The study of structure, electrophysical, physicomechanical and optical properties of GaAs with oxygen impurities and doped chromium

IF 2.8 3区物理与天体物理 Q2 PHYSICS, CONDENSED MATTER

Physica B-condensed Matter Pub Date : 2025-05-13 DOI:10.1016/j.physb.2025.417377

Mannab Tashmetov , Abror Abdaminov , Khabibulla Djangabaev , Oleg Tolbanov , Normamat Ismatov

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Abstract

The X-ray diffraction study of the GaAs(O):Cr sample showed that the structure is cubic (sp.gr. F-43m). Crystallite sizes and microstrain values were determined for each Miller indices, and the corresponding values were presented. Surface morphology analysis showed that the average width (R_a) and height (R_z) of the surface roughness over an area of 25 μm² of the single crystal were 13.7 nm and 94.1 nm, respectively. Microhardness increased from 108.2 HV to 219.2 HV in the load range of 10–100 g. The relationship between mobility, charge carrier concentration, and temperature (100–300 K) for GaAs(O):Cr was determined, and their values were presented. Fourier transform infrared (FTIR) spectroscopy showed local modes at 578, 620, 717, 733, 758, 815, and 946 cm⁻¹, which are related to optical phonon vibrations. As a result of studying the Raman spectra of the GaAs(O):Cr sample, peaks were detected at 267, 290, 328.4, and 560.4 cm⁻¹.

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含氧杂质和掺杂铬的砷化镓的结构、电物理、物理力学和光学性质的研究

对GaAs(O):Cr样品的x射线衍射研究表明，GaAs(O):Cr样品为立方（sp.gr）结构。F-43m)。测定了各Miller指数的晶粒尺寸和微应变值，并给出了相应的数值。表面形貌分析表明，25 μm2单晶表面粗糙度的平均宽度（Ra）和高度（Rz）分别为13.7 nm和94.1 nm。在10-100 g载荷范围内，显微硬度由108.2 HV增加到219.2 HV。测定了GaAs(O):Cr的迁移率、载流子浓度和温度（100-300 K）之间的关系，并给出了它们的取值。傅里叶变换红外光谱（FTIR）显示了578、620、717、733、758、815和946 cm−1的局部模式，这些模式与光学声子振动有关。研究了GaAs(O):Cr样品的拉曼光谱，分别在267,290,328.4和560.4 cm−1处检测到峰。

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来源期刊

Physica B-condensed Matter 物理-物理：凝聚态物理

CiteScore

4.90

自引率

7.10%

发文量

703

审稿时长

44 days

期刊介绍： Physica B: Condensed Matter comprises all condensed matter and material physics that involve theoretical, computational and experimental work. Papers should contain further developments and a proper discussion on the physics of experimental or theoretical results in one of the following areas: -Magnetism -Materials physics -Nanostructures and nanomaterials -Optics and optical materials -Quantum materials -Semiconductors -Strongly correlated systems -Superconductivity -Surfaces and interfaces