标题： 场可调自旋无序相在三角晶格delafossite TlYbSe2中 显示英文标题

标题： Field-tunable spin disordered phase in the triangular-lattice delafossite TlYbSe2

摘要： 我们介绍了一种相对无序的受挫三角晶格化合物TlYbSe2，它属于稀土类delafossite家族——扩展了寻找基本手性量子自旋液体态的探索。 虽然直流磁化率表明磁交换相互作用在几开尔文的量级，但零场交流磁化率和比热测量在20 mK以下没有显示出长程磁序的迹象，表明存在高度受挫的量子无序基态。 高场交流磁化率揭示的相图与一大类Yb delafossites总体一致。 我们在零场下约30 mK处观察到自旋玻璃转变，我们认为这是由于自由自旋引起的。 在2-5 K之间比热测量中出现的一个宽泛异常——表明短程自旋关联——以及低温下的线性温度依赖性和低场下长程序的完全缺失，确立了TlYbSe2的低温、低场区域为探索场可调QSL行为的理想位置。 显示英文摘要

摘要： We introduce a relatively disorder-free frustrated triangular lattice compound TlYbSe2 belonging to the rare-earth delafossite family - extending the search for the quintessential chiral quantum spin liquid state. While DC magnetization suggests magnetic exchange interactions in the order of several kelvin, the zero-field AC magnetization and heat capacity measurements reveal no signs of long-range magnetic order down to 20 mK, indicating a highly frustrated quantum-disordered ground state. The high-field AC magnetization reveals a phase diagram generally consistent with a large family of Yb delafossites. We observe a spin glass transition around ~ 30 mK at zero field, which we argue is due to free spins. A broad anomaly in the heat capacity measurements between 2-5 K - indicative of short-range spin correlations - along with a linear temperature dependence at low temperatures and the complete absence of long-range order at low fields, establishes the low-temperature, low-field regime of TlYbSe2 as a prime location for exploring field-tunable QSL behavior.