Electronic structure and localized lanthanide character of Ln<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>T</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>Al<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>10</mml:mn></mml:msub></mml:math>(<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>T</mml:mi></mml:math> = Ru, Os)

Tanida, Hiroshi; Tanaka, Daiki; Sera, Masafumi; Tanimoto, Sakiyo; Nishioka, Takashi; Matsumura, Masatoshi; Ogawa, Mayuko; Moriyoshi, Chikako; Kuroiwa, Yoshihiro; Kim, J. E.; Tsuji, Naruki; Takata, Masaki

doi:10.1103/physrevb.84.115128

Cited by 41 publications

(44 citation statements)

References 32 publications

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“…12,26 This is probably due to the difference in the sign of the second order Stevens factor. It is positive for Sm 3+ , whereas it is negative for Ce 3+ and Nd 3+ .…”

Section: Resultsmentioning

confidence: 97%

Incommensurate-commensurate magnetic phase transition inSmRu2Al10

et al. 2015

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Magnetic properties of single crystalline SmRu2Al10 have been investigated by electrical resistivity, magnetic susceptibility, and specific heat. We have confirmed the successive magnetic phase transitions at TN = 12.3 K and TM = 5.6 K. Resonant x-ray diffraction has also been performed to study the magnetic structures. Below TN, the Sm 3+ moments order in an incommensurate structure with q1 = (0, 0.759, 0). The magnetic moments are oriented along the orthorhombic b axis, which coincides with the magnetization easy axis in the paramagnetic phase. A very weak third harmonic peak is also observed at q3 = (0, 0.278, 0). The transition at TM is a lock-in transition to the commensurate structure described by q1 = (0, 0.75, 0). A well developed third harmonic peak is observed at q3 = (0, 0.25, 0). From the discussion of the magnetic structure, we propose that the long-range RKKY interaction plays an important role, in addition to the strong nearest neighbor antiferromagnetic interaction.

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“…12,26 This is probably due to the difference in the sign of the second order Stevens factor. It is positive for Sm 3+ , whereas it is negative for Ce 3+ and Nd 3+ .…”

Section: Resultsmentioning

confidence: 97%

Incommensurate-commensurate magnetic phase transition inSmRu2Al10

et al. 2015

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“…Although our model is a skeleton model and further sophistication is necessary to compare with the experiments, we believe that our analyses dig out the new essential features of the spin-charge-orbital coupled systems, which are possibly explored in monolayer M XX 3 . Moreover, similar interesting physics is expected also in other centrosymmetric lattices with local asymmetry like the zig-zag chain and diamond lattice, which are found in several f -electron compounds, such as UGe 2 [46,47,48], URhGe [49,50,51], UCoGe [52,53,54], LnM 2 Al 10 (Ln = Ce, Nd, Gd, Dy, Ho, Er, M = Fe, Ru, Os) [55,56,57,58,59,60,61,62], RT 2 X 20 (R = Pr, La, Yb, U, T = Fe, Co, Ti, V, Nb, Ru, Rh, Ir, X = Al, Zn) [63,64,65,66,67,68,69,70,71,72,73,74], and β-YbAlB 4 [75,76,77,78]. Further efforts from both theoretical and experimental sides are highly desired for such exploration.…”

Section: Summary and Concluding Remarksmentioning

confidence: 94%

Emergent spin-valley-orbital physics by spontaneous parity breaking

Hayami

Kusunose

Motome

2016

J. Phys.: Condens. Matter

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Abstract. The spin-orbit coupling in the absence of spatial inversion symmetry plays an important role in realizing intriguing electronic states in solids, such as topological insulators and unconventional superconductivity. Usually, the inversion symmetry breaking is inherent in the lattice structures, and hence, it is not easy to control these interesting properties by external parameters. We here theoretically investigate the possibility of generating the spin-orbital entanglement by spontaneous electronic ordering caused by electron correlations. In particular, we focus on the centrosymmetric lattices with local asymmetry at the lattice sites, e.g., zig-zag, honeycomb, and diamond structures. In such systems, conventional staggered orders, such as charge order and antiferromagnetic order, break the inversion symmetry and activate the antisymmetric spin-orbit coupling, which is hidden in a sublatticedependent form in the paramagnetic state. Considering a minimal two-orbital model on a honeycomb lattice, we scrutinize the explicit form of the antisymmetric spinorbit coupling for all the possible staggered charge, spin, orbital, and spin-orbital orders. We show that the complete table is useful for understanding of spin-valleyorbital physics, such as spin and valley splitting in the electronic band structure and generalized magnetoelectric responses in not only spin but also orbital and spin-orbital channels, reflecting in peculiar magnetic, elastic, and optical properties in solids.

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“…35) Recent experimental studies of a series of LnM 2 Al 10 compounds have shown that the antiferromagnetic order occurs in most of these compounds. [35][36][37][38][39][40] A variety of inter-zigzag-chain magnetic structures appear depending on the Ln and M ions. However, the intra-zigzag-chain magnetic structure is universal; the magnetic moment is staggered in the zigzag chains, as shown in Fig.…”

Section: Kondo Systemsmentioning

confidence: 99%

Magneto-Electric Effect in Three-Dimensional Coupled Zigzag Chains

2014

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Stimulated by recent studies of quantum phases with broken local inversion symmetry, we study the magnetoelectric effect in locally noncentrosymmetric metals. We consider threedimensional (3D) coupled zigzag chains and demonstrate that the antiferromagnetic moment is induced by the electric current through a staggered antisymmetric spin-orbit coupling. This current-induced magnetism is much larger than that in globally noncentrosymmetric metals. We provide an intuitive understanding of the current-induced antiferromagnetic moment by showing the inverse magnetoelectric effect, that is, the ferroic p-wave charge nematic order accompanied by the asymmetric band structure in the antiferromagnetic state. We also examine conduction electrons coupled to localized spins via Kondo exchange coupling and demonstrate a significant enhancement of the magnetoelectric effect. A possible experimental observation of the magnetoelectric effect in metals is discussed, with focus on LnM2Al10 compounds, such as NdRu2Al10 and TbRu2Al10.

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Electronic structure and localized lanthanide character of LnT2Al10(T = Ru, Os)

Cited by 41 publications

References 32 publications

Incommensurate-commensurate magnetic phase transition inSmRu2Al10

Incommensurate-commensurate magnetic phase transition inSmRu2Al10

Emergent spin-valley-orbital physics by spontaneous parity breaking

Magneto-Electric Effect in Three-Dimensional Coupled Zigzag Chains

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