Quasiparticle Mass Enhancement and Temperature Dependence of the Electronic Structure of Ferromagnetic<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>SrRuO</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:math>Thin Films

Shai, Daniel; Adamo, Carolina; Shen, Dawei; Brooks, Charles M.; Harter, John; Monkman, Eric; Burganov, Bulat; Schlom, D. G.; Shen, Kyle

doi:10.1103/physrevlett.110.087004

Cited by 101 publications

(95 citation statements)

References 38 publications

(42 reference statements)

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“…The large hole pocket at k=Z is indeed observed in the ARPES experiment. [12] As shown in the SM, the orbital character of this hole pocket at k=Z is xy and yz, which is consistent with the suggestion from the ARPES experiment. [12,29,34] On the other hand, ARPES shows a kink feature in the spectral function at 65 meV below E F along Γ and Z.…”

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confidence: 88%

Nature of itinerant ferromagnetism ofSrRuO3: A DFT+DMFT study

Kim

Min

2015

Phys. Rev. B

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We have investigated the temperature (T )-dependent evolution of electronic structures and magnetic properties of an itinerant ferromagnet SrRuO3, employing the combined scheme of the density functional theory and the dynamical mean-field theory (DFT+DMFT). The inclusion of finite dynamical correlation effects beyond the DFT well describes not only the incoherent hump structure observed in the photoemission experiment but also the T -dependent magnetic properties in accordance with experiments. We have shown that the magnetization of SrRuO3 evolves with the Stoner behavior below the Curie temperature (Tc), reflecting the weak itinerant ferromagnetic behavior, but the local residual magnetic moment persists even above Tc, indicating the local magnetic moment behavior. We suggest that the ferromagnetism of SrRuO3 has dual nature of both weak and local moment limits, even though the magnetism of SrRuO3 is more itinerant than that of Fe.

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confidence: 88%

Nature of itinerant ferromagnetism ofSrRuO3: A DFT+DMFT study

Kim

Min

2015

Phys. Rev. B

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“…In addition, the photoemission and optical conductivity measurements have recently revealed that the duality of itinerant and localized natures appears even in pure SrRuO 3 . 49,50) The δ values estimated from the frequency dependence of T * indicate that the low temperature ordered phase for x ≥ 0.3 can not be realized to a spin-glass but a cluster-glass state. Furthermore, the present dc-magnetization curves measured in the field cooled conditions are clearly incompatible with those expected from the spin-glass system ( Fig.…”

Section: Discussionmentioning

confidence: 99%

Ferromagnetic Cluster-Glass State in Itinerant Electron System Sr₁₋_xLa_xRuO₃

et al. 2014

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The magnetic and electronic properties of Sr 1−x La x RuO 3 were studied by means of dc-magnetization, acsusceptibility, specific heat, and electrical resistivity measurements. The dc-magnetization and ac-susceptibility measurements have revealed that the transition temperature and the ordered moment of the ferromagnetic order are strongly suppressed as La is substituted for Sr. The ac-susceptibility exhibits a peak at T * due to the occurrence of spontaneous spin polarization. Furthermore, we observed that T * shows clear frequency variations for x ≥ 0.3. The magnitude of the frequency shifts of T * is comparable to that of cluster-glass systems, and the frequency dependence is well described in terms of the Vogel-Fulcher law. On the other hand, it is found that the linear specific heat coefficient γ enhances with the suppression of the ferromagnetic order. The relatively large γ values reflect the presence of the Ru 4d state at Fermi level, and hence, the magnetism of this system is considered to be tightly coupled with the itinerant characteristics of the Ru 4d electrons. The present experimental results and analyses suggest that the intrinsic coexistence of the spatially inhomogeneous magnetic state and the itinerant nature of the Ru 4d electrons is realized in this system, and such a feature may be commonly involved in La-and Ca-doped SrRuO 3 .

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“…However, we have strong reasons to believe that a significant part of the experimental mass enhancement comes from electron-boson coupling. In fact, recent ARPES measurements by Shai et al 42 reveal a kink in the spectra, in the vicinity of the Fermi level, which is a text-book example of electron-boson coupling, most likely magnons. This contribution is not considered in the single-site LDA+DMFT approach, which includes uniquely electronic contributions.…”

Section: Effects Of On-site Coulomb Interactionmentioning

confidence: 99%

Electronic structure, cohesive properties, and magnetism ofSrRuO3

et al. 2014

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We have performed an extensive test of the ability of density functional theory within several approximations for the exchange-correlation functional, local density approximation+Hubbard U and local density approximation + dynamic mean field theory to describe magnetic and electronic properties of SrRuO3. We focus on the ferromagnetic phase, illustrating differences between the orthorhombic low temperature structure vs the cubic high temperature structure. We assess how magnetism, spectral function, and cohesive properties are affected by methodology, on-site Hubbard U and double counting corrections. Further, we compare the impact of the impurity solver on the quasiparticle weight Z, which is in turn compared to experimental results. The spectral functions resulting from the different treatments are also compared to experimental data. Finally, the impact of spin-orbit coupling is studied, allowing us to determine the orbital moments. In the orthorhombic phase the orbital moments are found to be tilted with respect to the spin moments, emphasising the importance of taking into account the distortion of the oxygen octahedra.

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Quasiparticle Mass Enhancement and Temperature Dependence of the Electronic Structure of FerromagneticSrRuO3Thin Films

Cited by 101 publications

References 38 publications

Nature of itinerant ferromagnetism ofSrRuO3: A DFT+DMFT study

Nature of itinerant ferromagnetism ofSrRuO3: A DFT+DMFT study

Ferromagnetic Cluster-Glass State in Itinerant Electron System Sr₁₋_xLa_xRuO₃

Electronic structure, cohesive properties, and magnetism ofSrRuO3

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Quasiparticle Mass Enhancement and Temperature Dependence of the Electronic Structure of FerromagneticSrRuO3Thin Films

Cited by 101 publications

References 38 publications

Nature of itinerant ferromagnetism ofSrRuO3: A DFT+DMFT study

Nature of itinerant ferromagnetism ofSrRuO3: A DFT+DMFT study

Ferromagnetic Cluster-Glass State in Itinerant Electron System Sr1−xLaxRuO3

Electronic structure, cohesive properties, and magnetism ofSrRuO3

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Ferromagnetic Cluster-Glass State in Itinerant Electron System Sr₁₋_xLa_xRuO₃