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Condensed Matter > Strongly Correlated Electrons
Title: RKKY Interactions and Multipole Order in Ab initio Wannier Model of CeCoSi
(Submitted on 13 Mar 2024 (v1), last revised 23 Apr 2024 (this version, v3))
Abstract: We calculate the RKKY interactions derived from ab initio calculations for the intermetallic compound CeCoSi exhibiting the hidden nonmagnetic order at $T_0$ and examine the instability towards possible multipole orders within the random phase approximation. All 36 multipole interactions up to rank 5 are investigated, and the maximum susceptibility exhibits an antiferro order with $\boldsymbol{q}=\boldsymbol{0}$ for nonmagnetic multipoles of monopole $I$ and hexadecapole $H_{0}$, yielding a charge imbalance of $f$ electrons at two Ce atoms in the unit cell. The obtained order can explain some experiments.
Submission history
From: Takemi Yamada [view email][v1] Wed, 13 Mar 2024 01:52:59 GMT (3392kb,D)
[v2] Thu, 4 Apr 2024 02:00:23 GMT (3391kb,D)
[v3] Tue, 23 Apr 2024 07:15:46 GMT (3391kb,D)
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