An Integrated Quantum Material Testbed With Multi-Resolution Photoemission Spectroscopy

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:

Synthesis of high-quality MnBi2Te4 and MnBi4Te7 single crystals are extremely challenging due to the disorders caused by its non-stoichiometry compositions. The 2DCC has developed a protocol to grow MnBi2Te4 and MnBi4Te7 single crystals with good quality. The close collaboration between the user and the 2DCC synthesis enables this work.

Publication:

Chenhui Yan, Emanuel Green, Riku Fukumori, Nikola Protic, Seng Huat Lee, Sebastian Fernandez-Mulligan, Rahim Raja, Robin Erdakos, Zhiqiang Mao, and Shuolong Yang, Rev. Sci. Instrum. 92, 113907 (2021). DOI: 10.1063/5.0072979

This work was partially supported by the NSF under Grant No. 2019131. E.G. acknowledges support from the UChicago Dean’s Scholars program. R.F. acknowledges support from the UChicago Jeff Metcalf program. The MnBi4Te7 sample preparation was supported by the National Science Foundation through the Penn State 2D Crystal Consortium-Materials Innovation Platform (2DCC-MIP) under NSF Cooperative Agreement No. DMR-1539916. We would like to thank Jonathan Sobota, Patrick Kirchmann, Hadas Soifer, Alexandre Gauthier, Brendan Faeth, Kyle Shen, Darrell Schlom, and David Awschalom for helpful discussions.