2018年6月29日 · Optical second harmonic generations (SHGs) from atomically thin MoTe 2 flakes with 2H and 1T′ phases are studied. From 2H-MoTe 2 samples with odd (even) numbers of layers, strong (negligible) SHGs are observed due to …

2016年10月5日 · We study the crystal symmetry of few-layer 1T′ MoTe 2 using the polarization dependence of the second harmonic generation (SHG) and Raman scattering. Bulk 1T′ MoTe 2 is known to be inversion symmetric; however, we find that the inversion symmetry is broken for finite crystals with even numbers of layers, resulting in strong SHG comparable ...

2022年9月17日 · The as-grown bilayer crystal exhibits a strong SHG intensity because it belongs to the acentric Pm space group, whereas monolayer and trilayer 1T′ MoTe 2 belongs to the P2 1 /m symmetric ...

2017年10月11日 · Here we report the experimental demonstration of an electrostatic-doping-driven phase transition between the hexagonal and monoclinic phases of monolayer molybdenum ditelluride (MoTe 2). We find...

2024年10月9日 · Here, we introduce a reliable strategy for manipulating the symmetry of low-dimensional materials through a programmable ferroelectric-doping patterns technique. This method introduces a...

The layered transition-metal dichalcogenide MoTe2, which can crystallize into several different structures with distinct topological and electronic properties, provides possibilities to control or switch between different phases.

2022年1月24日 · Here, we show that a monolayer ReS 2, which does not have a broken inversion symmetry due to its stable 1T′-distorted phase and correspondingly shows only weak second-harmonic generation (SHG), can produce a significantly enhanced (∼2 orders of magnitude) SHG upon reversible laser patterning.

Hexagonal molybdenum ditelluride (H-MoTe 2 ) is a semiconductor that exhibits a transition from an indirect to a direct band gap in bulk (0.88 eV) and single-layer (1.10...

2018年5月24日 · We have studied on optical second harmonic generations (SHGs) from atomically thin MoTe2 flakes with 2H and 1T' phases. From 2H-MoTe2 samples with odd (even) numbers of layers, strong (negligible) SHGs are observed due to the layer-dependent broken inversion symmetry.

We study the crystal symmetry of few-layer 1T′ MoTe2 using the polarization dependence of the second harmonic generation (SHG) and Raman scattering. Bulk 1T′ MoTe2 is known to be inversion symmetric; however, we find that the inversion symmetry is ...