2021年4月1日 · Consistently ultrathin SnS was synthesized on SnS 2 van der Waals substrates. Real-time microscopy establishes underlying growth processes. Experiment and calculations identify thickness-dependent vibrational properties. First high-quality PFM maps of SnS ferroelectric polarization and domains.

2022年10月17日 · By combining density functional theory (DFT) calculations and electrical transport/piezoresponse force microscopy (PFM) measurements, the internal mechanism is clarified unambiguously. 2D SnSe...

2020年5月15日 · Here, we report an in-plane ferroelectric device of a micrometer-size monolayer SnS grown by physical vapor deposition (PVD), where the growth conditions are precisely controlled to balance the...

2023年10月13日 · The intrinsic piezoelectricity of 2D SnS layers directly grown on polyamides (PIs) was confirmed by piezoelectric force microscopy (PFM) phase maps and force–current corroborative measurements. Furthermore, the structural robustness of the centimeter-scale 2D SnS layers/PIs allowed for engraving complicated kirigami patterns on them.

2023年2月14日 · In this work, we report the low-pressure PVD synthesis of high-quality 2D SnSe crystals with thinner thickness and larger lateral sizes. The as-synthesized SnSe displays high crystallinity and phase purity, as confirmed by Raman, X-ray photoemission spectroscopy (XPS), and scanning transmission electron ( (micro-scopy)) (STEM).

通过结合 密度泛函理论 (DFT)计算和电输运/压电响应力显微镜(PFM)测量，明确了内部机制。有趣的是，在二维掺杂p的SnSe中，当居里温度接近~337 K时，已经证明了室温的铁磁性。

2023年5月6日 · In the end, the ferroelectric domains of SnS were inspected by PFM as well as optical method and the atomic model of ferroelectric domain boundary in SnS was proposed. The β′ phase SnS studied in this work can play an indispensable role in the future exploration of non-centrosymmetric properties in few-layer 2D materials. 4 Experimental Section

2023年5月13日 · The local SS-PFM was collected in dual AC resonance tracking (DART) mode by superimposing an AC signal on a series of DC triangular, sawtooth waveform voltages.

2020年8月18日 · Currently, piezoresponse force microscopy (PFM) is the most widely applied SPM method for the microscopic studies of 2D ferroelectrics. In PFM experiments, out-of-plane and in-plane polarization components are detected by measuring the deflection and torsion of a cantilever, as responses to the material deformation induced by the vertical ...

2024年7月2日 · In this study, sizable crystals of 2D ferroelectric SnS are successfully grown, facilitating a comprehensive yet intricate examination of domain configurations utilizing polarized optical microscopy and piezoresponse force microscopy.