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Origin of the quasi-quantized Hall effect in ZrTe5.
- Source :
- Nature Communications; 5/27/2021, Vol. 12 Issue 1, p1-8, 8p
- Publication Year :
- 2021
-
Abstract
- The quantum Hall effect (QHE) is traditionally considered to be a purely two-dimensional (2D) phenomenon. Recently, however, a three-dimensional (3D) version of the QHE was reported in the Dirac semimetal ZrTe<subscript>5</subscript>. 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, spectroscopic, thermoelectric and charge transport measurements on such ZrTe<subscript>5</subscript> samples. The measured properties: magnetization, ultrasound propagation, scanning tunneling spectroscopy, and Raman spectroscopy, 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 emerges from the interplay of the intrinsic properties of the ZrTe<subscript>5</subscript> electronic structure and its Dirac-type semi-metallic character. A 3D quantum Hall effect has been reported in Dirac semimetal ZrTe<subscript>5</subscript> due to a magnetic-field-driven Fermi surface instability. Here, the authors show evidence of quasi-quantized Hall response without Fermi surface instability, but they argue that it is due to the interplay of the intrinsic properties of ZrTe<subscript>5</subscript> electronic structure and Dirac semi-metallic character. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20411723
- Volume :
- 12
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Nature Communications
- Publication Type :
- Academic Journal
- Accession number :
- 150538511
- Full Text :
- https://doi.org/10.1038/s41467-021-23435-y