ã€Chinese instrument network instrument research and development】 The strong magnetic field science center of Hefei Institute of Materials Science, Chinese Academy of Sciences Zhang Changjin Group's No.5 water-cooled magnet using a steady-state strong magnetic field experimental apparatus was conducted under a magnetic field strength of 30 Tesla and a low temperature of 0.36K. With precise data measurements, the electronic structure of a potential topological superconducting material, PdTe2, has been studied and a perfectly strong magnetic field oscillation signal has been obtained. This work gives the dominant single-band electronic structure in this system from both magnetic and electrical properties. This result is of great significance for the later research on the electronic state structure of topological superconducting materials.
The research result is De Hassvan Alphen and magnetoresistance reveal predominantly single-band transport behavior in PdTe2, published in the "Scientific Report" (Scientific Reports, 6,31554 (2016)) published on August 12.
Topological superconducting materials have become a hot topic in the field of condensed matter physics and material physics because of their great prospects in basic physical research and industrial applications. In the past few years, potential topological superconducting materials such as CuxBi2Se3 and SrxBi2Se3 have been found in doped topological insulators, which has caused widespread concern. However, there is no complete understanding of the electronic state of topological superconducting materials.
Previous theoretical calculations and experimental results of angle-resolved photoelectron spectroscopy have shown that PdTe2 material has a complex multi-band electronic structure, which greatly limits the further study of this system. Zhang Changjin's group observed a very clear and periodic deHass-van Alphen oscillation signal through magnetic measurements in a strong magnetic field. Fourier analysis of the oscillation signal revealed a dominant oscillation peak in the system. Compared with this oscillation peak, the amplitudes of other oscillation peaks (representing different energy bands) are at least one order of magnitude or more lower. This shows that the electronic structure of the system can be completely reduced to a single-band structure. The research group also used a resistivity test under a strong magnetic field to obtain evidence of single-band behavior from the magnetoresistance behavior.
The work was funded by the Ministry of Science and Technology, the National Natural Science Foundation of China and the Hefei University Science Center.
(Original title: Hefei Research Institute made progress in the study of electronic states of topological superconducting materials in a strong magnetic field)
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The research result is De Hassvan Alphen and magnetoresistance reveal predominantly single-band transport behavior in PdTe2, published in the "Scientific Report" (Scientific Reports, 6,31554 (2016)) published on August 12.
Topological superconducting materials have become a hot topic in the field of condensed matter physics and material physics because of their great prospects in basic physical research and industrial applications. In the past few years, potential topological superconducting materials such as CuxBi2Se3 and SrxBi2Se3 have been found in doped topological insulators, which has caused widespread concern. However, there is no complete understanding of the electronic state of topological superconducting materials.
Previous theoretical calculations and experimental results of angle-resolved photoelectron spectroscopy have shown that PdTe2 material has a complex multi-band electronic structure, which greatly limits the further study of this system. Zhang Changjin's group observed a very clear and periodic deHass-van Alphen oscillation signal through magnetic measurements in a strong magnetic field. Fourier analysis of the oscillation signal revealed a dominant oscillation peak in the system. Compared with this oscillation peak, the amplitudes of other oscillation peaks (representing different energy bands) are at least one order of magnitude or more lower. This shows that the electronic structure of the system can be completely reduced to a single-band structure. The research group also used a resistivity test under a strong magnetic field to obtain evidence of single-band behavior from the magnetoresistance behavior.
The work was funded by the Ministry of Science and Technology, the National Natural Science Foundation of China and the Hefei University Science Center.
(Original title: Hefei Research Institute made progress in the study of electronic states of topological superconducting materials in a strong magnetic field)
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