化学結合は大量結晶の1次元の物理を誘導する
Connor J Pollak1, Grigorii Skorupskii1, Martin Gutierrez-Amigo2,3,4
1Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States.
Journal of the American Chemical Society
|March 2, 2024
まとめ
研究者は1Dの電子特性を有する 3D結晶を作成するために 化学的概念を開発しました BiIr4Se8はユニークな1次元 (1D) 行動を示し,このアプローチを新しい電子材料で検証しています.
科学分野:
- 凝縮物質物理学
- 材料科学
- 固体化学
背景:
- 一次元の (1D) システムは,自由度が制限されているため,豊かな物理学を提供します.
- 散発材料で真の 1D 電子的振る舞いを達成することは,連鎖間の相互作用のために困難です.
- 既存の準1D材料は理想化された1Dモデルから逸脱することが多い.
研究 の 目的:
- 3Dの水晶で1Dの物理学を実現するための化学設計の原理を確立する.
- BiIr4Se8を電子的に1D素材の主要な例として提示し,検証する.
- 新しい準1D化合物の合成と特徴を証明する.
主な方法:
- クリスタル構造分析とX線微分
- 密度関数理論 (DFT) の計算
- 物理的な性質の測定
主要な成果:
- BiIr4Se8は,IrSe6の八面体枠内に線形Bi2+鎖を配置し,1Dの電子構造を作成しています.
- 周囲の温度では,BiIr4Se8は,ピアルズ歪み (Bi二分化) により,ギャップされたSu-Schriefer-Heegerシステムとして振る舞う.
- 190Kで1Dの電荷密度波の歪みが追加され,ピエルス歪みに影響する.
結論:
- この研究は,電子的に1D素材を作成するための提案された化学設計原理を検証します.
- BiIr4Se8は他の準-1D化合物とは異なる重要な例として用いられる.
- 大量の3D結晶構造の中で ユニークな1D電子特性を設計することが可能である.
さらに関連する動画
関連する概念動画
02:54Molecular and Ionic Solids
17.1K
Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
17.1K
03:24Hybridization of Atomic Orbitals I
47.1K
The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
47.1K
02:32Bonding in Metals
47.3K
Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”.
47.3K
02:18X-ray Crystallography
23.9K
The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
23.9K
03:00Intermolecular vs Intramolecular Forces
87.3K
Intermolecular forces (IMF) are electrostatic attractions arising from charge-charge interactions between molecules. The strength of the intermolecular force is influenced by the distance of separation between molecules. The forces significantly affect the interactions in solids and liquids, where the molecules are close together. In gases, IMFs become important only under high-pressure conditions (due to the proximity of gas molecules). Intermolecular forces dictate the physical properties of...
87.3K
02:40Chemical Bonds
16.5K
Atoms participate in a chemical bond formation to acquire a completed valence-shell electron configuration similar to that of the noble gas nearest to it in atomic number. Ionic, covalent, and metallic bonds are some of the important types of chemical bonds. Bond energy and bond length determine the strength of a chemical bond.
Types of Chemical Bonds
An ionic bond is formed due to electrostatic attraction between cations and anions. Often, the ions are formed by the transfer of electrons...
16.5K