arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.12996cond-mat.str-elcond-mat.mtrl-sci
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ZrTe5中准量子化霍尔效应的起源

Origin of the quasi-quantized Hall effect in ZrTe5

Stanislaw Galeski, Toni Ehmcke, Rafal Wawrzynczak, Pedro Mercado Lozano, Kyungjune Cho, Ankit Sharma, Souvik Das, Felix Kuster, Paolo Sessi, Manuel Brando, Robe… 展开作者

Stanislaw Galeski, Toni Ehmcke, Rafal Wawrzynczak, Pedro Mercado Lozano, Kyungjune Cho, Ankit Sharma, Souvik Das, Felix Kuster, Paolo Sessi, Manuel Brando, Robert Kuchler, Anastasios Markou, Markus Konig, Claudia Felser, Yasmine Sassa, Qiang Li, Genda Gu, Peter Swekis, Martin Zimmermann, Oleh Ivashko, Dennis I. Gorbunov, Sergei Zherlitsyn, Tobias Forster, Stuart Parkin, Joachim Wosnitza, Tobias Meng, Johannes Gooth

AI总结:

本文通过热力学、热电和输运测量结合三维狄拉克哈密顿量计算,证明ZrTe5中的准量子化霍尔效应源于其三维电子结构的内禀性质,而非磁场驱动的费米面不稳定性,确立了QHE的真正三维对应物。

摘要:

量子霍尔效应(QHE)传统上被视为纯粹的二维(2D)现象。最近,在狄拉克半金属ZrTe5中报道了三维(3D)版本的QHE。有人提出它源于磁场驱动的费米面不稳定性,将原始的三维电子系统转变为一叠二维薄片。在此,我们报告了ZrTe5在量子霍尔区间的热力学、热电和电荷输运测量结果。所测的热力学性质——磁化强度和超声传播——没有显示费米面不稳定性的任何特征,与磁场中的单晶X射线衍射结果一致。相反,将实验数据与基于有效三维狄拉克哈密顿量的线性响应计算直接比较表明,所观测到的霍尔响应的准量子化是三维电子结构的内禀性质。我们的发现使ZrTe5中的霍尔效应成为二维系统中QHE的真正三维对应物。

英文摘要:

The quantum Hall effect (QHE) is traditionally considered a purely two-dimensional (2D) phenomenon. Recently, a three-dimensional (3D) version of the QHE has been reported in the Dirac semimetal ZrTe5. It was proposed to arise from a magnetic-field-driven Fermi surface instability, transforming the original 3D electron system into a stack of 2D sheets. Here, we report thermodynamic, thermoelectric and charge transport measurements on ZrTe5 in the quantum Hall regime. The measured thermodynamic properties: magnetization and ultrasound propagation, show no signatures of a Fermi surface instability, consistent with in-field single crystal X-ray diffraction. Instead, a direct comparison of the experimental data with linear response calculations based on an effective 3D Dirac Hamiltonian suggests that the quasi-quantization of the observed Hall response is an intrinsic property of the 3D electronic structure. Our findings render the Hall effect in ZrTe5 a truly 3D counterpart of the QHE in 2D systems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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