Thermodynamic properties of Ba 2 CoSi 2 O 6 Cl 2 in a strong magnetic field: Realization of flat-band physics in a highly frustrated quantum magnet

Thermodynamic properties of Ba 2 CoSi 2 O 6 Cl 2 in a strong magnetic field: Realization of flat-band physics in a highly frustrated quantum magnet
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Ba 2 CoSi 2 O 6 Cl 2 在强磁场中的热力学性质:在高度受抑量子磁体中实现平带物理

DOI:
10.1103/physrevb.97.024405
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发表时间:
2018
期刊:
影响因子:
3.7
通讯作者:
Oleg Derzhko
Oleg Derzhko
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Johannes Richter;Olesia Krupnitska;Vasyl Baliha;Taras Krokhmalskii;Oleg Derzhko

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寻找平带固态实现是验证或挑战量子多体平带系统理论预测的关键问题。对于受挫量子磁体,平带会导致与局部多磁振子态的存在相关的各种非常规特性。最近合成的磁性化合物似乎是在实验中观察这些特征的几乎完美的候选者。我们通过将局域磁振子概念应用于这种化合物来发展一种理论。我们首先表明我们的理论描述了已知的实验事实,然后我们提出了新的实验研究来检测与低温下局域磁振子的维格纳晶体状有序相关的场驱动相变。
The search for flat-band solid-state realizations is a crucial issue to verify or to challenge theoretical predictions for quantum many-body flat-band systems. For frustrated quantum magnets flat bands lead to various unconventional properties related to the existence of localized many-magnon states. The recently synthesized magnetic compoundseems to be an almost perfect candidate to observe these features in experiments. We develop a theory forby adapting the localized-magnon concept to this compound. We first show that our theory describes the known experimental facts and then we propose new experimental studies to detect a field-driven phase transition related to a Wigner-crystal-like ordering of localized magnons at low temperatures.
DOI: 10.1103/physrevb.74.144430
发表时间: 2006
期刊: Physical Review B
影响因子: 3.7
作者:
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