Magnetic field effect on low-energy spin excitations in a novel quantum spin liquid candidate

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We plan to study the effect of magnetic field on the spin excitations in the newly discovered quantum spin liquid Na2BaCo(PO4)2. Our preliminary inelastic neutron scattering measurements on the powder sample reveals that the spin-excitation is continuum-type at base T (1K) without external field, with band-width in the order of 0.1 to 0.2 meV. With a large enough field above the critical value (Hc ~ 2T), the energy of the spin excitations is lifted. Most...
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