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Screening Promising CsV3Sb5-Like Kagome Materials from Systematic First-Principles Evaluation 下载免费PDF全文
The Cs V3Sb5 kagome lattice holds the promise for manifesting electron correlation,topology and superconductivity.However,by far only three Cs V3Sb5-like kagome materials have been experimentally spotted.We enlarge this family of materials to 1386 compounds via element species substitution,and the further screening process suggests that 28 promising candidates have superior thermodynamic stability,hence they are highly likely to be synthesizable.Moreov... 相似文献
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A density-wave-like transition in the polycrystalline V3Sb2 sample with bilayer kagome lattice 下载免费PDF全文
王宁宁 顾雨豪 M.A.McGuire Jiaqiang Yan 石利粉 崔琦 陈科宇 王郁欣 张华 杨槐馨 董晓莉 蒋坤 胡江平 王铂森 孙建平 程金光 《中国物理 B》2022,31(1):17106-017106
Recently,transition-metal-based kagome metals have aroused much research interest as a novel platform to explore exotic topological quantum phenomena.Here we report on the synthesis,structure,and physical properties of a bilayer kagome lattice compound V3Sb2.The polycrystalline V3Sb2 samples were synthesized by conventional solid-state-reaction method in a sealed quartz tube at temperatures below 850℃.Measurements of magnetic susceptibility and resistivity revealed consistently a density-wave-like transition at Tdw≈160 K with a large thermal hysteresis,even though some sample-dependent behaviors were observed presumably due to the different preparation conditions.Upon cooling through Tdw,no strong anomaly in lattice parameters and no indication of symmetry lowering were detected in powder x-ray diffraction measurements.This transition can be suppressed completely by applying hydrostatic pressures of about 1.8 GPa,around which no sign of superconductivity was observed down to 1.5 K.Specific-heat measurements revealed a relatively large Sommerfeld coefficientγ=18.5 mJ·mol-1·K-2,confirming the metallic ground state with moderate electronic correlations.Density functional theory calculations indicate that V3Sb2 shows a non-trivial topological crystalline property.Thus,our study makes V3Sb2 a new candidate of metallic kagome compound to study the interplay between density-wave-order,nontrivial band topology,and possible superconductivity. 相似文献
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A New Superconductor Parent Compound NaMn6Bi5 with Quasi-One-Dimensional Structure and Lower Antiferromagnetic-Like Transition Temperatures 下载免费PDF全文
Mn-based superconductors are very rare and their superconductivity has only been reported in three-dimensional Mn P and quasi-one-dimensional KMn6Bi5 and Rb Mn6Bi5 with[Mn6Bi5]-columns under high pressures.Here we report the synthesis,magnetism,electrical resistivity,and specific heat capacity of the newly discovered quasione-dimensional Na Mn6Bi5.Compared with other AMn6Bi5 (... 相似文献
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王渊 刘以轩 郝占阳 程文静 邓竣泽 王郁欣 顾雨豪 马小明 戎洪涛 张发远 郭抒 张成成 江志诚 杨逸尘 刘万领 姜琦 刘正太 叶茂 沈大伟 刘毅 崔胜涛 王乐 刘才 林君浩 刘影 蔡永青 朱金龙 陈朝宇 梅佳伟 《中国物理快报》2023,(3):43-51
The simple kagome-lattice band structure possesses Dirac cones, flat band, and saddle point with van Hove singularities in the electronic density of states, facilitating the emergence of various electronic orders. Here we report a titanium-based kagome metal CsTi3Bi5 where titanium atoms form a kagome network, resembling its isostructural compound CsV3Sb5. Thermodynamic properties including the magnetization, resistance, and heat capacity reveal the co... 相似文献
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