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Displaying 11526 - 11550 of 73927

Mechanical Control of Crystal Symmetry and Superconductivity in Weyl Semimetal MoTe 2

July 30, 2018
Author(s)
Colin A Heikes, I Lin NMN Liu, Tristin Metz, Christoper Eckberg, Paul Michael Neves, Yan Wu, Linda NMN Hung, Phil Piccoli, Huibo Cao, Juscelino Leao, Johnpierre Paglione, Taner Yildirim, Nicholas P. Butch, William D. Ratcliff
The concept of topological order applied to condensed matter systems has inspired extensive experimental and theoretical searches for novel types of quantum matter. Topological superconductivity, where a bulk superconducting state and non-trivial topology

Towards superconductivity in p-type delta-doped Si/Al/Si heterostructures

July 30, 2018
Author(s)
Aruna N. Ramanayaka, Hyun Soo Kim, Joseph A. Hagmann, Roy E. Murray, Ke Tang, Neil M. Zimmerman, Curt A. Richter, Joshua M. Pomeroy, Frederick Meisenkothen, Huairuo Zhang, Albert Davydov, Leonid A. Bendersky
In pursuit of superconductivity in p-type silicon (Si), we are using a single atomic layer of aluminum (Al) sandwiched between a Si substrate and a thin Si epi-layer. The delta layer was fabricated starting from an ultra high vacuum (UHV) flash anneal of

Two-photon optical frequency reference with active AC Stark shift cancellation

July 30, 2018
Author(s)
Vladislav P. Gerginov, Kyle P. Beloy
An optical reference based on two-photon optical transition with AC stark shift cancellation is proposed. The reference uses two interrogating laser fields at different frequencies. Compared to conventional optical two-photon references, the new approach

Probability of Coexistence of LTE-LAA and WLAN Systems Based on Delay Constraints

July 29, 2018
Author(s)
Yao Ma, William Young, Eric W. Anderson, Jason Coder
To support efficient spectrum sharing and related standardization efforts in unlicensed spectrum, it is important to develop analytical tools to accurately quantify coexistence performance between long-term evolution license assisted access (LTE-LAA) and

Certification of Standard Reference Material 1879b Respirable Cristobalite

July 27, 2018
Author(s)
David R. Black, Marcus H. Mendenhall, Pamela S. Whitfield, Craig Brown, Albert Henins, James J. Filliben, James P. Cline
The National Institute of Standards and Technology (NIST) certifies a suite of Standard Reference Materials (SRMs) to address specific aspects of the performance of X-ray powder diffraction instruments. This report describes SRM 1879b, the third generation

Development of Airborne Nanoparticle Exposure Modeling Tools

July 27, 2018
Author(s)
William S. Dols, Andrew K. Persily, Brian J. Polidoro
Engineered nanoparticles (ENP) are being used in many applications including consumer products. There are many different means by which ENPs may be incorporated into these products (freely- dispersed, embedded, reactive or passive) which can impact the

Guidance for Evaluating Contactless Fingerprint Acquisition Devices

July 27, 2018
Author(s)
John M. Libert, John D. Grantham, Bruce Bandini, Stephen S. Wood, Michael D. Garris, Kenneth Ko, Frederick R. Byers, Craig I. Watson
This document details efforts undertaken by the National Institute of Standards and Technology (NIST) to develop measurements and a protocol for the evaluation of contactless (touchless) fingerprint acquisition devices. Contactless fingerprint capture

NIST Micronutrients Measurement Quality Assurance Program: Spring and Fall 1986 Comparability Studies Results for Round Robins VII and VIII Fat Soluble Vitamins and Carotenoids in Human Serum

July 27, 2018
Author(s)
Jeanice M. Brown Thomas, David L. Duewer, Margaret C. Kline, Neal Craft, Fillmer Ruegg, Emil Schonberger, Robert Schaffer, Robert Paule
From 1984 to 2017, the National Institute of Standards and Technology coordinated the Micronutrients Measurement Quality Assurance Program (MMQAP) for laboratories that measure fat soluble vitamins and carotenoids in human serum and plasma. This report

Roles and Responsibilities of NIST in the Development of Documentary Standards

July 27, 2018
Author(s)
Prem K. Rachakonda, Balasubramanian Muralikrishnan, Daniel S. Sawyer
The National Institute of Standards and Technology (NIST) is a non-regulatory federal agency of the Department of Commerce and is the national metrology institute of the US. The background of NIST's role in the development of voluntary consensus standards

Securing Electronic Health Records on Mobile Devices

July 27, 2018
Author(s)
Gavin W. O'Brien, Nate V. Lesser, Brett Pleasant, Sue Wang, Kangmin Zheng, Colin Bowers, Kyle Kamke
Health care providers increasingly use mobile devices to receive, store, process, and transmit patient clinical information. According to our own risk analysis, discussed here, and in the experience of many health care providers, mobile devices can present

Verification of a Many-Ion Simulator of the Dicke Model Through Slow Quenches across a Phase Transition

July 27, 2018
Author(s)
Arghavan Safavi-Naini, R. J. Lewis-Swan, Justin G. Bohnet, M. Garttner, Kevin Gilmore, Elena Jordan, J. Cohn, James K. Freericks, Ana Maria Rey, John Bollinger
We use a self-assembled two-dimensional Coulomb crystal of ∼70 ions in the presence of an external transverse field to engineer a simulator of the Dicke Hamiltonian, an iconic model in quantum optics which features a quantum phase transition between a

A reference high-pressure CO2 adsorption isotherm for ammonium ZSM-5 zeolite: results of an interlaboratory study

July 26, 2018
Author(s)
Huong Giang T. Nguyen, Laura Espinal, Roger D. van Zee, Matthias Thommes, Blaza Toman, Sterlin Hudson, Enzo Mangano, Stefano Brandani, Katie Cychosz, Pieter Bertier, Feng Yang, Bernhard Krooss, Rebecca Siegelman, Jeffrey Long, Yoko Nakada, Kazu Nakai, Armin Ebner, James Ritter, Aaron Moran, Orhan Talu, Yi Huang, Krista Walton, Pierre Billemont, Guy de Weireld
This paper reports the results of an international interlaboratory study led by the National Institute of Standards and Technology (NIST) on the measurement of high-pressure surface excess carbon dioxide adsorption isotherms on NIST Reference Material RM
Displaying 11526 - 11550 of 73927
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