Possible quantum spin liquid phase in the S=1/2 frustrated cubic lattice Y3Cu2Sb3O14

We have identified a new Cu-based system, Y3Cu2Sb3O14 which appears to have a geometrically frustrated 3D network of S=1/2 Cu2+ ions. Our measurements suggest a lack of magnetic order down to 2 K in Y3Cu2Sb3O14 in spite of an antiferromagnetic Curie Weiss temperature, θCW = -17.6 K. For temperatures above 2 K, our ac susceptibility, and magnetization data obey temperature-magnetic field scaling, indicative of the formation of 3D random singlets/ Quantum spin liquids (QSL) phase. Through μSR, we propose to explore the spin dynamics at low T in the above compound to look for evidence of QSL behavior. We propose zero-field and longitudinal-field μSR measurements in the temperature range of 50 mK to 100 K to achieve our objectives.

我们鉴定出一种新型铜基体系Y₃Cu₂Sb₃O₁₄，该体系呈现出由自旋S=1/2的Cu²⁺离子构成的几何阻挫三维网络。尽管该体系的反铁磁居里-外斯温度θ_CW = -17.6 K，我们的测量结果显示，在低至2 K的温度范围内，Y₃Cu₂Sb₃O₁₄未表现出任何磁有序。在温度高于2 K时，我们测得的交流磁化率与磁化强度数据符合温度-磁场标度律，这表明体系形成了三维随机单态/量子自旋液体（Quantum Spin Liquids, QSL）相。为搜寻该体系量子自旋液体行为的相关实验证据，我们提议借助μ子自旋共振（μSR）技术，探究上述化合物在低温下的自旋动力学行为。为达成本研究目标，我们计划在50 mK至100 K的温度区间内开展零场与纵向场μSR测量。

搜集汇总

背景与挑战

背景概述

该数据集研究了Y3Cu2Sb3O14材料中的量子自旋液体行为，实验数据显示在2K以下无磁序存在，且符合温度-磁场缩放规律。数据集包含μ子自旋弛豫（μSR）测量数据，旨在探索低温下的自旋动力学和量子自旋液体证据。