Origins of Thermal Spin Depolarization in Half-Metallic Ferromagnet 
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While the pseudogap dominates the phase diagram of hole-doped cuprates, connecting the antiferromagnetic parent insulator at low doping to the strange metal at higher doping, its origin and relation to superconductivity remains unknown. In order to proceed, a complete understanding of how the single hole–initially localized in the Mott state–becomes mobile and ultimately evolves into a coherent quasiparticle at the end of the superconducting dome is required. In order to affect this development, we examine recent transport and spectroscopic studies of hole-doped cuprates across their phase diagram. In the process, we highlight a set of empirical correlations between the superfluid density and certain normal state properties of hole-doped cuprates that offer fresh insights into the emergence of metallicity within the CuO2 plane and its influence on the robustness of the superconducting state. We conclude by arguing that the overall behavior is best understood in terms of two distinct current-carrying fluids, only one of which dominates the superconducting condensate and is gapped out below the pseudogap endpoint at a critical hole concentration p∗.

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“…Nevertheless, they may contribute to photoemission and scanning probe spectra, tunneling, etc. [47], as confirmed experimentally [48,49].…”

Section: Theoretical Considerationssupporting

confidence: 69%

Superfluid density and two-component conductivity in hole-doped cuprates

2022

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“…The optimized crystal structures and considered AFM configurations are presented in Figures S9 and S10, Supporting Information, as well. Among them, 11 candidates, Cr 2 Ge 2 Te 6 , [ 3 ] Fe 3 GeTe 2 , [ 4a ] CrWI 6 , [ 6c ] VO 2 , [ 24 ] VAg(PSe 3 ) 2 , [ 7b ] CrO 2 , [ 25 ] CrPTe 3 , [ 7b ] YCl, [ 14 ] CrSiTe 3 , [ 26 ] CrOF, [ 27 ] and CrPS 4 [ 28 ] have been successfully synthesized experimentally or predicted by previous first‐principles calculations. These prove the reliability of our ML method.…”

Section: Figurementioning

confidence: 99%

Coupling a Crystal Graph Multilayer Descriptor to Active Learning for Rapid Discovery of 2D Ferromagnetic Semiconductors/Half‐Metals/Metals

et al. 2020

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2D ferromagnetic (FM) semiconductors/half‐metals/metals are the key materials toward next‐generation spintronic devices. However, such materials are still rather rare and the material search space is too large to explore exhaustively. Here, an adaptive framework to accelerate the discovery of 2D intrinsic FM materials is developed, by combining advanced machine‐learning (ML) techniques with high‐throughput density functional theory calculations. Successfully, about 90 intrinsic FM materials with desirable bandgap and excellent thermodynamic stability are screened out and a database containing 1459 2D magnetic materials is set up. To improve the performance of ML models on small‐scale datasets like diverse 2D materials, a crystal graph multilayer descriptor using the elemental property is proposed, with which ML models achieve prediction accuracy over 90% on thermodynamic stability, magnetism, and bandgap. This study not only provides dozens of compelling FM candidates for future spintronics, but also paves a feasible route for ML‐based rapid screening of diverse structures and/or complex properties.

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“…In principle, the issue may be addressed with spindependent electronic structure information from spin-and angle-resolved photoemission spectroscopy (SARPES) measurements [22]. Verification of such characteristics in a spinand momentum-resolved way would be an important step towards understanding the ferromagnetism in SRO as well as other materials [23].…”

mentioning

confidence: 99%

“…The spin-split bands are expected to have strong temperature-dependent behaviors [22,37], especially approaching the Curie temperature (T C ). Figure 3(a) shows the high-symmetry cuts along the Γ-X direction at 10 and 160 K, below and above T C (See SM [38] for the Γ-M cut).…”

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confidence: 99%

Observation of spin-dependent dual ferromagnetism in perovskite ruthenates

Hahn,

Sohn,

Kim

et al. 2021

Preprint

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We performed in-situ angle-resolved photoemission spectroscopy (ARPES) and spin-resolved ARPES (SARPES) experiments to investigate the relationship between electronic band structures and ferromagnetism in SrRuO3 (SRO) thin films. Our high quality ARPES and SARPES results show clear spin-lifted band structures. The spin polarization is strongly dependent on momentum around the Fermi level, whereas it becomes less dependent at high-binding energies. This experimental observation matches our dynamical mean-field theory (DMFT) results very well. As temperature increases from low to the Curie temperature, spin-splitting gap decreases and band dispersions become incoherent. Based on the ARPES study and theoretical calculation results, we found that SRO possesses spin-dependent electron correlations in which majority and minority spins are localized and itinerant, respectively. Our finding explains how ferromagnetism and electronic structure are connected, which has been under debate for decades in SRO.

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Origins of Thermal Spin Depolarization in Half-Metallic Ferromagnet CrO2

Cited by 10 publications

References 48 publications

Superfluid density and two-component conductivity in hole-doped cuprates

Superfluid density and two-component conductivity in hole-doped cuprates

Coupling a Crystal Graph Multilayer Descriptor to Active Learning for Rapid Discovery of 2D Ferromagnetic Semiconductors/Half‐Metals/Metals

Observation of spin-dependent dual ferromagnetism in perovskite ruthenates

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