Delving into the Electronic Properties of 122 Iron Pnictides: A Structural Carrier Perspective

Study of Electronic Properties of 122 Iron Pnictide Through Structural, Carrier-Doping, and Impurity-Scattering Effects (Springer Theses)

by Richard F. Yanda

4.2 out of 5

Language	:	English
File size	:	4249 KB
Text-to-Speech	:	Enabled
Print length	:	280 pages
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In the realm of condensed matter physics, the study of iron pnictides has captivated the scientific community. These materials have attracted immense interest due to their intriguing electronic properties, including superconductivity and magnetism. Among the various families of iron pnictides, the 122 iron pnictides have emerged as a particularly fascinating group.

The electronic properties of 122 iron pnictides are strongly influenced by their crystal structure. The unit cell of a 122 iron pnictide consists of three layers: two outer layers of iron atoms and a central layer of pnictogen atoms (such as arsenic or phosphorus). The arrangement of these layers gives rise to a unique electronic band structure that governs the material's behavior.

In this article, we will explore the electronic properties of 122 iron pnictides from a structural carrier perspective. We will investigate how the structural features of these materials affect their charge carrier concentration and, in turn, their electronic properties. We will also discuss the implications of these findings for the development of novel electronic devices.

Structural Features and Carrier Concentration

The structural features of 122 iron pnictides play a crucial role in determining their carrier concentration. The number of charge carriers in a material is directly related to its electrical conductivity and other electronic properties.

In 122 iron pnictides, the carrier concentration is primarily determined by the following factors:

• The type of pnictogen atom: The electronegativity of the pnictogen atom affects the charge transfer between the iron and pnictogen atoms. This charge transfer, in turn, influences the carrier concentration.
• The interlayer spacing: The distance between the iron and pnictogen layers affects the overlap of their electronic orbitals. This overlap influences the hybridization of the orbitals and the resulting band structure, which in turn affects the carrier concentration.
• The presence of defects and impurities: Defects and impurities can introduce additional charge carriers into the material, thereby affecting its carrier concentration.

Electronic Band Structure and Properties

The electronic band structure of a material provides a detailed description of its electronic properties. The band structure of 122 iron pnictides is characterized by the following features:

• A narrow band gap: The band gap is the energy difference between the valence band and the conduction band. In 122 iron pnictides, the band gap is typically narrow, indicating that the material is a good conductor of electricity.
• Multiple bands near the Fermi level: The Fermi level is the energy level at which the probability of finding an electron is 50%. In 122 iron pnictides, there are multiple bands near the Fermi level, indicating that the material has a high density of states.
• Strong electron correlations: The electrons in 122 iron pnictides interact strongly with each other, leading to a variety of interesting phenomena, such as superconductivity and magnetism.

The electronic band structure of 122 iron pnictides gives rise to the following electronic properties:

• High electrical conductivity: The narrow band gap and the high density of states near the Fermi level contribute to the high electrical conductivity of 122 iron pnictides.
• Superconductivity: Under certain conditions, 122 iron pnictides can become superconducting, exhibiting zero electrical resistance. This phenomenon is due to the strong electron correlations and the formation of Cooper pairs.
• Magnetism: Some 122 iron pnictides exhibit magnetic Free Downloading, such as ferromagnetism or antiferromagnetism. This behavior is due to the interplay between the electronic band structure and the spin-orbit interaction.

Implications for Electronic Devices

The unique electronic properties of 122 iron pnictides make them promising candidates for a variety of electronic applications, including:

• Superconducting wires and cables: The ability of 122 iron pnictides to become superconducting at relatively high temperatures makes them attractive for use in superconducting wires and cables. These wires could be used to transmit electricity with minimal losses, enabling the development of more efficient power grids.
• Spintronic devices: The magnetic properties of 122 iron pnictides make them suitable for use in spintronic devices, which exploit the spin of electrons for information storage and processing.
• Thermoelectric devices: The high electrical conductivity and the presence of multiple bands near the Fermi level make 122 iron pnictides promising materials for thermoelectric devices, which convert heat into electricity.

The electronic properties of 122 iron pnictides are a fascinating subject of research. The structural features of these materials have a profound impact on their charge carrier concentration and, in turn, their electronic properties. This understanding is crucial for the development of novel electronic devices that exploit the unique properties of 122 iron pnictides.

As research into 122 iron pnictides continues, we can expect to gain even deeper insights into their electronic behavior. These insights will undoubtedly lead to the development of new and exciting technologies that will revolutionize our electronic world.

References

• Structural and electronic properties of BaFe2As2 from first principles
• Electronic Structure and Magnetism of 122 Iron Pnictides: A Review of Theoretical Calculations
• High-temperature superconductivity in iron pnictides: an experimental review

Study of Electronic Properties of 122 Iron Pnictide Through Structural, Carrier-Doping, and Impurity-Scattering Effects (Springer Theses)

by Richard F. Yanda

4.2 out of 5

Language	:	English
File size	:	4249 KB
Text-to-Speech	:	Enabled
Print length	:	280 pages
Screen Reader	:	Supported

FREE