Anup Pradhan Sakhya, Brenden R. Ortiz, Barun Ghosh, Milo Sprague, Mazharul Islam Mondal, Matthew Matzelle, Iftakhar Bin Elius, Nathan Valadez, David G. Mandrus, Arun Bansil, Madhab Neupane
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引用次数: 0
摘要
卡戈米晶格已成为探索材料中奇异量子现象的理想平台。在此,我们报告了钛基卡戈米金属 YbTi3Bi4 的发现,并结合密度泛函理论计算,使用角度分辨光发射光谱(ARPES)和磁传输对其进行了表征。我们的 ARPES 结果揭示了 YbTi3Bi4 的复杂费米学,并提供了四个平坦带的光谱证据。我们的测量结果还显示,在 $$overline\,{mbox{K}}\,}$ 点存在多个源于 Ti 3d 轨道的范霍夫奇点和线性弥散的间隙狄拉克样体态,这与我们的理论计算结果一致。我们的研究将 YbTi3Bi4 树立为探索更广泛的 LnTi3Bi4(Ln = 镧系元素)材料家族中奇异相的平台。卡戈米晶格已成为探索材料中奇异量子现象的理想平台。本文报告了钛基卡戈米金属 YbTi3Bi4 的发现,其光谱显示了源自镱 4f 和钛 3d 轨道的四条平带、多个范霍夫奇点以及线性弥散的间隙狄拉克样体态。
Diverse electronic landscape of the kagome metal YbTi3Bi4
Kagome lattices have emerged as an ideal platform for exploring exotic quantum phenomena in materials. Here, we report the discovery of Ti-based kagome metal YbTi3Bi4 which we characterize using angle-resolved photoemission spectroscopy (ARPES) and magneto-transport, in combination with density functional theory calculations. Our ARPES results reveal the complex fermiology of YbTi3Bi4 and provide spectroscopic evidence of four flat bands. Our measurements also show the presence of multiple van Hove singularities originating from Ti 3d orbitals and a linearly-dispersing gapped Dirac-like bulk state at the $$\overline{\,{\mbox{K}}\,}$$ point in accord with our theoretical calculations. Our study establishes YbTi3Bi4 as a platform for exploring exotic phases in the wider LnTi3Bi4 (Ln = lanthanide) family of materials. Kagome lattices have emerged as an ideal platform for exploring exotic quantum phenomena in materials. Here, the discovery of a Ti-based kagome metal YbTi3Bi4 is reported, showing spectroscopic evidence of four flat bands originating from both Yb 4f and Ti 3d orbitals, multiple van Hove singularities, and a linearly dispersing gapped Dirac-like bulk state.
期刊介绍:
Communications Materials, a selective open access journal within Nature Portfolio, is dedicated to publishing top-tier research, reviews, and commentary across all facets of materials science. The journal showcases significant advancements in specialized research areas, encompassing both fundamental and applied studies. Serving as an open access option for materials sciences, Communications Materials applies less stringent criteria for impact and significance compared to Nature-branded journals, including Nature Communications.