Khaetskii Alexander, Juričič Vladimir, Balatsky Alexander V
Department of Physics, University of Connecticut, Storrs, CT 06269, United States of America.
Nordita, KTH Royal Institute of Technology and Stockholm University, Roslagstullsbacken 23, SE-106 91 Stockholm, Sweden.
J Phys Condens Matter. 2020 Oct 28;33(4). doi: 10.1088/1361-648X/abbb0f.
Entanglement of two different quantum orders is of an interest of the modern condensed matter physics. One of the examples is the dynamical multiferroicity, where fluctuations of electric dipoles lead to magnetization. We investigate this effect at finite temperature and demonstrate an elevated magnetic response of a ferroelectric near the ferroelectric quantum critical point (FE QCP). We calculate the magnetic susceptibility of a bulk sample on the paraelectric side of the FE QCP at finite temperature and find enhanced magnetic susceptibility near the FE QCP. We propose quantum paraelectric strontium titanate as a candidate material to search for dynamic multiferroicity. We estimate the magnitude of the magnetic susceptibility for this material and find that it is detectable experimentally.
两种不同量子序的纠缠是现代凝聚态物理所关注的。其中一个例子是动态多铁性，即电偶极子的涨落导致磁化。我们在有限温度下研究了这种效应，并证明了在铁电量子临界点（FE QCP）附近铁电体的磁响应增强。我们计算了有限温度下FE QCP顺电侧大块样品的磁化率，发现在FE QCP附近磁化率增强。我们提出量子顺电体钛酸锶作为寻找动态多铁性的候选材料。我们估计了这种材料的磁化率大小，发现它在实验上是可检测的。
