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Cornell University
When it Comes to Seeing Atoms, Blurrier is Better
One way to see atoms is to focus a beam of high-energy electrons to a tiny spot smaller than an atom and scan it around. The clarity of the resulting image is a tradeoff between collecting sufficient electrons to get a good signal, but too many electrons and the sample will be damaged.
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Cornell University
Atomic-Scale Visualizations of Low-Temperature Phase Transitions
I. El Baggari, N. Sivadas, G.M. Stiehl, J. Waelder, D.C. Ralph, C.J. Fennie, L.F. Kourkoutis
Probing the structure of layered materials offers a gateway to better understand and potentially manipulate their electronic properties. While interactions within the individual layers are dominant, the proximity of neighboring layers significantly impacts the properties of such quasi-2D systems. Transition-metal dichalcogenides containing tellurium are especially noteworthy for their modulated structures and prominent interlayer contributions.
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Pennsylvania State University
Deterministic Quantum Emission in an Epitaxial Two-Dimensional Material
LANL CINT scientists and their collaborators at UConn, AFRL, Penn State, and U. Oregon have discovered a method to create spatially localized quantum emission sites in a wafer-scale transition metal dichalcogenide film, WSe2, synthesized at the 2DCC facility. The team’s objective was to determine the role of strain in creating localized quantum emission sites in order to learn how to control their properties through strain.
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Pennsylvania State University
Two-Dimensional Grain Boundaries By Design
Grain boundaries are borders that separate crystals of distinct orientations and are generally considered as inevitable by-products of crystalline regions nucleating at different locations during growth. The MIP team has predicted how grain boundaries in two-dimensional crystals can form within a single grain by introducing bumps onto the substrate – the “floor” on which a 2D crystal grows.
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Pennsylvania State University
Electronic changes in molybdenum dichalcogenides on gold surfaces
In this study, x-ray and ultraviolet photoelectron spectroscopy (XPS, UPS) were used to identify charge transfer processes and changes in the structural phase for MoS2, MoSe2 and MoTe2 monolayers on Au surfaces annealed up to 500oC.
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Cornell University
Superconducting Sr2RuO4 films
H. P. Nair, J. P. Ruf, N.J. Schreiber, L. Miao, M. L. Grandon, D. J. Baek, B. H. Goodge, J. P. C. Ruff, L. F. Kourkoutis, K. M. Shen, D. G. Schlom
In virtually all implementations of a quantum computer, one of the states is an excited state that must, of necessity, decay spontaneously into its ground state. A fascinating alternative form of quantum computing has been proposed: braiding pairs of ground-state non-abelian anyons in two dimensions.
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Cornell University
A Guinness World Record: The Highest Resolution Microscope, enabled by a new detector technology
Y. Jiang, Z. Chen, Y. Han, P. Deb, H. Gao, S. Xie, P. Purohit, M. W. Tate, J. Park, S. M. Gruner, V. Elser, D. A. Muller
The work was recognized as the highest resolution microscope (of any type) by Guinness World Records in July 2018.
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University of California, Santa Barbara
First BioPACIFIC MIP Summer School
First BioPACIFIC MIP Summer School took place virtually, August 2-5, 2021
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Pennsylvania State University
Atomically Thin Stripes in Monolayer Sheets
The chemical similarity of molybdenum & tungsten suggests they should randomly distribute in WxMo1-xS2, a material of great interest for next-generation elec-tronics. The 2DCC discovered that these atoms actually form thin chains, whose very different masses make properties like heat conduction anisotropic. Stripes form due to fluctuations in the availability of sulfur, the third element in WxMo1-xS2.
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Cornell University
World-Record High Pressure Floating Zone Crystal Growth
Tyrel M. McQueen, W. Adam Phelan
A new world record for highest pressure of a floating zone crystal growth, at 300 atmospheres, twice the previous record, was achieved by PARADIM staff in the United States in collaboration with our industry partner SciDre. This work was done at Johns Hopkins University by Tyrel M. McQueen and W. Adam Phelan.
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