Effect of magnetic ordering on the phonons of Co3Sn2S2: Temperature-dependent Raman study

IF 2.8 3区物理与天体物理 Q2 PHYSICS, CONDENSED MATTER

Physica B-condensed Matter Pub Date : 2025-04-30 DOI:10.1016/j.physb.2025.417276

Sahil Rathi , Kapil Kumar , V.P.S. Awana , Satyendra Nath Gupta

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引用次数: 0

Abstract

_{3}

_{2}

_{2}

is a magnetic Weyl semimetal with a magnetic phase transition at

\approx

170 K. Here, we report the effect of this magnetic phase transition on the lattice vibration and electron–phonon coupling of Co

_{3}

_{2}

_{2}

using temperature dependent Raman scattering in the temperature range from 7 K to 300 K. The intensities of E

_{g}

and A

_{1 g}

phonons decrease as temperature is increased till the magnetic transition temperature (170 K) and exhibit no temperature dependence above the transition temperature. Further, the E

_{g}

phonon exhibit much stronger temperature dependence than A

_{1 g}

phonon in the magnetic phase. The frequencies and line widths of E

_{g}

and A

_{1 g}

modes also exhibit anomalous behavior above the magnetic transition temperature. We have used spin dependent phonon scattering model to understand these anomalies in phonon frequencies, line widths and intensities.

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磁有序对Co3Sn2S2声子的影响：温度相关的拉曼研究

Co3Sn2S2是一种磁性Weyl半金属，在≈170 K时发生磁相变。在这里，我们利用温度相关的拉曼散射，在7 K到300 K的温度范围内报告了这种磁相变对Co3Sn2S2晶格振动和电子-声子耦合的影响。Eg和A1g声子强度随着温度的升高而降低，直到磁转变温度（170 K），并且在转变温度以上没有温度依赖性。此外，Eg声子在磁相中表现出比A1g声子更强的温度依赖性。Eg和A1g模式的频率和线宽在磁转变温度以上也表现出异常行为。我们使用自旋相关声子散射模型来理解这些声子频率、线宽和强度的异常。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physica B-condensed Matter 物理-物理：凝聚态物理

CiteScore

4.90

自引率

7.10%

发文量

703

审稿时长

44 days

期刊介绍： Physica B: Condensed Matter comprises all condensed matter and material physics that involve theoretical, computational and experimental work. Papers should contain further developments and a proper discussion on the physics of experimental or theoretical results in one of the following areas: -Magnetism -Materials physics -Nanostructures and nanomaterials -Optics and optical materials -Quantum materials -Semiconductors -Strongly correlated systems -Superconductivity -Surfaces and interfaces