Spin dynamics and ground-state of a 3D S=1/2 bcc quantum spin-liquid candidate

We have identified a suitable quantum spin liquid (QSL) candidate for the S=1/2 body-centered cubic lattice, where QSL phase have been recently discovered theoretically. We have characterized a polycrystalline sample of NaCa2Cu2(VO4)3 using x-ray diffraction, magnetic measurements, specific heat and polarized neutron diffraction / inelastic scattering. We now wish to confirm the QSL ground-state of NaCa2Cu2(VO4)3 down to mK temperatures and probe the spin dynamics relevant to the QSL regime in the extended region θCW/100 < T < θCW.

我们已为S=1/2体心立方晶格确定了一个合适的量子自旋液体（QSL）候选材料，该晶格的QSL相近期已在理论上被发现。我们利用X射线衍射、磁测量、比热以及极化中子衍射/非弹性散射对NaCa2Cu2(VO4)3的多晶样品进行了表征。我们现希望在低至毫开尔文（mK）的温度下确认NaCa2Cu2(VO4)3的QSL基态，并在θCW/100 < T < θCW的扩展区域内探测与QSL区域相关的自旋动力学。