Observation of Kondo hybridization with an orbital-selective Mott phase in 4d Ca2-xSrxRuO4

Kim, Min‐Soo; Kwon, Junyoung; Kim, Choong Hyun; Chung, Daun; Kim, Younsik; Ryu, Hanyoung; Jung, Jongkeun; Kim, Beom Seo; Song, Dongjoon; Denlinger, Jonathan D.; Han, Mei; Yoshida, Yoshiyuki; Mizokawa, T.; Kyung, Wonshik; Kim, Changyoung

doi:10.21203/rs.3.rs-48339/v1

Cited by 5 publications

(9 citation statements)

References 52 publications

(119 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, we may refer to the electronic state of monolayer SRO as an orbital-selectively correlated and incoherent metal. The orbital selective correlated metallic behavior should be closely related to the orbital-selective Mott phase found in Ca 2−x Sr x RuO 4 35 .…”

Section: Resultsmentioning

confidence: 73%

See 1 more Smart Citation

Observation of metallic electronic structure in a single-atomic-layer oxide

Sohn

Kim

et al. 2021

Nat Commun

Self Cite

View full text Add to dashboard Cite

Correlated electrons in transition metal oxides exhibit a variety of emergent phases. When transition metal oxides are confined to a single-atomic-layer thickness, experiments so far have shown that they usually lose diverse properties and become insulators. In an attempt to extend the range of electronic phases of the single-atomic-layer oxide, we search for a metallic phase in a monolayer-thick epitaxial SrRuO3 film. Combining atomic-scale epitaxy and angle-resolved photoemission measurements, we show that the monolayer SrRuO3 is a strongly correlated metal. Systematic investigation reveals that the interplay between dimensionality and electronic correlation makes the monolayer SrRuO3 an incoherent metal with orbital-selective correlation. Furthermore, the unique electronic phase of the monolayer SrRuO3 is found to be highly tunable, as charge modulation demonstrates an incoherent-to-coherent crossover of the two-dimensional metal. Our work emphasizes the potentially rich phases of single-atomic-layer oxides and provides a guide to the manipulation of their two-dimensional correlated electron systems.

show abstract

Section: Resultsmentioning

confidence: 73%

“…In the monolayer SRO case, the spin splitting is inhibited due to the QC effect. As a result, the d xy DOS at the Fermi level is reduced via opening a soft gap35 . When VHS is far from the Fermi level, the coherent states can be recovered.…”

mentioning

confidence: 99%

Observation of metallic electronic structure in a single-atomic-layer oxide

Sohn

Kim

et al. 2021

Nat Commun

Self Cite

View full text Add to dashboard Cite

show abstract

“…As the system evolves into an OSMP, the hybridization between the electrons belonging to the strongly localized orbitals and the itinerant orbitals gradually turns off, leading to a reconstruction of the fermiology. In the larger context of quantum materials, evidence for OSMP has been reported for Ca 2−x Sr x RuO 4 [28][29][30] , VO 2 31 , and a transition metal dichalcogenide 32 , in the form of strongly orbital-selective mass enhancement and spectral weight gapped out at the Fermi level 29,[33][34][35][36][37] . However, continuous evolution of Fermi surface reconstruction across an OSMP has been challenging to show for any material system, and has only recently been reported for Ca 2−x Sr x RuO 4 30 .…”

mentioning

confidence: 99%

Correlation-driven electronic reconstruction in FeTe1−xSex

Huang

et al. 2022

Commun Phys

View full text Add to dashboard Cite

Electronic correlation is of fundamental importance to high temperature superconductivity. While the low energy electronic states in cuprates are dominantly affected by correlation effects across the phase diagram, observation of correlation-driven changes in fermiology amongst the iron-based superconductors remains rare. Here we present experimental evidence for a correlation-driven reconstruction of the Fermi surface tuned independently by two orthogonal axes of temperature and Se/Te ratio in the iron chalcogenide family FeTe1−xSex. We demonstrate that this reconstruction is driven by the de-hybridization of a strongly renormalized dxy orbital with the remaining itinerant iron 3d orbitals in the emergence of an orbital-selective Mott phase. Our observations are further supported by our theoretical calculations to be salient spectroscopic signatures of such a non-thermal evolution from a strongly correlated metallic phase into an orbital-selective Mott phase in dxy as Se concentration is reduced.

show abstract

“…As the system evolves into an OSMP, the hybridization between the electrons belonging to the strongly localized orbitals and the itinerant orbitals gradually turns off, leading to a reconstruction of the fermiology. In the larger context of quantum materials, evidence for OSMP has been reported for Ca 2−x Sr x RuO 4 [27][28][29], VO 2 [30], and a transition metal dichalcogenide [31], in the form of strongly orbital-selective mass enhancement and spectral weight gapped out at the Fermi level [28,[32][33][34][35][36]. However, continuous evolution of Fermi surface reconstruction across an OSMP has been challenging to show for any material system, and has only recently been reported for Ca 2−x Sr x RuO 4 [29].…”

Section: Introductionmentioning

confidence: 99%

Correlation-Driven Electronic Reconstruction in FeTe$_{1-x}$Se$_x$

Huang,

Yu,

et al. 2022

Preprint

View full text Add to dashboard Cite

Electronic correlation is of fundamental importance to high temperature superconductivity.While the low energy electronic states in cuprates are dominantly affected by correlation effects across the phase diagram, observation of correlation-driven changes in fermiology amongst the ironbased superconductors remains rare. Here we present experimental evidence for a correlation-driven reconstruction of the Fermi surface tuned independently by two orthogonal axes of temperature and Se/Te ratio in the iron chalcogenide family FeTe 1−x Se x . We demonstrate that this reconstruction is driven by the de-hybridization of a strongly renormalized d xy orbital with the remaining itinerant iron 3d orbitals in the emergence of an orbital-selective Mott phase. Our observations are further supported by our theoretical calculations to be salient spectroscopic signatures of such a non-thermal evolution from a strongly correlated metallic phase into an orbital-selective Mott phase in d xy as Se concentration is reduced.

show abstract

Observation of Kondo hybridization with an orbital-selective Mott phase in 4d Ca2-xSrxRuO4

Cited by 5 publications

References 52 publications

Observation of metallic electronic structure in a single-atomic-layer oxide

Observation of metallic electronic structure in a single-atomic-layer oxide

Correlation-driven electronic reconstruction in FeTe1−xSex

Correlation-Driven Electronic Reconstruction in FeTe$_{1-x}$Se$_x$

Contact Info

Product

Resources

About