L-point quadrupole order under magnetic field in cubic PrIr$_2$Zn$_{20}$
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| Format: | Preprint |
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2025
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| _version_ | 1866914528302727168 |
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| author | Okanoya, Hitoko Hattori, Kazumasa |
| author_facet | Okanoya, Hitoko Hattori, Kazumasa |
| contents | We study quadrupole orders in heavy-fermion compound PrIr$_2$Zn$_{20}$ under magnetic fields on the basis of the Landau theory. Assuming $E_g$ electric quadrupolar orders in the cubic symmetry with the ordering wavenumber at the L points in the face-centered cubic lattice Brillouin zone as observed experimentally, we construct a Landau free energy and analyze the resulting free energy. We find that the unidentified high-temperature ordered phase under the magnetic field ${\bf H} \parallel [001]$ reported earlier arises from the rotation of the quadrupole moments of f electrons on the Pr site. We also discuss the phase diagram for other magnetic-field directions and possible double-${\bf q}$ quadrupolar orders in this system. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2504_10216 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | L-point quadrupole order under magnetic field in cubic PrIr$_2$Zn$_{20}$ Okanoya, Hitoko Hattori, Kazumasa Strongly Correlated Electrons We study quadrupole orders in heavy-fermion compound PrIr$_2$Zn$_{20}$ under magnetic fields on the basis of the Landau theory. Assuming $E_g$ electric quadrupolar orders in the cubic symmetry with the ordering wavenumber at the L points in the face-centered cubic lattice Brillouin zone as observed experimentally, we construct a Landau free energy and analyze the resulting free energy. We find that the unidentified high-temperature ordered phase under the magnetic field ${\bf H} \parallel [001]$ reported earlier arises from the rotation of the quadrupole moments of f electrons on the Pr site. We also discuss the phase diagram for other magnetic-field directions and possible double-${\bf q}$ quadrupolar orders in this system. |
| title | L-point quadrupole order under magnetic field in cubic PrIr$_2$Zn$_{20}$ |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2504.10216 |