发表机构
Lanzhou University（兰州大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文基于大-N平均场方法，发展Kondo晶格中Kondo杂化波序的微观理论，系统识别稳定调制相，解释UTe2和1T/1H-TaS2实验观测，并预测电导率各向异性作为输运指纹。
AI 中文摘要
最近的扫描隧道显微镜实验在重费米子超导体UTe$_2$和人工Kondo晶格体系1T/1H-TaS$_2$中发现了涌现的空间调制的Kondo杂化波（KHW）序，挑战了重费米子物理中Kondo杂化空间均匀的传统范式。在此，我们基于大-$N$费米子平均场近似下的典型方格Kondo晶格模型，发展了KHW序的微观理论。我们系统地识别了稳定的调制KHW相，并建立了其基态相图。显著的$\boldsymbol{Q}=(0,\pi)$ KHW相产生了Kondo杂化能隙的单轴条纹调制，忠实地再现了UTe$_2$中观测到的空间调制图案。此外，其固有的晶胞加倍调制精确解释了1T/1H-TaS$_2$中测量的光谱特征。我们进一步预测了特征的面内电导率各向异性，作为区分具有不同有序波矢的KHW态的确定性输运指纹。我们的工作为新观测到的KHW序提供了微观基础，并为理解重费米子材料中涌现的调制杂化现象建立了统一的理论框架。
英文摘要
Recent scanning tunneling microscopy experiments have discovered emergent spatially modulated Kondo hybridization wave (KHW) order in the heavy fermion superconductor UTe$_2$ and the artificial Kondo lattice system 1T/1H-TaS$_2$, challenging the conventional paradigm of spatially uniform Kondo hybridization in heavy fermion physics. Here, we develop a microscopic theory for KHW order based on the canonical square-lattice Kondo lattice model within the large-$N$ fermionic mean-field approximation. We systematically identify stable modulated KHW phases and establish their ground-state phase diagram. The prominent $\boldsymbol{Q}=(0,π)$ KHW phase yields uniaxial stripe modulation of the Kondo hybridization gap, which faithfully reproduces the spatial modulation pattern observed in UTe$_2$. Moreover, its inherent unit-cell-doubling modulation precisely accounts for the spectroscopic features measured in 1T/1H-TaS$_2$. We further predict a characteristic in-plane conductivity anisotropy that serves as a definitive transport fingerprint to discriminate KHW states with distinct ordering wavevectors. Our work provides a microscopic foundation for the newly observed KHW order and establishes a unified theoretical framework for understanding emergent modulated hybridization phenomena in heavy fermion materials.
Comments6+8 pages,6+5 figures,comments are welcome!
