2DCC User Research Higlight

What Has Been Achieved:

This paper reported a comprehensive study of magnetic proximity effect (MPE) in bilayers that interface a topological insulator (Bi2Se3) with an insulating ferromagnet {MgAl0.5Fe1.5O4), demonstrating the need for careful interpretation of polarized neutron reflectometry and anomalous effect data that are often used to show purported evidence of MPE.

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What Has Been Achieved:

Design and demonstration of an ultrafast optical modulator operating at near-IR and mid-IR based on a graphene metallic metasurface absorber (GMMA) structure.

Importance of the Achievement:

What Has Been Achieved:

This works demonstrates interlayer magnetophononic coupling in the layered magnetic topological insulator MnBi2Te4

Importance of the Achievement:

The results resulting from this work demonstrates a pathway toward achieving ultrafast light-induced topological phase transitions.

Unique Feature(s) of the MIP that Enabled this Achievement:

What Has Been Achieved:

The formations of charge and lattice orders are generally coupled in charge density wave (CDW) materials. However, this work reveals the presence of a surprising quasi-one-dimensional Fermi surface with nesting condition and find that the wave vectors of the fermi surface nesting and periodic lattice distortion are different, suggesting the decoupled formation between charge and lattice orders.

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What Has Been Achieved:

A process to produce wafer-scale single-layer amorphous MoO3 was developed by UV-ozone oxidation of a MoS2 monolayer. The ultrathin MoO3 was used an active device layer to demonstrate the thinnest oxide-based nonvolatile resistive switching device that exhibits low voltage operation and high ON/OFF ratio.

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What Has Been Achieved:

Demonstrate ultrafast optical melting of trimer superstructure in layered 1T′-TaTe2.

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What Has Been Achieved:

This work successfully fabricated nano-scale crossed junctions composed of two vdW nanowires: p-type Ta2Pt3Se8 (TPtS) and n-type Ta2Pd3Se8 (TPdS) and revealed its unique electronic and optoelectronic properties.

Importance of the Achievement:

This work not only reveals a route to build a nanoscale crossed junction between two quasi-1D vdW materials, but also shed light on the electrical transport and photocurrent generation mechanisms for the nanoscale crossed junctions.

What Has Been Achieved:
The experiment provides evidence for a topological Hall effect created by skyrmions and  the Dzyaloshinskii–Moriya interaction at the interface between a topological insulator (Bi2Se3) and an insulating ferromagnet (BaFe12O19).

Importance of the Achievement:
This study identified a model system wherein the topological Hall effect and skyrmions, phenomena of fundamental interest in condensed matter physics, can be systematically studied in an interfacial topological quantum material with no obvious artifacts. 

What Has Been Achieved:

Deconvoluting the impact of processing on remote epitaxy of 3D materials using graphene as the interface layer.

Importance of the Achievement:

This work provides the first understanding and impact of graphene layer transfer and 2D/3D interface properties on remote epitaxy.  It provides an important how-to guide for researchers interested in remote epitaxy regarding the importance of the graphene layer and how it is prepared.

Unique Feature(s) of the MIP that Enabled this Achievement:

What Has Been Achieved:

Succeeded in providing the origins of electronic bands in the antiferromagnetic topological insulator MnBi2Te4.

Importance of the Achievement:

Offer a solid step forward in reconciling the existing controversies in the electronic structure of MnBi2Te4 and provides an important framework to understand the electronic structures of other relevant topological materials MnBi2nTe3n+1.

Unique Feature(s) of the MIP that Enabled this Achievement: