scholarly journals Quantum anomalous Hall phase and half-metallic phase in ferromagnetic (111) bilayers of 4d and 5d transition metal perovskites

2017 ◽  
Vol 95 (13) ◽  
Author(s):  
Hirak Kumar Chandra ◽  
Guang-Yu Guo
Keyword(s):  
Transition Metal ◽  
Metallic Phase ◽  
Half Metallic

scholarly journals Free-radical gases on two-dimensional transition-metal disulfides (XS2, X = Mo/W): robust half-metallicity for efficient nitrogen oxide sensors

2018 ◽  
Vol 9 ◽  
pp. 1641-1646 ◽  
Author(s):  
Chunmei Zhang ◽  
Yalong Jiao ◽  
Fengxian Ma ◽  
Sri Kasi Matta ◽  
Steven Bottle ◽  
...  
Keyword(s):  
Free Radical ◽  
Transition Metal ◽  
Density Functional ◽  
Single Layer ◽  
Metal Sulfides ◽  
Half Metallicity ◽  
Functional Theory ◽  
Half Metallic ◽  
Gas Molecules ◽  
High Level

The detection of single gas molecules is a highly challenging work because it requires sensors with an ultra-high level of sensitivity. By using density functional theory, here we demonstrate that the adsorption of a paramagnetic unpaired free radical gas (NO) on a monolayer of XS2 (X = Mo, W) can trigger the transition from semiconductor to half metal. More precisely, the single-layer XS2 (X = Mo, W) with NO adsorbed on it would behave like a metal in one spin channel while acting as a semiconductor in the other spin orientation. The half-metallicity is robust and independent of the NO concentration. In contrast, no half-metallic feature can be observed after the adsorption of other free radical gases such as NO2. The unique change in electronic properties after the adsorption of NO on transition-metal sulfides highlights an effective strategy to distinguish NO from other gas species by experimentally measuring spin-resolved transmission. Our results also suggest XS2 (X = Mo, W) nanosheets can act as promising nanoscale NO sensors.

Two-dimensional stable transition metal carbides (MnC and NbC) with prediction and novel functionalizations

2018 ◽  
Vol 20 (39) ◽  
pp. 25437-25445 ◽  
Author(s):  
Bingwen Zhang ◽  
Yina Huang ◽  
Weicheng Bao ◽  
Baolin Wang ◽  
Qiangqiang Meng ◽  
...  
Keyword(s):  
Transition Metal ◽  
Hall Effect ◽  
Quantum Spin ◽  
Two Dimensional ◽  
Li Ion Battery ◽  
Metal Carbides ◽  
Half Metallic ◽  
Quantum Spin Hall Effect ◽  
Transition Metal Carbides ◽  
Li Ion

MnC and NbC monolayers are predicted to be stable and promising for Li-ion battery, by functionalization, they exhibit half-metallic property and quantum spin Hall effect, respectively.

The electromagnetic performance of transition metal-substituted monolayer black arsenic-phosphorus

2021 ◽  
Author(s):  
Changdong Zheng ◽  
Ke Jiang ◽  
Kailun Yao ◽  
Sicong Zhu ◽  
Kaiming Wu
Keyword(s):  
Transition Metal ◽  
Spin Effect ◽  
Two Dimensional ◽  
Half Metallic ◽  
Tunnel Magnetoresistance ◽  
Electromagnetic Performance

Two-dimensional black arsenic-phosphorus (bAsP) doped with Ni atoms exhibits half-metallic properties. The device based on doped bAsP shows a perfect spin effect, and its tunnel magnetoresistance is up to 4 × 105%.

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