用硒取代法稳定铋基层状化合物La(O,F)Bi(S,Se)2沿c轴的Bi振动

IF 2.3 4区物理与天体物理 Q3 PHYSICS, APPLIED

Applied Physics Express Pub Date : 2023-11-10 DOI:10.35848/1882-0786/ad0ba6

Fysol Ibna Abbas, Hiroto Arima, Md. Riad Kasem, Yuto Watanabe, Takumi Hasegawa, Chul-Ho Lee, Aichi Yamashita, Yoshikazu MIZUGUCHI

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引用次数: 0

摘要

双氧水基层状化合物作为一种潜在的热电材料和非常规超导材料得到了广泛的研究。对于这两种功能，面内化学压力效应改善了它们的热电或超导性能。在这项研究中，我们通过分析热电LaOBi(S,Se)2和超导LaO0.5F0.5Bi(S,Se)2的多重Debye和Einstein模型在T = 1.9-300 K下测量的晶格比热，研究了面内化学压力对Bi原子振动的影响。我们发现平面内化学压力增加了两个系统中沿c轴的大振幅Bi振动所对应的爱因斯坦模的振子数。

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Stabilization of Bi vibration along c-axis in BiS2-based layered compounds La(O,F)Bi(S,Se)2 by Se substitution

Abstract BiCh2-based layered compounds have been extensively studied as potential thermoelectric and unconventional superconducting materials. For both functionalities, in-plane chemical pressure effects improve their thermoelectric or superconducting properties. In this study, we investigate the effects of in-plane chemical pressure on atomic vibrations of Bi by analyzing lattice specific heat measured at T = 1.9–300 K with multiple Debye and Einstein models for thermoelectric LaOBi(S,Se)2 and superconducting LaO0.5F0.5Bi(S,Se)2. We reveal that in-plane chemical pressure enhances the oscillator number of the Einstein mode corresponding to large-amplitude Bi vibration along the c-axis in both the systems.

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来源期刊

Applied Physics Express 物理-物理：应用

CiteScore

4.80

自引率

8.70%

发文量

310

审稿时长

1.2 months

期刊介绍： Applied Physics Express (APEX) is a letters journal devoted solely to rapid dissemination of up-to-date and concise reports on new findings in applied physics. The motto of APEX is high scientific quality and prompt publication. APEX is a sister journal of the Japanese Journal of Applied Physics (JJAP) and is published by IOP Publishing Ltd on behalf of the Japan Society of Applied Physics (JSAP).