Spectral weight transfer in strongly correlated<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Fe</mml:mi><mml:mrow><mml:mn>1.03</mml:mn></mml:mrow></mml:msub><mml:mi>Te</mml:mi></mml:mrow></mml:math>

Dai, Y. M.; Akrap, Ana; Schneeloch, John; Zhong, Ruidan; Liu, T. S.; Gu, Genda; Li, Qiang; Homes, C. C.

doi:10.1103/physrevb.90.121114

Cited by 19 publications

(24 citation statements)

References 31 publications

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“…where the relations between the tensor meson TFFs T (Λ) extracted in [15] and the ones used in fixed from the real photon point, according to Ref. [22]. The values of the coupling constants for the Λ = 1 and Λ = (0, L) states are determined by saturating sum rules SR 2 and SR 3 as discussed in Section IV.…”

Section: Empirical Parametrizations Of Meson Tffsmentioning

confidence: 99%

Light-by-light scattering sum rules in light of new data

2017

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We evaluate the light-quark meson contributions to three exact light-by-light scattering sum rules in light of new data by the Belle Collaboration, which recently has extracted the transition form factors of the tensor meson $f_2(1270)$ as well as of the scalar meson $f_0(980)$. We confirm a previous finding that the $\eta, \eta^\prime$ and helicity-2 $f_2(1270)$ contributions saturate one of these sum rules up to photon virtualities around 1 GeV$^2$. At larger virtualities, our sum rule analysis shows an important contribution of the $f_2(1565)$ meson and provides a first empirical extraction of its helicity-2 transition form factor. Two further sum rules allow us to predict the helicity-0 and helicity-1 transition form factors of the $f_2(1270)$ meson. Furthermore, our analysis also provides an update for the scalar and tensor meson hadronic light-by-light contributions to the muon's anomalous magnetic moment.Comment: 21 pages, 4 figure

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Section: Empirical Parametrizations Of Meson Tffsmentioning

confidence: 99%

Light-by-light scattering sum rules in light of new data

2017

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“…In this work we examine the optical properties of Fe 1.03 Te (T N ≃ 68 K) and Fe 1.13 Te (T N ≃ 56 K) above and below T N , as well as FeTe 0.55 Se 0.45 (T c ≃ 14 K), and determine the detailed temperature dependence of the position, width, strength and asymmetry parameter of the infrared-active mode using an asymmetric (Fano) line shape; in several cases the electronic properties of these materials have been previously discussed by us [19][20][21]. In both Fe 1+δ Te materials the infrared-active mode displays a slight asymmetry, suggesting either spinor electron-phonon coupling, and increases in frequency with decreasing temperature, as expected for an anharmonic decay process; below T N the mode undergoes an anomalous decrease in frequency at T N and the asymmetry parameter decreases, indicating reduced coupling.…”

Section: Introductionmentioning

confidence: 99%

“…The substitution of Se for Te in FeTe 1−x Se x suppresses the structural and magnetic transition and results in a superconducting phase for a broad range of compositions [12,13], with a maximum critical temperature of T c ≃ 14 K [14][15][16][17]. The optical and transport properties of Fe 1+δ Te and FeTe 1−x Se x have been investigated [17][18][19][20][21][22][23] and in addition there have been a number of reports on the vibrational properties of these materials; however, only the Raman-active modes have been studied [24][25][26][27][28], leaving the infrared-active modes largely unexplored. * homes@bnl.gov † ymdai@lanl.gov; Los Alamos National Laboratory, Center for Integrated Nanotechnologies, MPA-CINT, MS K771, Los Alamos, New Mexico 87545, USA…”

Section: Introductionmentioning

confidence: 99%

Phonon anomalies in some iron telluride materials

et al. 2016

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The detailed temperature dependence of the infrared-active mode in Fe1.03Te (TN ≃ 68 K) and Fe1.13Te (TN ≃ 56 K) has been examined, and the position, width, strength, and asymmetry parameter determined using an asymmetric Fano profile superimposed on an electronic background. In both materials the frequency of the mode increases as the temperature is reduced; however, there is also a slight asymmetry in the line shape, indicating that the mode is coupled to either spin or charge excitations. Below TN there is an anomalous decrease in frequency and the mode shows little temperature dependence, at the same time becoming more symmetric, suggesting a reduction in spin-or electron-phonon coupling. The frequency of the infrared-active mode and the magnitude of the shift below TN are predicted reasonably well by first-principles calculations; however, the predicted splitting of the mode is not observed. In superconducting FeTe0.55Se0.45 (Tc ≃ 14 K) the infrared-active Eu mode displays asymmetric line shape at all temperatures, which is most pronounced between 100 − 200 K, indicating the presence of either spin-or electron-phonon coupling, which may be a necessary prerequisite for superconductivity in this class of materials.

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“…An explanation of experimental techniqueps and additional discussion are presented in the Supplemental Material (SM) (11). Sr 2 IrO 4 is the archetype, SOI-driven insulator (9) with T N = 240 K (3,4,5,6), and an electronic energy gap D < 0.62 eV (9,12,13,14,15). It crystallizes in a tetragonal structure with space-group I4 1 /acd (No.…”

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confidence: 99%

Electrical Control of Structural and Physical Properties via Strong Spin-Orbit Interactions in Sr2IrO4

et al. 2018

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Electrical control of structural and physical properties is a long-sought, but elusive goal of contemporary science and technology. We demonstrate that a combination of strong spin-orbit interactions (SOI) and a canted antiferromagnetic Mott state is sufficient to attain that goal. The antiferromagnetic insulator Sr_{2}IrO_{4} provides a model system in which strong SOI lock canted Ir magnetic moments to IrO_{6} octahedra, causing them to rigidly rotate together. A novel coupling between an applied electrical current and the canting angle reduces the Néel temperature and drives a large, nonlinear lattice expansion that closely tracks the magnetization, increases the electron mobility, and precipitates a unique resistive switching effect. Our observations open new avenues for understanding fundamental physics driven by strong SOI in condensed matter, and provide a new paradigm for functional materials and devices.

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Spectral weight transfer in strongly correlatedFe1.03Te

Cited by 19 publications

References 31 publications

Light-by-light scattering sum rules in light of new data

Light-by-light scattering sum rules in light of new data

Phonon anomalies in some iron telluride materials

Electrical Control of Structural and Physical Properties via Strong Spin-Orbit Interactions in Sr2IrO4

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