Orbital order and fluctuations in the two-leg ladder materials BaFe2X3 (X = S and Se) and CsFe2Se3

Kou Takubo; Yuichi Yokoyama; Hiroki Wadati; Shun Iwasaki; Takashi Mizokawa; Teak Boyko; Ronny Sutarto; Feizhou He; Kazuki Hashizume; Satoshi Imaizumi; Takuya Aoyama; Yoshinori Imai; Kenya Ohgushi

Orbital order and fluctuations in the two-leg ladder materials BaFe₂X₃ (X = S and Se) and CsFe₂Se₃

Kou Takubo, Yuichi Yokoyama, Hiroki Wadati, Shun Iwasaki, Takashi Mizokawa, Teak Boyko, Ronny Sutarto, Feizhou He, Kazuki Hashizume, Satoshi Imaizumi, Takuya Aoyama, Yoshinori Imai, Kenya Ohgushi

School of Advanced Science and Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

The electronic structure of BaFe₂X₃(X = S and Se) and CsFe₂Se₃ in which two-leg ladders are formed by the Fe sites are studied by means of x-ray absorption and resonant inelastic x-ray scattering spectroscopy. The x-ray absorption spectra at the Fe L edges for BaFe₂X₃ exhibit two components, indicating that itinerant and localized Fe 3d sites coexist. Substantial x-ray linear dichroism is observed in polarization dependent spectra, indicating the existence of orbital order or fluctuation in the Fe-ladder even above the Néel temperature TN. Direct exchange interaction along the legs of the Fe-ladder stabilizes the orbital and antiferromagnetic orders in BaFe₂S₃, while the ferromagnetic molecular orbitals are realized between the rungs in CsFe₂Se₃.

Original language	English
Journal	Unknown Journal
Publication status	Published - 2017 Apr 17

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Orbital order and fluctuations in the two-leg ladder materials BaFe₂X₃ (X = S and Se) and CsFe₂Se₃. / Takubo, Kou; Yokoyama, Yuichi; Wadati, Hiroki; Iwasaki, Shun; Mizokawa, Takashi; Boyko, Teak; Sutarto, Ronny; He, Feizhou; Hashizume, Kazuki; Imaizumi, Satoshi; Aoyama, Takuya; Imai, Yoshinori; Ohgushi, Kenya.

In: Unknown Journal, 17.04.2017.

Research output: Contribution to journal › Article › peer-review

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title = "Orbital order and fluctuations in the two-leg ladder materials BaFe2X3 (X = S and Se) and CsFe2Se3",

abstract = "The electronic structure of BaFe2X3 (X = S and Se) and CsFe2Se3 in which two-leg ladders are formed by the Fe sites are studied by means of x-ray absorption and resonant inelastic x-ray scattering spectroscopy. The x-ray absorption spectra at the Fe L edges for BaFe2X3 exhibit two components, indicating that itinerant and localized Fe 3d sites coexist. Substantial x-ray linear dichroism is observed in polarization dependent spectra, indicating the existence of orbital order or fluctuation in the Fe-ladder even above the N{\'e}el temperature TN. Direct exchange interaction along the legs of the Fe-ladder stabilizes the orbital and antiferromagnetic orders in BaFe2S3, while the ferromagnetic molecular orbitals are realized between the rungs in CsFe2Se3.",

author = "Kou Takubo and Yuichi Yokoyama and Hiroki Wadati and Shun Iwasaki and Takashi Mizokawa and Teak Boyko and Ronny Sutarto and Feizhou He and Kazuki Hashizume and Satoshi Imaizumi and Takuya Aoyama and Yoshinori Imai and Kenya Ohgushi",

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T1 - Orbital order and fluctuations in the two-leg ladder materials BaFe2X3 (X = S and Se) and CsFe2Se3

AU - Takubo, Kou

AU - Yokoyama, Yuichi

AU - Wadati, Hiroki

AU - Iwasaki, Shun

AU - Mizokawa, Takashi

AU - Boyko, Teak

AU - Sutarto, Ronny

AU - He, Feizhou

AU - Hashizume, Kazuki

AU - Imaizumi, Satoshi

AU - Aoyama, Takuya

AU - Imai, Yoshinori

AU - Ohgushi, Kenya

PY - 2017/4/17

Y1 - 2017/4/17

N2 - The electronic structure of BaFe2X3 (X = S and Se) and CsFe2Se3 in which two-leg ladders are formed by the Fe sites are studied by means of x-ray absorption and resonant inelastic x-ray scattering spectroscopy. The x-ray absorption spectra at the Fe L edges for BaFe2X3 exhibit two components, indicating that itinerant and localized Fe 3d sites coexist. Substantial x-ray linear dichroism is observed in polarization dependent spectra, indicating the existence of orbital order or fluctuation in the Fe-ladder even above the Néel temperature TN. Direct exchange interaction along the legs of the Fe-ladder stabilizes the orbital and antiferromagnetic orders in BaFe2S3, while the ferromagnetic molecular orbitals are realized between the rungs in CsFe2Se3.

AB - The electronic structure of BaFe2X3 (X = S and Se) and CsFe2Se3 in which two-leg ladders are formed by the Fe sites are studied by means of x-ray absorption and resonant inelastic x-ray scattering spectroscopy. The x-ray absorption spectra at the Fe L edges for BaFe2X3 exhibit two components, indicating that itinerant and localized Fe 3d sites coexist. Substantial x-ray linear dichroism is observed in polarization dependent spectra, indicating the existence of orbital order or fluctuation in the Fe-ladder even above the Néel temperature TN. Direct exchange interaction along the legs of the Fe-ladder stabilizes the orbital and antiferromagnetic orders in BaFe2S3, while the ferromagnetic molecular orbitals are realized between the rungs in CsFe2Se3.

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