Optical properties of a<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Nd</mml:mi></mml:mrow><mml:mrow><mml:mn>0.7</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Sr</mml:mi></mml:mrow><mml:mrow><mml:mn>0.3</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">MnO</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml

Lee, H. J.; Jung, Jong Hoon; Lee, Yoon Sook; Ahn, J. S.; Noh, Tae Won; Kim, Kee Hoon; Cheong, Sang‐Wook

doi:10.1103/physrevb.60.5251

Cited by 77 publications

(47 citation statements)

References 28 publications

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“…For frequency regions above 20 eV, we extended reflectance at 20 eV -30 eV as a constant and then assumed ω -4 dependence. 28,29 We further confirmed that the results from ITMM and KK analyses using R(ω) were consistent. …”

Section: A Electronic Structure Of Mnwosupporting

confidence: 75%

Electronic structure and anomalous band-edge absorption feature in multiferroicMnWO4: An optical spectroscopic study

et al. 2010

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We investigated the electronic structure and lattice dynamics of multiferroic MnWO 4 by optical spectroscopy. With variation of polarization, temperature, and magnetic field, we obtained optical responses over a wide range of photon energies. The electronic structure of MnWO 4 near to the Fermi level was examined, with inter-band transitions identified in optical conductivity spectra above a band-gap of 2.5 eV. As for the lattice dynamics, we identified all the infrared transverse optical phonon modes available according to the group-theory analysis. Although we did not observe much change in global electronic structure across the phase transition temperatures, an optical absorption at around 2.2 eV showed an evident change depending upon the spin configuration and magnetic field. The behavior of this band-edge absorption indicates that spin-orbit coupling plays an important role in multiferroic MnWO 4 .

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Section: A Electronic Structure Of Mnwosupporting

confidence: 75%

Electronic structure and anomalous band-edge absorption feature in multiferroicMnWO4: An optical spectroscopic study

et al. 2010

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“…The observed temperature dependence is consistent with the theoretical approach by Millis et al, 4 who went beyond Zener's double exchange 5 and included dynamic JT polaron effects. Subsequent studies in crystalline 6,7,8,9 and thin film 10,11 samples confirmed the existence of the mid-infrared (MIR) excitation for a large number of manganites. In this context the concept of small (SP) and large polarons (LP) as essential ingredients to understand the electronic transport properties and the MIR excitation (labeled polaronic peak in the following) became subject of considerable theoretical efforts.…”

Section: Introductionmentioning

confidence: 88%

Polaronic excitations in colossal magnetoresistance manganite films

et al. 2006

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In the colossal magnetoresistance manganites polarons have been proposed as the charge carrier state which localizes across the metal-insulator transition. The character of the polarons is still under debate. We present an assessment of measurements which identify polarons in the metallic state of La 2/3 Sr 1/3 MnO3 (LSMO) and La 2/3 Ca 1/3 MnO3 (LCMO) thin films. We focus on optical spectroscopy in these films which displays a pronounced resonance in the mid-infrared. The temperature dependent resonance has been previously assigned to polaron excitations. These polaronic resonances are qualitatively distinct in LSMO and LCMO and we discuss large and small polaron scenarios which have been proposed so far. There is evidence for a large polaron excitation in LSMO and small polarons in LCMO. These scenarios are examined with respect to further experimental probes, specifically charge carrier mobility (Hall-effect measurements) and high-temperature dcresistivity.

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“…Optical microscopy studies confirmed that the bc-plane of our sample was very clean. Near normal incident reflectivity spectra R(ω) of the b-and c-axes were measured between 5 meV and 20 eV using polarized light [9]. The corresponding σ(ω) were obtained using Kramers-Kronig analysis.…”

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confidence: 99%

Orbital-Driven Electronic Structure Changes and the Resulting Optical Anisotropy of the Quasi-Two-Dimensional Spin Gap CompoundLa4Ru2O10

et al. 2008

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We investigated the electronic response of the quasi-two-dimensional spin gap compound La 4 Ru 2 O 10 using optical spectroscopy. We observed drastic changes in the optical spectra as the temperature decreased, resulting in anisotropy in the electronic structure of the spin-singlet ground state. Using the orbital-dependent hopping analysis, we found that orbital ordering plays a crucial role in forming the spin gap state in the non-one-dimensional material.

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Optical properties of aNd0.7Sr0.3MnO3

Cited by 77 publications

References 28 publications

Electronic structure and anomalous band-edge absorption feature in multiferroicMnWO4: An optical spectroscopic study

Electronic structure and anomalous band-edge absorption feature in multiferroicMnWO4: An optical spectroscopic study

Polaronic excitations in colossal magnetoresistance manganite films

Orbital-Driven Electronic Structure Changes and the Resulting Optical Anisotropy of the Quasi-Two-Dimensional Spin Gap CompoundLa4Ru2O10

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