标题： 场可调的三角晶格反铁磁体TlYbSe2中的量子无序基态 显示英文标题

标题： Field-tunable quantum disordered ground state in the triangular-lattice antiferromagnet TlYbSe2

摘要： 我们介绍了属于稀土delafossite家族的三角晶格反铁磁体TlYbSe2，其具有相对无缺陷的受挫三角晶格——扩展了寻找典型手性量子自旋液体状态的探索。 虽然直流磁化率表明磁交换相互作用在几个开尔文量级，但零场交流磁化率和比热测量在20 mK以下未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大量Yb delafossites家族总体一致。 我们在零场下约35 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宽峰——表明短程自旋关联——以及低温下的线性温度依赖性，以及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 the triangular-lattice antiferromagnet TlYbSe2 belonging to the rare-earth delafossite family with a relatively disorder-free frustrated triangular lattice - 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 35 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.