TY - JOUR
T1 - Split Fermi Surface Properties of Noncentrosymmetric Compounds Fe2P, Ni2P, and Pd2Si
AU - Onuki, Yoshichika
AU - Nakamura, Ai
AU - Aoki, Dai
AU - Matsuda, Tatsuma D.
AU - Haga, Yoshinori
AU - Harima, Hisatomo
AU - Takeuchi, Tetsuya
AU - Kaneko, Yoshio
N1 - Funding Information:
Acknowledgments One of the authors (Y.O.) thanks Akiko Kikkawa, Yasujiro Taguchi, and Yoshinori Tokura for helpful support. This work was financially supported by KAKENHI (JP19H00646).
Publisher Copyright:
© 2022 The Physical Society of Japan.
PY - 2022/6/15
Y1 - 2022/6/15
N2 - We grew single crystals of Fe2P, Ni2P, and Pd2Si with a noncentrosymmetric Fe2P-type hexagonal structure, studied their Fermi surface properties by de Haas-van Alphen (dHvA) experiments, and compared results with energy band calculations. In paramagnets Ni2P and Pd2Si, the detected dHvA branches are well explained by the results of full potential linear augmented plane wave (FLAPW) band calculations. Because of the noncentrosymmetric crystal structure, the energy band splits, leading to two split Fermi surfaces. The angular dependences of dHvA frequencies for the main split Fermi surfaces are highly anisotropic, which is not observed for H ∥ [0001] but observed for H ⊥ [0001]. The splitting energy due to the antisymmetric spin-orbit coupling is approximately estimated to be Δϵ ≃ 300K in Ni2P and 500K in Pd2Si for H ∥ [1010]. This is a characteristic feature of the split Fermi surfaces in these compounds. In the case of a ferromagnet Fe2P, only one kind of spin-split dHvA branch was observed.
AB - We grew single crystals of Fe2P, Ni2P, and Pd2Si with a noncentrosymmetric Fe2P-type hexagonal structure, studied their Fermi surface properties by de Haas-van Alphen (dHvA) experiments, and compared results with energy band calculations. In paramagnets Ni2P and Pd2Si, the detected dHvA branches are well explained by the results of full potential linear augmented plane wave (FLAPW) band calculations. Because of the noncentrosymmetric crystal structure, the energy band splits, leading to two split Fermi surfaces. The angular dependences of dHvA frequencies for the main split Fermi surfaces are highly anisotropic, which is not observed for H ∥ [0001] but observed for H ⊥ [0001]. The splitting energy due to the antisymmetric spin-orbit coupling is approximately estimated to be Δϵ ≃ 300K in Ni2P and 500K in Pd2Si for H ∥ [1010]. This is a characteristic feature of the split Fermi surfaces in these compounds. In the case of a ferromagnet Fe2P, only one kind of spin-split dHvA branch was observed.
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U2 - 10.7566/JPSJ.91.064712
DO - 10.7566/JPSJ.91.064712
M3 - Article
AN - SCOPUS:85130729539
SN - 0031-9015
VL - 91
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
IS - 6
M1 - 064712
ER -