Pressure-dependent electronic structures and orbital hybridization of Mn<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>3</mml:mn><mml:mi>d</mml:mi></mml:mrow></mml:math>states in multiferroic BiMnO<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>3</mml:mn></mml:msub></mml:math>: A combined x-ray absorption, x-ray emission, and resonant x-ray emission study

Chen, J. M.; Lee, J. M.; Chen, S. A.; Lu, Kueih‐Tzu; Deng, Ming-Jay; Liao, Yen-Fa; Lin, Jiunn-Yuan; Chen, B. H.; Chou, F. C.; Hiraoka, Nozomu; Ishii, Hirofumi; Tsuei, Ku Ding; Huang, Eugene

doi:10.1103/physrevb.86.045103

Cited by 16 publications

(23 citation statements)

References 67 publications

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“…3. In this study, we only focused on the main absorption edge at ~ 6555 eV, which is due to the electronic excitation from the Mn core 1 s orbital to empty 4 p orbitals18. The absorption intensity revealed the unoccupied states of the Mn 4 p orbitals.…”

Section: Resultsmentioning

confidence: 99%

“…The TFY signal is bulk sensitive17 and is suitable for investigating the effects of strain relaxation in films of the various thicknesses (12 to 100-nm) as used in our current study. The main absorption structure in the Mn K edge XANES is due to the excitation of a Mn core 1 s electron to empty 4 p orbitals18, which is sensitive to the local environment around the absorbing atom. For example, due to hybridization between Mn 3 d orbitals and O 2 p orbitals, there exists a mixture of O 2 p orbitals with Mn 3 d orbitals.…”

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confidence: 99%

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Effects of strain relaxation in Pr0.67Sr0.33MnO3 films probed by polarization dependent X-ray absorption near edge structure

Zhang

Chen

Yang

et al. 2016

Sci Rep

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The Mn K edge X-ray absorption near edge structure (XANES) of Pr0.67Sr0.33MnO3 films with different thicknesses on (001) LaAlO3 substrate was measured, and the effects of strain relaxation on film properties were investigated. The films showed in-plane compressive and out-of-plane tensile strains. Strain relaxation occurred with increasing film thickness, affecting both lattice constant and MnO6 octahedral rotation. In polarization dependent XANES measurements using in-plane (parallel) and out-of-plane (perpendicular) geometries, the different values of absorption resonance energy Er confirmed the film anisotropy. The values of Er along these two directions shifted towards each other with increasing film thickness. Correlating with X-ray diffraction (XRD) results it is suggested that the strain relaxation decreased the local anisotropy and corresponding probability of electronic charge transfer between Mn 3d and O 2p orbitals along the in-plane and out-of-plane directions. The XANES results were used to explain the film-thickness dependent magnetic and transport properties.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Effects of strain relaxation in Pr0.67Sr0.33MnO3 films probed by polarization dependent X-ray absorption near edge structure

Zhang

Chen

Yang

et al. 2016

Sci Rep

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“…This is the labeling scheme used in Ref. 49. It was found that the U (1) vertex operator labeled by (l, m) carry the Z 2 -charge l + m mod 2.…”

Section: A Non-invertible Bosonic Global Gravitational Anomaly Frmentioning

confidence: 99%

Noninvertible anomalies and mapping-class-group transformation of anomalous partition functions

Wen

2019

Phys. Rev. Research

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Recently, it was realized that anomalies can be completely classified by topological orders, symmetry protected topological orders, and symmetry enriched topological orders in one higher dimension. The anomalies that people used to study are invertible anomalies that correspond to invertible topological orders and/or symmetry protected topological orders in one higher dimension. In this paper, we introduce a notion of non-invertible anomaly, which describes the boundary of generic topological order. A key feature of non-invertible anomaly is that it has several partition functions. Under the mapping class group transformation of space-time, those partition functions transform in a certain way characterized by the data of the corresponding topological order in one higher dimension. In fact, the anomalous partition functions transform in the same way as the degenerate ground states of the corresponding topological order in one higher dimension. This general theory of non-invertible anomaly may have wide applications. As an example, we show that the irreducible gapless boundary of 2+1D double-semion topological order must have central charge c = c ≥ 25 28 . CONTENTS

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“…The orbital structure of oxygen octahedra is complicated due to Jahn-Teller distortion. Within each pseudoperovskite direction, the e g orbital se- [8][9][10][11][12]15 The orbital structure changes with the crystal structure, which undergoes some phase transition with temperature and external pressure, [6][7][8][9][10][11][12][13][14]17 thus, the Jahn-Teller distortions of oxygen octahedra are suppressed by growing temperature and pressure. The theoretical calculation of the orbital structure was carried out in Ref.…”

Section: Introductionmentioning

confidence: 99%

Crucial role of orbital structure in formation of frustrated magnetic structure in BiMnO3

Gonchar

Никифоров

2013

Phys. Rev. B

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The paper presents an investigation in the field of orbital physics of strongly correlated oxides. The theoretical study of vibronic mechanism of orbital and magnetic structures forming in BiMnO 3 crystal is carried out. An effect of orbital structure upon superexchange interaction is described. Nonlinear and second-neighbor terms in vibronic interaction on manganese ions play an important role in magnetic ordering of frustrated BiMnO 3 . It is shown that the linear vibronic interaction is insufficient to describe the experimentally detected ferromagnetic structure of bismuth manganite. The new approach to orbital structure formation, presented in the paper, could be used not only in manganite physics but also in other Jahn-Teller compounds.

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Pressure-dependent electronic structures and orbital hybridization of Mn3dstates in multiferroic BiMnO3: A combined x-ray absorption, x-ray emission, and resonant x-ray emission study

Cited by 16 publications

References 67 publications

Effects of strain relaxation in Pr0.67Sr0.33MnO3 films probed by polarization dependent X-ray absorption near edge structure

Effects of strain relaxation in Pr0.67Sr0.33MnO3 films probed by polarization dependent X-ray absorption near edge structure

Noninvertible anomalies and mapping-class-group transformation of anomalous partition functions

Crucial role of orbital structure in formation of frustrated magnetic structure in BiMnO3

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