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Related Concept Videos

Determination of Crystal Structures01:29

Determination of Crystal Structures

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In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...
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Imperfections in Crystal Structure: Stoichiometric Point Defects01:26

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Schottky defects arise when some lattice points in a crystal, such as those in NaCl, remain unoccupied, creating lattice vacancies without disturbing the overall electrical neutrality of the crystal. This defect is common in ionic crystals where the positive and negative ions are similar in size, as seen in sodium chloride and cesium chloride. The presence of Schottky defects enables the crystal to conduct electricity to a small extent through an ionic mechanism. Electric fields cause nearby...
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Imperfections in Crystal Structure: Non-Stoichiometric Defects01:29

Imperfections in Crystal Structure: Non-Stoichiometric Defects

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Non-stoichiometric defects refer to a type of defect in the crystal structure of a compound where the ratio of its constituent elements deviates from the ideal stoichiometric ratio. There are two main types of non-stoichiometric defects: metal excess defects and metal deficiency defects.Metal excess defects occur when there is a slight surplus of metal ions than what is required by the stoichiometric ratio of the compound. For example, heating a sodium chloride crystal in sodium vapor results...
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Updated: May 6, 2026

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Chemically-Disordered Transparent Conductive Perovskites With High Crystalline Fidelity.

Saeed S I Almishal1, Pat Kezer2, Jacob T Sivak3

  • 1Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA, 16802, USA.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|July 12, 2025
PubMed
Summary
This summary is machine-generated.

High-entropy perovskites with diverse elements show tunable properties. This study models chemical disorder to design advanced materials for optical and electronic devices.

Keywords:
DFTTEMXPSXRDcluster expansiondisorderelectron correlationhigh‐entropy oxidesperovskitesthin filmstransparent conductors

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Area of Science:

  • Materials Science
  • Solid State Physics
  • Solid State Chemistry

Background:

  • Correlated-electron perovskites are crucial for advanced devices.
  • Designing these materials with tailored properties remains challenging.
  • High-entropy formulations offer a vast, underexplored design space.

Purpose of the Study:

  • To develop a model linking chemical disorder and transport properties in high-entropy perovskites.
  • To establish a framework for actively designing these complex materials.
  • To explore the potential of unusual d-metal combinations for expanded device performance.

Main Methods:

  • Epitaxial thin film synthesis of Srx(Ti,Cr,Nb,Mo,W)O3.
  • Characterization using X-ray diffraction, X-ray photoelectron spectroscopy, and transmission electron microscopy.
  • Computational modeling including cluster expansion for short-range ordering analysis.

Main Results:

  • Demonstrated exceptional crystalline fidelity in highly disordered, high-entropy perovskite films.
  • Observed an expanded optical transparency window (UV and IR) and low electrical resistivity.
  • Confirmed that material properties are predictable using end-member characteristics.

Conclusions:

  • A working model for designing high-entropy perovskites based on chemical disorder and properties has been established.
  • These materials offer significant performance advances for optical, high-frequency, spintronic, and quantum devices.
  • The study highlights the potential of d-metal combinations in expanding the materials design space.