| Autor: |
Aratani, Hidekazu, Nakatani, Yasuhiro, Fujiwara, Hidenori, Kawada, Moeki, Kanai, Yuina, Yamagami, Kohei, Fujioka, Shuhei, Hamamoto, Satoru, Kuga, Kentaro, Kiss, Takayuki, Yamasaki, Atsushi, Higashiya, Atsushi, Kadono, Toshiharu, Imada, Shin, Tanaka, Arata, Tamasaku, Kenji, Yabashi, Makina, Ishikawa, Tetsuya, Yasui, Akira, Saito, Yuji, Narumi, Yasuo, Kindo, Koichi, Ebihara, Takao, Sekiyama, Akira |
| Jazyk: |
angličtina |
| Rok vydání: |
2018 |
| Předmět: |
|
| Zdroj: |
Physical Review B. 98(12):121113_1-121113_6 |
| ISSN: |
2469-9950 |
| Popis: |
We present a detailed study on the $4f$ ground state symmetry of the pressure-induced superconductor CeCu$_2$Ge$_2$ probed by soft X-ray absorption and hard X-ray photoemission spectroscopy. The revised Ce $4f$ ground states are determined as $|{\Gamma_7}\rangle=\sqrt{0.45}|{J_{z}=\pm \frac{5}{2}}\rangle - \sqrt{0.55}|{\mp \frac{3}{2}}\rangle$ with $\Sigma\mathchar`-{\rm type}$ in-plane rotational symmetry. This gives an in-plane magnetic moment consistent with the antiferromagnetic moment as reported in neutron measurements. Since the in-plane symmetry is the same as that for the superconductor CeCu$_2$Si$_2$, we propose that the charge distribution along the $c$-axis plays an essential role in driving the system into a superconducting phase. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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