Half-Metallic Ferromagnetism and Surface Functionalization-Induced Metal–Insulator Transition in Graphene-like Two-Dimensional Cr2C Crystals

2015 ◽  
Vol 7 (31) ◽  
pp. 17510-17515 ◽  
Author(s):  
Chen Si ◽  
Jian Zhou ◽  
Zhimei Sun
Keyword(s):  
Surface Functionalization ◽  
Insulator Transition ◽  
Two Dimensional ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Half Metallic ◽  
Metallic Ferromagnetism ◽  
Half Metallic Ferromagnetism

scholarly journals Strain Induced Metal–Insulator Transition of Magnetic SrRuO3 Single Layer in SrRuO3/SrTiO3 Superlattice

2018 ◽  
Vol 8 (11) ◽  
pp. 2151
Author(s):  
Angus Huang ◽  
Sheng-Hsiung Hung ◽  
Horng-Tay Jeng
Keyword(s):  
Density Functional ◽  
Single Layer ◽  
Insulator Transition ◽  
Ferromagnetic Phase ◽  
Strain Effect ◽  
Dimensional System ◽  
Two Dimensional ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Half Metallic

Ferromagnetic phase in a two-dimensional system plays an important role not only in applications but also in studies of phase transition theory. Among numerous ferromagnetic materials, Sr Ru O 3 is famous for its half-metallicity, itinerant ferromagnetism and non-Fermi liquid metalicity. Single layer Sr Ru O 3 in Sr Ru O 3 / Sr Ti O 3 (SRO/STO) superlattice has been predicted as a two-dimensional half-metallic ferromagnetic system based on density functional theory (DFT). However, experiments show that metal–insulator transition associated with ferro–antiferromagnetism (FM–AFM) transition occurs when the thickness of SRO is less than 4 u.c. Combining DFT calculations with Monte Carlo simulations, we demonstrate in this work that the bulk ferromagnetic metallicity can be realized in single layer SRO in SRO/STO superlattice by manipulating the strain effect to trigger the metal–insulator transition, achieving two-dimensional (2D) half-metallic SRO thin film beyond the experimental observation of AFM insulator.Our results pave a new route to fulfill the ultrathin spin-polarized-2D electron gas (SP-2DEG).

Crystal growth and metal-insulator transition in two-dimensional layered rare-earth palladates

2018 ◽  
Vol 2 (8) ◽  
Author(s):  
Yoshiko Nanao ◽  
Yoshiharu Krockenberger ◽  
Ai Ikeda ◽  
Yoshitaka Taniyasu ◽  
Michio Naito ◽  
...  
Keyword(s):  
Rare Earth ◽  
Crystal Growth ◽  
Insulator Transition ◽  
Two Dimensional ◽  
Metal Insulator Transition ◽  
Metal Insulator

Scaling of an anomalous metal-insulator transition in a two-dimensional system in silicon atB=0

1995 ◽  
Vol 51 (11) ◽  
pp. 7038-7045 ◽  
Author(s):  
S. V. Kravchenko ◽  
Whitney E. Mason ◽  
G. E. Bowker ◽  
J. E. Furneaux ◽  
V. M. Pudalov ◽  
...  
Keyword(s):  
Insulator Transition ◽  
Dimensional System ◽  
Two Dimensional ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Two Dimensional System

Half-metallic ferromagnetism prediction in MoS2-based two-dimensional superlattice from first-principles

2018 ◽  
Vol 32 (07) ◽  
pp. 1850098 ◽  
Author(s):  
Yan-Ni Wen ◽  
Peng-Fei Gao ◽  
Ming-Gang Xia ◽  
Sheng-Li Zhang
Keyword(s):  
Structural Stability ◽  
Density Functional ◽  
2D Materials ◽  
Two Dimensional ◽  
Spin Filter ◽  
Half Metallic ◽  
Hexagonal Ring ◽  
Electrical And Magnetic Properties ◽  
Metallic Ferromagnetism ◽  
Half Metallic Ferromagnetism

Half-metallic ferromagnetism (HMFM) has great potential application in spin filter. However, it is extremely rare, especially in two-dimensional (2D) materials. At present, 2D materials have drawn international interest in spintronic devices. Here, we use ab initio density functional theory (DFT) calculations to study the structural stability and electrical and magnetic properties of the MoS2-based 2D superlattice formed by inserting graphene hexagonal ring in [Formula: see text] MoS2 supercell. Two kinds of structures with hexagonal carbon ring were predicted with structural stability and were shown HMFM. The two structures combine the spin transport capacity of graphene with the magnetism of the defective 2D MoS2. And they have strong covalent bonding between the C and S or Mo atoms near the interface. This work is very useful to help us to design reasonable MoS2-based spin filter.

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