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Related Concept Videos

Spin–Spin Coupling: One-Bond Coupling01:17

Spin–Spin Coupling: One-Bond Coupling

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Coupling interactions are strongest between NMR-active nuclei bonded to each other, where spin information can be transmitted directly through the pair of bonding electrons. While nuclei polarize their electrons to the opposite spins, the bonding electron pair has opposite spins. Configurations with antiparallel nuclear spins are expected to be lower in energy. When coupling makes antiparallel states more favorable, J is considered to have a positive value. The one-bond coupling constant, 1J,...
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Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)01:20

Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)

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Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
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Ferromagnetism01:31

Ferromagnetism

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Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
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Valence Bond Theory02:42

Valence Bond Theory

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Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
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Atomic Nuclei: Nuclear Spin State Overview01:03

Atomic Nuclei: Nuclear Spin State Overview

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NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of...
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Spin–Spin Coupling Constant: Overview01:08

Spin–Spin Coupling Constant: Overview

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In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
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Related Experiment Video

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Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
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Interfacial Spin-Orbit-Coupling-Induced Strong Spin-to-Charge Conversion at an All-Oxide

Mi-Jin Jin1,2, Guang Yang2,3, Doo-Seung Um4

  • 1Center for Multidimensional Carbon Materials (CMCM), Institute for Basic Science (IBS), Ulsan 44919, Republic of Korea.

ACS Applied Materials & Interfaces
|March 13, 2025
PubMed
Summary

Functional oxides La1-CaMnO3/SrTiO3 exhibit efficient spin-to-charge conversion via the Rashba-Edelstein effect (REE). This all-oxide interface shows promise for developing thermally stable spintronic devices.

Keywords:
ferromagnetic resonanceoxide interfacespin Hall effectspin−charge conversionspin−orbit coupling

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Tuning Oxide Properties by Oxygen Vacancy Control During Growth and Annealing
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Tuning Oxide Properties by Oxygen Vacancy Control During Growth and Annealing
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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Spintronics

Background:

  • Functional oxides and hybrid structures are key for spintronic devices.
  • Interfacial spin-orbit coupling and the Rashba-Edelstein effect (REE) are crucial for spin-to-charge conversion.
  • Thermal tolerance is a critical requirement for practical spintronic applications.

Purpose of the Study:

  • To demonstrate efficient spin-to-charge conversion in an all-oxide heterostructure.
  • To investigate the role of interfacial spin-orbit coupling and REE in La1-CaMnO3/SrTiO3 (LCMO/STO) systems.
  • To explore the potential of LCMO/STO for thermally stable spintronic devices.

Main Methods:

  • Fabrication of an all-oxide interface between La1-CaMnO3 (LCMO) and quasi-two-dimensional (quasi-2D) SrTiO3 (STO).
  • Generation of a quasi-2D interface using oxygen vacancies at the STO surface.
  • Measurement of spin-to-charge conversion efficiency.

Main Results:

  • Achieved efficient spin-to-charge conversion with an efficiency of θ∥ ≈ 2.32 ± 1.3 nm.
  • Observed enhanced interfacial spin-orbit coupling at the LCMO/STO interface.
  • The conversion efficiency is attributed to the inverse Rashba-Edelstein effect, showing a significant value compared to metallic systems.

Conclusions:

  • The LCMO/STO 2D electron gas system exhibits efficient spin-to-charge conversion.
  • This all-oxide interface is a promising platform for developing thermally tolerant spintronic memory and transistor applications.
  • The findings highlight the potential of oxide heterostructures for advanced spintronics.