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Related Concept Videos

Types Of Superconductors01:28

Types Of Superconductors

A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
Superconductor01:24

Superconductor

A substance that reaches superconductivity, a state in which magnetic fields cannot penetrate, and there is no electrical resistance, is referred to as a superconductor. In 1911, Heike Kamerlingh Onnes of Leiden University, a Dutch physicist, observed a relation between the temperature and the resistance of the element mercury. The mercury sample was then cooled in liquid helium to study the linear dependence of resistance on temperature. It was observed that, as the temperature decreased, the...
Theory of Metallic Conduction01:17

Theory of Metallic Conduction

The conduction of free electrons inside a conductor is best described by quantum mechanics. However, a classical model makes predictions close to the results of quantum mechanics. It is called the theory of metallic conduction.
In this theory, Newton's second law of motion is used to determine the acceleration of an electron in the presence of an applied electric field. Then, its velocity is expressed via this acceleration.
An electron moves through the crystal, containing positive ions,...
Ferromagnetism01:31

Ferromagnetism

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...
Metal-Semiconductor Junctions01:24

Metal-Semiconductor Junctions

The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
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In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...

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Related Experiment Video

Updated: Jun 26, 2026

Writing and Low-Temperature Characterization of Oxide Nanostructures
06:43

Writing and Low-Temperature Characterization of Oxide Nanostructures

Published on: July 18, 2014

Reentrant superconductivity at an oxide heterointerface.

Denis Maryenko1, Minoru Kawamura1, Igor V Maznichenko2

  • 1RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan.

Science Advances
|June 24, 2026
PubMed
Summary
This summary is machine-generated.

A magnetic field can surprisingly enhance superconductivity in 2D systems. Researchers observed this reentrant superconductivity at a LaTiO3-KTaO3 interface, tunable via gating, suggesting novel physics.

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Last Updated: Jun 26, 2026

Writing and Low-Temperature Characterization of Oxide Nanostructures
06:43

Writing and Low-Temperature Characterization of Oxide Nanostructures

Published on: July 18, 2014

Tuning Oxide Properties by Oxygen Vacancy Control During Growth and Annealing
06:44

Tuning Oxide Properties by Oxygen Vacancy Control During Growth and Annealing

Published on: June 9, 2023

Comparison of Two Different Synthesis Methods of Single Crystals of Superconducting Uranium Ditelluride
04:51

Comparison of Two Different Synthesis Methods of Single Crystals of Superconducting Uranium Ditelluride

Published on: July 8, 2021

Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Quantum Phenomena

Background:

  • Magnetic fields typically suppress superconductivity through Zeeman effects or vortex formation.
  • Reentrant superconductivity, where superconductivity reappears under a magnetic field, is known in 3D but underexplored in 2D systems.
  • Moiré-patterned graphene is the sole known 2D system exhibiting this phenomenon.

Purpose of the Study:

  • To investigate reentrant superconductivity in two-dimensional (2D) systems beyond moiré graphene.
  • To explore the role of magnetic fields in stabilizing superconductivity at the LaTiO3-KTaO3 interface.
  • To understand the underlying mechanisms of unconventional superconductivity in engineered 2D heterostructures.

Main Methods:

  • Fabrication of epitaxial (110)-oriented LaTiO3-KTaO3 heterostructures.
  • In situ tuning of charge carrier densities using electrostatic gating.
  • Measurement of superconducting properties under varying magnetic fields and carrier concentrations.

Main Results:

  • Observation of reentrant superconductivity at the LaTiO3-KTaO3 interface across a broad range of tunable carrier densities.
  • Demonstration that electrostatic gating allows in situ control over this phenomenon, unlike in 3D materials.
  • Evidence suggesting the phenomenon arises from strong spin-orbit coupling and magnetic field-induced Fermi surface modifications.

Conclusions:

  • The LaTiO3-KTaO3 interface serves as a new platform for observing and studying reentrant superconductivity in 2D systems.
  • The findings highlight the potential for unconventional superconductivity driven by the interplay of spin-orbit coupling and magnetic fields in 2D materials.
  • This work opens avenues for exploring novel superconducting states in engineered heterostructures.