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Updated: Jan 19, 2026

Semiconductors and Characteristics of P-N Junctions

Semiconductors and Characteristics of P-N Junctions

Published on: April 30, 2023

Two dimensional ferromagnetic semiconductor: monolayer CrGeS₃.

Yulu Ren¹, Yanfeng Ge¹, Wenhui Wan¹

¹State Key Laboratory of Metastable Materials Science and Technology & Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, People's Republic of China.

Journal of Physics. Condensed Matter : an Institute of Physics Journal

|September 12, 2019

Summary

Monolayer CrGeS3 exhibits a ferromagnetic ground state with a Curie temperature of 161 K, making it a promising material for spintronic devices.

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Ferromagnetism

Ferromagnetism

Area of Science:

Condensed Matter Physics
Materials Science
Quantum Chemistry

Background:

Two-dimensional (2D) ferromagnetic semiconductors are crucial for advancing spintronic devices.
Exploring novel 2D materials with tailored magnetic and electronic properties is essential.

Purpose of the Study:

To investigate the magnetic and electronic properties of monolayer Chromium Germanium Trisulfide (CrGeS3).
To determine the ground state magnetic ordering and potential for spintronic applications.

Main Methods:

Density Functional Theory (DFT) calculations were employed.
Analysis of electronic band structure, exchange splitting, and total energies for different magnetic configurations.
Mean-field theory was used to estimate the Curie temperature.

Main Results:

Monolayer CrGeS3 exhibits distinct spin-up (1.01 eV) and spin-down (1.07 eV) bandgaps.
Significant exchange splitting (0.67 eV, 2.21 eV with HSE06) arises from Cr-S and Cr-Ge hybridized states.
A ferromagnetic ground state was confirmed with a magnetic moment of 6 μB per unit cell.
An estimated Curie temperature of 161 K suggests robust ferromagnetism.

Conclusions:

Monolayer CrGeS3 is a promising 2D ferromagnetic semiconductor.
Its electronic and magnetic properties are suitable for nanoscale spintronic applications.