Orbital-selective metallicity in the valence-bond liquid phase of Li2RuO3
Orbital-selective metallicity in the valence-bond liquid phase of Li2RuO3
复制标题
Li2RuO3 价键液相中的轨道选择性金属丰度
DOI：
10.1103/physrevb.105.245148
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发表时间：
2022
影响因子：
3.7
通讯作者：
Qazilbash, M. Mumtaz
中科院分区：
文献类型：
--
作者：
McArdle, Patrick;Huang, Fei-Ting;Yang, Junjie;Chu, Ming-Wen;Cheong, Sang-Wook;Qazilbash, M. Mumtaz
(LRO)在室温下形成价键晶体。它经历了高温相变，包括结构、磁性和电子变化，导致了奇异的价键液体状态。轨道自由度被认为是LRO性质在相变过程中演化的基础。我们报道了LRO单晶的随温度变化的宽带反射率测量，以阐明其结构和输运性质。具体地，通过相变研究了LRO的声子和电子性质。我们报道，在转变温度以上，理论轨道中的电子的光学带隙关闭，但电子仍保持带隙。高温下的这种行为可能与轨道选择性金属态有关，据我们所知，这种金属态以前没有在LRO中报道过。
(LRO) forms a valence bond crystal at room temperature. It undergoes a high temperature phase transition that involves structural, magnetic, and electronic changes leading to an exotic valence bond liquid state. The orbital degrees of freedom are thought to be fundamental to the evolution of LRO properties across the phase transition. We report temperature dependent broadbandreflectance measurements on single crystals of LRO to elucidate structural and transport properties. Specifically, the phonon and electronic properties of LRO were investigated through the phase transition. We report that above the transition temperature, the optical band gap closes for electrons in theorbitals, but theelectrons remain gapped. This behavior at high temperature can be associated with an orbital selective metallic state which to our knowledge has not been previously reported in LRO.