the gapless spin excitations. Further increasing the field intensity, we observe a spin excitation gap with the gap size proportional to the field intensity. These phenomena suggest a very unusual strongly correlated quantum disordered phase, and the implications for the quantum spin liquid state are further discussed.

Keywords

nmr frustrated antiferromagnet triangular lattice spin excitations quantum spin liquid yb(bab o3)3

Cite

@article{arxiv.1912.03814,
  title  = {NMR study of the spin excitations in the frustrated antiferromagnet Yb(BaBO$_3$)$_3$ with a triangular lattice},
  author = {K. Y. Zeng and Long Ma and Y. X. Gao and Z. M. Tian and L. S. Ling and Li Pi},
  journal= {arXiv preprint arXiv:1912.03814},
  year   = {2020}
}

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6 pages, 6 figures. Supplemental materials available upon request

NMR study of the spin excitations in the frustrated antiferromagnet Yb(BaBO$_3$)$_3$ with a triangular lattice

Abstract

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