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Displaying 851 - 875 of 4276

Modifying Critical Exponents of Magnetic Phase Transitions via Nanoscale Materials Design

September 28, 2021
Author(s)
Lorenzo Fallarino, Eva Lopez Rojo, Mikel Quintana, Juan Sebastian Salcedo Gallo, Brian Kirby, Andreas Berger
We demonstrate a nanoscale materials design path that allows us to bypass universality in thin ferromagnetic films and enables us to tune the critical exponents of ferromagnetic phase transitions in a very wide parameter range, while at the same time

STEM-in-SEM: A Re-Emerging Material Measurement Approach

September 21, 2021
Author(s)
Bob R. Keller
Analytical STEM-in-SEM has undergone a striking resurgence in terms of both methodology development and applications over the past 10 to 15 years, driven in part by the significant technological potential promised by low-dimensional structures such as

Elucidating Proximity Magnetism through Polarized Neutron Reflectometry and Machine Learning

September 16, 2021
Author(s)
Nina Andrejevic, Zhantao Chen, Thanh Nguyen, Leon Fan, Henry Heiberger, Valeria Lauter, Ling-Jie Zhou, Yi-Fan Zhao, Cui-Zu Chang, Alexander Grutter, Mingda Li
Polarized neutron reflectometry (PNR) is a powerful technique to interrogate the structures of multilayered magnetic materials with depth sensitivity and nanometer resolution. However, reflectometry profiles often inhabit a complicated objective function

Alternatives to aluminum gates for silicon quantum devices: Defects and strain

September 15, 2021
Author(s)
Ryan Stein, Zachary Barcikowski, Sujitra Pookpanratana, Joshua M. Pomeroy, Michael Stewart
Gate-defined quantum dots (QD) benefit from the use of small grain size metals for gates materials because it aids in shrinking the device dimensions. However, it is not clear what differences arise with respect to process-induced defect densities and

Single-photon detection in the mid-infrared up to 10 micron wavelength using tungsten silicide superconducting nanowire detectors

September 14, 2021
Author(s)
Varun Verma, Adriana Lita, Yao Zhai, Heli C. Vora, Richard Mirin, Sae Woo Nam, Boris Korzh, Alex Walter, Ryan Briggs, Marco Colangelo, Emma Wollman, Andrew Beyer, Jason Allmaras, D. Zhu, Ekkehart Schmidt, A. G. Kozorezov, Matthew Shaw
We developed superconducting nanowire single-photon detectors (SNSPDs) based on tungsten silicide (WSi) that show saturated internal detection efficiency up to a wavelength of 10 um. These detectors are promising for applications in the mid-infrared

Intramolecular Structure and Dynamics in Computationally Designed Peptide-Based Polymers Displaying Tunable Chain Stiffness

September 7, 2021
Author(s)
Nairiti Sinha, Yi Shi, Christopher J. Kloxin, Jeffery G. Saven, Antonio Faraone, Grethe V. Jensen, Darrin J. Pochan
Polymers constructed via hybrid physical-covalent assembly of computationally designed peptide coiled coils, or bundlemers, display tunable chain stiffness via control of inter-bundlemer connectivity. Neutron spin echo spectroscopy reveals that rigid rod

Developing Ideal Metalorganic Hydrides for Hydrogen Storage: From Theoretical Prediction to Rational Fabrication

September 6, 2021
Author(s)
Zijun Jing, Qinqin Yuan, Yang Yu, Xiangtao Kong, Khai C. Tan, Jintao Wang, Qijun Pei, Xue-Bin Wang, Wei Zhou, Hui Wu, Anan Wu, Teng He, Ping Chen
Materials for hydrogen storage have been extensively explored for a few decades. Thousands of hydrogen storage materials have been synthesized and tested, however, sparse systems could meet the practical requirements. Metalorganic hydrides discovered
Displaying 851 - 875 of 4276
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