Unique Electronic States in Non-centrosymmetric Cubic Compounds

Kakihana, Masashi; Nishimura, Kaneyasu; Ashitomi, Yousuke; Yara, Tomoyuki; Aoki, Dai; Nakamura, Ai; Honda, Fuminori; Nakashima, Miho; Amako, Yasushi; Uwatoko, Yoshiya; Sakakibara, Toshiro; Nakamura, Shota; Takeuchi, Tetsuya; Haga, Yoshinori; Yamamoto, Etsuji; Harima, Hisatomo; Hedo, Masato; Nakama, Takao; Ōnuki, Yoshichika

doi:10.1007/s11664-016-5265-z

Cited by 30 publications

(23 citation statements)

References 18 publications

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“…Furthermore, we measured the ac-susceptibility χ ac , as shown in Fig. 5 The present observations in the Hall resistivities and magnetoresistances in the AF2 phase are somewhat similar to the skyrmion phase in EuPtSi [6][7][8]. It is uncertain at present whether the AF2 phase is related to the topological phases such as the skyrmion phase.…”

Section: Experimental Results and Analysessupporting

confidence: 51%

“…Here, the skyrmion structure, which is a regular arrangement of spin whirls like a vortex lattice in type II-superconductors, produces an emergent magnetic field for conduction electrons, resulting in the additional (topological) Hall resistivity ∆ρ H . Very recently, we found the topological Hall resistivity in EuPtSi with a cubic chiral antiferromagnet [6][7][8]. The Hall resistivity in these compounds is expressed as ρ H = R 0 H + 4πR s M + ∆ρ H .…”

Section: Introductionmentioning

confidence: 99%

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Anomalous Hall Effect in Antiferromagnet EuNiGe₃ with the Rashba-type Tetragonal Structure

Iha

Matsuda

Kakihana

et al. 2020

Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2019)

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EuTGe 3 (T: transition metal) crystallizes in the so-called Rashba-type noncentrosymmetric tetragonal structure. Eu ions are divalent and order antiferromagnetically, with the helical magnetic structure. EuNiGe 3 is such a compound with a Néel temperature T N = 13 K, exhibiting two metamagnetic transitions at H m1 = 20 kOe and H m2 = 29 kOe at 2 K for H ∥ [001] and saturates above H c = 38 kOe with an ordered moment 7 µ B /Eu. The corresponding Hall resistivity ρ H indicates two dip structures between H m1 and H m2 , together with between H m2 and H c. The magnetoresistance also indicates a large peak structure between H m1 and H m2 , together with a rather small peak structure between H m2 and H c .

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Section: Experimental Results and Analysessupporting

confidence: 51%

Section: Introductionmentioning

confidence: 99%

Anomalous Hall Effect in Antiferromagnet EuNiGe₃ with the Rashba-type Tetragonal Structure

Iha

Matsuda

Kakihana

et al. 2020

Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2019)

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“…Here, S , L, and J are spin, orbital, and total angular momenta, respectively. EuPtSi belongs to these Eu compounds with a small Néel temperature T N = 4.0 K [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, the Heisenberg model of the trillium lattice exhibits a first-order transition to the magnetically ordered state [3,4]. The recent low-temperature measurements of the electrical resistivity, specific heat, thermal expansion, magnetostriction, magnetic susceptibility, and magnetization clarified the first-order antiferromagnetic ordering at T N = 4.0 K [1,2,6]. The magnetization at 2 K for H ∥ [111] indicates two metamagnetic transitions at H A1 = 9.2 kOe and H A2 = 13.8 kOe and saturates above H c = 26.6 kOe [7].…”

Section: Introductionmentioning

confidence: 99%

Unique Skyrmion Phases and Conduction Electrons in Cubic Chiral Antiferromagnet EuPtSi and Related Compounds

Ōnuki

Kakihana

Iha

et al. 2020

Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2019)

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EuPtSi crystallizes in the cubic chiral structure (P2 1 3, No.198), which is the same as the noncentrosymmetric space group of MnSi with the skyrmion structure. The first-order antiferromagnetic transition occurs at T N = 4.0 K, and EuPtSi is in the helical magnetic state with the propagation vector q = (0.2, 0.3, 0) at low temperatures. We found the skyrmion structure in a closed H-T phase or the so-called "A-phase" for H ∥ [111], together with a new skyrmion-related phase named the "Bphase" for H ∥ [001]. It is characteristic that the A-phase is clearly observed in the magnetization, Hall resistivity, as-susceptibility, magnetostriction, and magnetoresistance. This is due to a small size of the skyrmion, 18 Å, in other words, a large number of the skyrmion density. The A-phase is thus anisotropic, not observed for H ∥ [110]. We also clarified the split Fermi surface properties based on the chiral nature of the crystal structure from the de Haas-van Alphen experiment and energy band calculation. Furthermore, we present the magnetic properties of EuPtGe with T N ≃ 3 K.

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“…In the LaIrSi-type compounds, EuPtSi was intensively studied in terms of its magnetic properties. This compound is an antiferromagnet with a Néel temperature of 4 K [17,18], and was found to show various magnetic phases in magnetic fields [19,20].…”

Section: Introductionmentioning

confidence: 99%

Proceedings of J-Physics 2019: International Conference on Multipole Physics and Related Phenomena

2020

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We report the synthesis, electronic properties, and electronic structure of LaIrSi-type BaPtP with a noncentrosymmetric cubic crystal structure. Electrical resistivity and heat capacity data taken by using polycrystalline samples indicated that BaPtP is a metal, which was further supported by first principles calculations. A polycrystalline sample of BaPtP showed a zero resistivity below 0.2 K due to the superconducting transition. The first principles calculation results indicated that the spin splitting at around the Fermi energy is large in BaPtP. These results suggest that BaPtP is likely to exhibit interesting physical properties caused by a strong spin-orbit coupling of 5d electrons in the Pt atoms.

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Unique Electronic States in Non-centrosymmetric Cubic Compounds

Cited by 30 publications

References 18 publications

Anomalous Hall Effect in Antiferromagnet EuNiGe₃ with the Rashba-type Tetragonal Structure

Anomalous Hall Effect in Antiferromagnet EuNiGe₃ with the Rashba-type Tetragonal Structure

Unique Skyrmion Phases and Conduction Electrons in Cubic Chiral Antiferromagnet EuPtSi and Related Compounds

Proceedings of J-Physics 2019: International Conference on Multipole Physics and Related Phenomena

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Unique Electronic States in Non-centrosymmetric Cubic Compounds

Cited by 30 publications

References 18 publications

Anomalous Hall Effect in Antiferromagnet EuNiGe3 with the Rashba-type Tetragonal Structure

Anomalous Hall Effect in Antiferromagnet EuNiGe3 with the Rashba-type Tetragonal Structure

Unique Skyrmion Phases and Conduction Electrons in Cubic Chiral Antiferromagnet EuPtSi and Related Compounds

Proceedings of J-Physics 2019: International Conference on Multipole Physics and Related Phenomena

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Anomalous Hall Effect in Antiferromagnet EuNiGe₃ with the Rashba-type Tetragonal Structure

Anomalous Hall Effect in Antiferromagnet EuNiGe₃ with the Rashba-type Tetragonal Structure