Field and Polarization Dependent Quantum Spin Dynamics in Honeycomb Magnet Na$_2$Co$_2$TeO$_6$: Magnetic Excitations and Continuum

Patrick Pilch; Laur Peedu; Anup Kumar Bera; S. M. Yusuf; Urmas Nagel; Toomas Rõõm; Zhe Wang

doi:10.1103/PhysRevB.108.L140406

Field and Polarization Dependent Quantum Spin Dynamics in Honeycomb Magnet Na$_2$Co$_2$TeO$_6$: Magnetic Excitations and Continuum

Strongly Correlated Electrons 2023-10-12 v2 Materials Science

Authors: Patrick Pilch , Laur Peedu , Anup Kumar Bera , S. M. Yusuf , Urmas Nagel , Toomas Rõõm , Zhe Wang

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Abstract

We report terahertz spectroscopic measurements of quantum spin dynamics in the spin-1/2 honeycomb magnet Na $_2$ Co $_2$ TeO $_6$ as a function of applied magnetic field with different terahertz polarizations. Distinct field dependencies of the resolved spin dynamics are identified in three regimes, which are separated by two critical fields at $B_{c1}\approx 7$ and $B_{c2}\approx 10$ T. A polarization selective continuum is observed in the intermediate phase, featuring spin fluctuations of a proximate quantum spin liquid.

Keywords

quantum spin dynamics honeycomb magnet terahertz spectroscopy magnetic field dependence polarization spin liquid magnetic excitations

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@article{arxiv.2308.00631,
  title  = {Field and Polarization Dependent Quantum Spin Dynamics in Honeycomb Magnet Na$_2$Co$_2$TeO$_6$: Magnetic Excitations and Continuum},
  author = {Patrick Pilch and Laur Peedu and Anup Kumar Bera and S. M. Yusuf and Urmas Nagel and Toomas Rõõm and Zhe Wang},
  journal= {arXiv preprint arXiv:2308.00631},
  year   = {2023}
}

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6 pages, 4 figures

Field and Polarization Dependent Quantum Spin Dynamics in Honeycomb Magnet Na$_2$Co$_2$TeO$_6$: Magnetic Excitations and Continuum

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