Impact of Pressure on Structural, Vibrational, and Electrical Properties of Nodal-Line Semimetal HfGe0.92Te
Source abstract
Abstract
The layered nodal-line semimetals hold a fascinating prospect of realizing two-dimensional spin–orbit Dirac points with their diverse ranges of Dirac points near the Fermi level, offering exciting avenues for investigating topological properties. We have explored high-pressure resistivity measurements, in situ Raman spectra, synchrotron X-ray diffraction experiments, and density functional theory calculations on HfGe 0.92 Te single crystals. The Lifshitz transition is observed at 5 GPa, while the structure evolution reveals that the pristine tetragonal structure remains robust within this pressure range. We explore these indirect experimental indications of the transition occurring at 5 GPa, considering the potential Lifshitz transition for HfGe 0.92 Te as inferred from our electronic band structure calculations. This work highlights the significant role of pressure in molding the electronic characteristics of HfGe 0.92 Te and stimulates further exploration of unique electronic behaviors within the broader family of WHM materials, which can be harnessed in the development of electronic devices under extreme conditions.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Topological Materials and Phenomena · 2D Materials and Applications · Graphene research and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China
Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
Funding
Shenzhen Peacock Plan · Guangdong Provincial Introduction of Innovative Research and Development Team · National Key Research and Development Program of China · Youth Innovation Promotion Association of the Chinese Academy of Sciences · Bureau of Frontier Sciences and Education, Chinese Academy of Sciences · Beijing Municipal Natural Science Foundation · National Natural Science Foundation of China · Chinese Academy of Sciences
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