2DCC User Research Highlight

What Has Been Achieved:

Controlled introduction of single and divacancy defects in monolayer MoS2 using a Helium Ion Microscope. This enabled a detailed study correlating defect density with the carrier concentration and optical properties of MoS2. Reduced photoluminescence intensity in defected MoS2 was restored and dramatically enhanced due to adsorption of p-type dopants (FATCNQ) on the MoS2 surface.

Importance of the Achievement:

What Has Been Achieved:

A MRPES platform that integrates helium lamp ARPES, static laser ARPES, trARPES, μARPES, MBE, and μMBE into one system.

Importance of the Achievement:

MRPES is not merely a combination of different ARPES modules, but also simultaneous probing into energy, momentum, space, and time, with uncompromised resolutions in each domain. This setup allows researchers to fully reveal the complex physics in novel quantum materials.

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

What Has Been Achieved:

What Has Been Achieved:

We presented an elegant method that can be used to quantify atomic vacancies with sulfur terminations in 1L MoS2 created by helium ion irradiation. It is important to note that low mass of helium ion allows us to study gentle changes in crystallographic structure compared other data in literature using significantly heavier ions.

Importance of Achievement:

What Has Been Achieved:

What Has Been Achieved:

What Has Been Achieved:

What Has Been Achieved:

Through zero-field and magneto-infrared spectroscopy studies on single crystals of topological semimetal ZrSiSe, hallmarks of prominent electronic correlations in the nondal-line semimetal state have been revealed, i.e. strong reduction of the free carrier Drude weight and also the Fermi velocity compared to predictions of density functional band theory

Importance of Achievement:

What Has Been Achieved:

The experiment demonstrates the modification of the magnetic properties of a ferrimagnetic insulator, YIG, by juxtaposition with topological surface states in Bi2Se3 .

Importance of the Achievement:

This is the first example of how topological surface states in one material can influence the magnetic properties of another material.

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

What Has Been Achieved:

In this study, we have demonstrated that weak periodic LED signals, which are otherwise undetectable, can be detected by a MoS2 photodetector in the presence of a finite and optimum amount of white Gaussian noise at a frugal energy expenditure.

Importance of the Achievement: