A New Superconductor Parent Compound NaMn_(6)Bi_(5) with Quasi-One-Dimensional Structure and Lower Antiferromagnetic-Like Transition Temperatures

周颖; 陈龙; 王刚; 王郁欣; 王志川; 柴聪聪; 郭中楠; 胡江平; 陈小龙

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A New Superconductor Parent Compound NaMn_(6)Bi_(5) with Quasi-One-Dimensional Structure and Lower Antiferromagnetic-Like Transition Temperatures

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Mn-based superconductors are very rare and their superconductivity has only been reported in three-dimensional Mn P and quasi-one-dimensional KMn_(6)Bi_(5) and Rb Mn_(6)Bi_(5) with[Mn_(6)Bi_(5)]-columns under high pressures.Here we report the synthesis,magnetism,electrical resistivity,and specific heat capacity of the newly discovered quasione-dimensional Na Mn_(6)Bi_(5).Compared with other AMn_(6)Bi_(5)(A=K,Rb,and Cs),Na Mn_(6)Bi_(5) has abnormal Bi–Bi bond lengths and two antiferromagnetic-like transitions at 47.3 K and 51.8 K.Anisotropic resistivity and low-temperature non-Fermi liquid behavior are observed.Heat capacity measurement reveals that the Sommerfeld coefficient for Na Mn_(6)Bi_(5) is unusually large.Using first-principles calculations,an unusual enhancement of density of states near the Fermi level is demonstrated for Na Mn_(6)Bi_(5).The features make Na Mn_(6)Bi_(5) a more suitable platform to explore the interplay of magnetism and superconductivity.

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《中国物理快报：英文版》 |2022年第4期|47-53|共7页
作者
周颖; 陈龙; 王刚; 王郁欣; 王志川; 柴聪聪; 郭中楠; 胡江平; 陈小龙;
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作者单位

Beijing National Laboratory for Condensed Matter Physics;

Institute of Physics;

Chinese Academy of Sciences;

Beijing 100190;

China;

University of Chinese Academy of Sciences;

Beijing 100049;

China;

Songshan Lake Materials Laboratory;

Dongguan 523808;

China;

Department of Chemistry;

School of Chemistry and Biological Engineering;

University of Science and Technology Beijing;

Beijing 100083;

China;

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原文格式 PDF
正文语种 chi
中图分类凝聚态物理学;
关键词
Fermi; resistivity; unusual;

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A New Superconductor Parent Compound NaMn_(6)Bi_(5) with Quasi-One-Dimensional Structure and Lower Antiferromagnetic-Like Transition Temperatures

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