Temperature-dependent and anisotropic optical response of layered Pr<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mrow><mml:mn>0.5</mml:mn></mml:mrow></mml:msub></mml:math>Ca<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mrow><mml:mn>1.5</mml:mn></mml:mrow></mml:msub></mml:math>MnO<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>4</mml:mn></mml:

Majidi, Muhammad Aziz; Thoeng, Edward; Gogoi, Pranjal Kumar; Wendt, F.; Wang, S. H.; Santoso, Iman; Asmara, Teguh Citra; Handayani, Indri; Loosdrecht, P.H.M. van; Nugroho, A. A.; Ruebhausen, M.; Rusydi, Andrivo; Rübhausen, Michael

doi:10.1103/physrevb.87.235135

Cited by 13 publications

(18 citation statements)

References 18 publications

(33 reference statements)

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“…This finding is in agreement with a previous study of Mn-O bonds in La 1−x Sr 1+x MnO 4 , which suggested that the structure is very sensitive to the occupation of e g orbitals [32,33]. We also note that a recent optical conductivity study of Pr 0.5 Ca 1.5 MnO 4 suggests that the oxygen p-orbital orientation changes in each temperature regime [29]. A change in oxygen p-orbital orientation will influence the manganese e g -orbital orientation because the oxygen ions are displaced along the directions of the Mn-O-Mn bonds.…”

Section: Discussionsupporting

confidence: 93%

“…Our analysis of the rotation mode intensity suggests that fluctuations of this mode accompanying the CO-OO transition are small enough to justify a mean field model. This finding is in agreement with previous studies on PCMO, where the CO below the transition could be approximately described by a mean field model [29]. Based on this observation, we propose that one of the physical phenomena behind the charge and orbital order in Pr 0.5 Ca 1.5 MnO 4 is the change in Mn-O bond lengths.…”

Section: Discussionsupporting

confidence: 93%

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Correlation between lattice vibrations with charge, orbital, and spin ordering in the layered manganitePr0.5Ca1.5MnO4

Handayani

Nugroho²,

Riyadi³

et al. 2015

Phys. Rev. B

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A Raman spectroscopy study on the half-doped single-layer manganite Pr 0.5 Ca 1.5 MnO 4 has been performed in combination with x-ray diffraction, resistivity, magnetization, and specific heat measurements. The results provide insight into the underlying mechanisms of phenomena that arise from correlations between lattice, charge, orbital, and spin degrees of freedom. The appearance of a new Raman mode at 366 cm −1 , a visible jump in the resistivity, and a doubling of the unit cell signify the onset of charge/orbital ordering at 320 K. This transition is also marked by a sharp peak in the magnetic susceptibility and specific heat, suggesting strong spin-charge coupling. Our structural analysis suggests that the charge disproportionation below 320 K is small. Orbital fluctuations below 320 K are evidenced by the evolution with temperature of the Jahn-Teller Raman mode (situated at 533 cm −1 at 320 K). A coincidence between the onset of two-dimensional short-range antiferromagnetic order at 215 K and anomalies in both the temperature dependence of the Jahn-Teller mode and the Mn-O bonding pattern in the ab plane indicate that the short-range magnetic order plays a role in stabilizing the orbital fluctuations. Below the Néel temperature of 127 K, the softening of both the 366 cm −1 mode and an octahedral tilting mode at 214 cm −1 mark the onset of three-dimensional antiferromagnetic ordering. The estimated spin-phonon coupling constants for these two modes are 2.6 and 6.8 cm −1 , respectively. This study highlights the remarkable coupling of charge, orbital, and spin degrees of freedom to the lattice in single-layer Pr 0.5 Ca 1.5 MnO 4 .

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Section: Discussionsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 93%

Correlation between lattice vibrations with charge, orbital, and spin ordering in the layered manganitePr0.5Ca1.5MnO4

Handayani

Nugroho²,

Riyadi³

et al. 2015

Phys. Rev. B

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“…The penetration depth of the pump and the probe was approximately matched by using a small 0.5°grazing incident angle of the x-ray beam. The estimated pump and probe depths are approximately 40 and 50 nm [32], respectively. The footprint of the x-ray probe beam on the sample surface was minimized by reducing the vertical beam size to 10 μm [33].…”

Section: Methodsmentioning

confidence: 93%

Correlations between electronic order and structural distortions and their ultrafast dynamics in the single-layer manganite Pr0.5Ca1.5Mn
Porer
¹
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Rettig
²
,
Bothschafter
³

et al. 2020
Phys. Rev. B
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“…The parameter I reflects the electrons excited by photons during the selected energy range. It can be defined as39:…”

Section: Resultsmentioning

confidence: 99%

Enhanced Crystallization Behaviors of Silicon-Doped Sb2Te Films: Optical Evidences

Guo

Zhang

et al. 2016

Sci Rep

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The optical properties and structural variations of silicon (Si) doped Sb2Te (SST) films as functions of temperature (210–620 K) and Si concentration (0–33%) have been investigated by the means of temperature dependent Raman scattering and spectroscopic ellipsometry experiments. Based upon the changes in Raman phonon modes and dielectric functions, it can be concluded that the temperature ranges for intermediates and transition states are estimated to 150, 120, 90, and 0 K, corresponding to ST, SST25%, SST28%, and SST33% films, respectively. The phenomenon also can be summarized by the thermal evolutions of interband electronic transition energies (En) and partial spectral weight integral (I). The disappearance of intermediate (INT) state for SST33% film between amorphous (AM) and hexagonal (HEX) phases can be attributed to the acceleratory crystallization of HEX phase by Si introduction. It illustrates that the risk of phase separation (Sb and Te) during the cyclic phase-change processes decreases with the increasing Si concentration. The enhanced crystallization behaviors can optimize the data retention ability and the long term stability of ST by Si doping, which are important indicators for phase change materials. The performance improvement has been analyzed qualitatively from the optical perspective.

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Temperature-dependent and anisotropic optical response of layered Pr0.5Ca1.5MnO4

Abstract: Temperature-dependent and anisotropic optical response of layered Pr0.5Ca1.5MnO4 probed by spectroscopic ellipsometry Majidi, M. A.; Thoeng, E.; Gogoi, P. K.; Wendt, F.; Wang, S. H.; Santoso, I.; Asmara, T. C.; Handayani, I. P.; van Loosdrecht, P. H. M.; Nugroho, A. A.

Cited by 13 publications

References 18 publications

Correlation between lattice vibrations with charge, orbital, and spin ordering in the layered manganitePr0.5Ca1.5MnO4

Correlation between lattice vibrations with charge, orbital, and spin ordering in the layered manganitePr0.5Ca1.5MnO4

Correlations between electronic order and structural distortions and their ultrafast dynamics in the single-layer manganite Pr0.5Ca1.5Mn
Porer
¹
,
Rettig
²
,
Bothschafter
³

et al. 2020
Phys. Rev. B
Self Cite
7
2
4
1
View full text Add to dashboard Cite

Enhanced Crystallization Behaviors of Silicon-Doped Sb2Te Films: Optical Evidences

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Temperature-dependent and anisotropic optical response of layered Pr0.5Ca1.5MnO4

Abstract: Temperature-dependent and anisotropic optical response of layered Pr0.5Ca1.5MnO4 probed by spectroscopic ellipsometry Majidi, M. A.; Thoeng, E.; Gogoi, P. K.; Wendt, F.; Wang, S. H.; Santoso, I.; Asmara, T. C.; Handayani, I. P.; van Loosdrecht, P. H. M.; Nugroho, A. A.

Cited by 13 publications

References 18 publications

Correlation between lattice vibrations with charge, orbital, and spin ordering in the layered manganitePr0.5Ca1.5MnO4

Correlation between lattice vibrations with charge, orbital, and spin ordering in the layered manganitePr0.5Ca1.5MnO4

Correlations between electronic order and structural distortions and their ultrafast dynamics in the single-layer manganite Pr0.5Ca1.5MnPorer1, Rettig2, Bothschafter3 et al. 2020Phys. Rev. BSelf Cite7241View full textAdd to dashboardCite

Enhanced Crystallization Behaviors of Silicon-Doped Sb2Te Films: Optical Evidences

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Correlations between electronic order and structural distortions and their ultrafast dynamics in the single-layer manganite Pr0.5Ca1.5Mn
Porer
¹
,
Rettig
²
,
Bothschafter
³

et al. 2020
Phys. Rev. B
Self Cite
7
2
4
1
View full text Add to dashboard Cite