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Related Concept Videos

Valence Bond Theory02:42

Valence Bond Theory

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...
Spin–Spin Coupling: One-Bond Coupling01:17

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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,...
Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
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Spin–Spin Coupling Constant: Overview01:08

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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.
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must have a...
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)01:20

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Tuning Oxide Properties by Oxygen Vacancy Control During Growth and Annealing
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Tunable Rashba spin-orbit interaction at oxide interfaces.

A D Caviglia1, M Gabay, S Gariglio

  • 1Département de Physique de la Matière Condensée, University of Geneva, 24 Quai Ernest-Ansermet, 1211 Genève 4, Switzerland.

Physical Review Letters
|April 7, 2010
PubMed
Summary
This summary is machine-generated.

The LaAlO3/SrTiO3 interface hosts a tunable Rashba spin-orbit interaction, crucial for nanoelectronics. This interaction significantly increases near the quantum critical point separating insulating and superconducting states.

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Last Updated: Jun 14, 2026

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Area of Science:

  • Condensed matter physics
  • Materials science
  • Nanoscience

Background:

  • The LaAlO3/SrTiO3 interface exhibits a quasi-two-dimensional electron gas with unique electronic properties.
  • Inversion symmetry breaking at interfaces can lead to significant spin-orbit interactions.
  • This system is a promising platform for novel nanoelectronic devices and tunable superconductivity.

Purpose of the Study:

  • To investigate the Rashba spin-orbit interaction at the LaAlO3/SrTiO3 interface.
  • To explore the modulation of this interaction by an external electric field.
  • To understand the behavior of spin-orbit coupling across the system's phase diagram.

Main Methods:

  • Magnetotransport experiments were conducted.
  • The evolution of spin-orbit coupling was studied across the phase diagram.
  • The system's electronic properties were analyzed.

Main Results:

  • A large Rashba spin-orbit interaction was observed, tunable by an electric field.
  • A steep increase in Rashba interaction was identified near the quantum critical point.
  • This rise occurs at the doping level separating insulating and superconducting states.

Conclusions:

  • The LaAlO3/SrTiO3 interface exhibits a tunable Rashba spin-orbit interaction.
  • This interaction is strongly linked to the quantum critical point and phase transitions.
  • The findings offer new insights for designing advanced nanoelectronic devices.