Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 9, Issue 22, Pages -Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1tc01034d
Keywords
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Funding
- Key University Science Research Project of Jiangsu Province [19KJA530003]
- National Natural Science Foundation of China [11604027, 11874113, 11704047, U1832147, 12047512]
- Natural Science Foundation of Fujian Province of China [2020J02018]
- Natural Science Foundation of Guangdong Province [2017A030310578]
- Open Fund of Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials [QMNEM1903]
- China Postdoctoral Science Foundation [2020M680011]
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Magnetic topological semimetals are a novel state of quantum matter with nontrivial band topology. External stimuli can alter their spin states and Fermi surface characteristics. Through experiments and calculations on HoSb in different magnetic states, it was found that the topological features change with the magnetic transition.
Magnetic topological semimetals, a novel state of quantum matter with a nontrivial band topology, have emerged as a new frontier in physics and materials science. An external stimulus such as temperature or magnetic field could be expected to alter their spin states and thus Fermi surface anisotropies and topological features. Here, we perform angular magnetoresistance measurements and electronic band structure calculations to reveal the evolution of HoSb's Fermi surface anisotropies and topological nature in different magnetic states. The angular magnetoresistance results show that its Fermi surface anisotropy is robust in the paramagnetic state but is significantly modulated in the antiferromagnetic and ferromagnetic states. More interestingly, a transition from the trivial (nontrivial) to nontrivial (trivial) topological electronic phase is observed when HoSb undergoes a magnetic transition from the paramagnetic (antiferromagnetic) to antiferromagnetic (ferromagnetic) state induced by temperature (applied magnetic field). Our study suggests that HoSb provides an archetype platform to study the correlations between magnetism and topological states of matter.
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