拓扑半金属候选材料 LaxSr1-xMnSb2 中的可调谐量子输运

IF 1.8 4区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

EPL Pub Date : 2024-09-12 DOI:10.1209/0295-5075/ad7286

Jiangpeng Song, Junbo Li and Zan Du

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引用次数: 0

摘要

磁性半金属 SrMnSb2 包含一种非非晶态晶体对称性，可以保护狄拉克交叉，从而在块状单晶中实现准二维特性、磁秩序和非三维拓扑的共存。在这里，我们通过探测 LaxSr1-xMnSb2 单晶中的量子振荡，报告了费米面的演变。霍尔测量结果表明，掺入 La 后，传导过程从空穴主导的多波段性质转变为单个空穴波段性质。与母体-SrMnSb2 相比，掺 La 晶体中与 Fα 相对应的费米面略有扩大，而与 Fγ 相对应的小费米面则出现了可调谐的特征。拓扑半金属候选物 LaxSr1-xMnSb2 为未来的潜在应用提供了一个微调平台。

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Tunable quantum transport in topological semimetal candidates LaxSr1-xMnSb2

The magnetic semimetal SrMnSb2 contains a nonsymmorphic crystal symmetry that could protect Dirac crossings, offering the coexistence of a quasi-two-dimensional characteristic, magnetic order and nontrivial topology in bulk single crystals. Here, we report the evolution of Fermi surfaces by probing quantum oscillations in the LaxSr1-xMnSb2 single crystals. Hall measurements reveal that the conduction process changes from a hole-dominated multiband nature to a single hole-band nature after La doping. Compared with parent-SrMnSb2, the Fermi surface corresponding to Fα is slightly enlarged and the small Fermi surface corresponding to Fγ appears with a tunable feature in La-doped crystals. The topological semimetal candidates LaxSr1-xMnSb2 provide a fine-tuning platform for potential applications in the future.

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来源期刊

EPL 物理-物理：综合

CiteScore

3.30

自引率

5.60%

发文量

332

审稿时长

1.9 months

期刊介绍： General physics – physics of elementary particles and fields – nuclear physics – atomic, molecular and optical physics – classical areas of phenomenology – physics of gases, plasmas and electrical discharges – condensed matter – cross-disciplinary physics and related areas of science and technology. Letters submitted to EPL should contain new results, ideas, concepts, experimental methods, theoretical treatments, including those with application potential and be of broad interest and importance to one or several sections of the physics community. The presentation should satisfy the specialist, yet remain understandable to the researchers in other fields through a suitable, clearly written introduction and conclusion (if appropriate). EPL also publishes Comments on Letters previously published in the Journal.