These monthly highlights, selected by MagLab Director Greg Boebinger, represent the most promising and cutting-edge research underway in the lab’s seven user facilities.
The MagLab has successfully completed construction of the cold-mass of a series-connected hybrid magnet for the Helmholtz-Zentrum Berlin.
Scientists have developed a new way to test tape made of the promising high-temperature superconductor YBCO, a key step toward building stronger superconducting magnets.
Using the 35 T and 45T magnet systems, coupled with high pressures up to 1.47 GPa, researchers at the Magnet Lab have observed a massive, pressure induced change in the Fermi surface of elemental chromium. Part of this reorganization results in the creation of quantum interference oscillations at high pressures which behave differently from those arising from standard Landau quantization.
Solid state NMR measurements reveal an important structural distinction between different disease-relevant aggregates: oligomers and fibrils. While molecular confirmations are similar within both structures, oligomers differ from fibrils in terms of intermolecular organization of beta-strands.
Traditional tools for routine environmental analysis and forensic chemistry of petroleum have relied almost exclusively on gas chromatography-mass spectrometry (GC-MS), although many compounds in crude oil (and its transformation products) are not chromatographically separated or amenable to GC-MS due to volatility. We apply ultrahigh resolution Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry to identify compositional changes at the molecular level between native and weathered crude oil samples and reveal enrichment in polar compounds inaccessible by GC-based characterization.
Scientists of the NHMFL-PFF have employed Resonant Ultrasound Spectroscopy to reveal a thermodynamic signature of the “Pseudo-Gap” within and beyond the superconducting phase boundary of YBCO. This experiment provides thermodynamic evidence that the pseudo gap is connected to the superconducting ground state in the cuprate materials.
This study compared the effects of two Magnet Lab STEM informal education programs on students’ STEM identities (particularly as it relates to interest in STEM and perceptions of STEM professionals/careers). The results indicate that both camps significantly improved girls’ STEM identities.
MagLab scientists developed a method to process high-temperature superconducting Bi-2122 round wire that significantly boosts its ability to carry large electrical currents and generate high magnetic fields.
Researchers using pulsed field gradient NMR at the AMRIS facility found clear evidence for molecular single file diffusion of xenon gas confined inside model nanotube systems.
Using the 45T hybrid magnet, researchers uncover the quantum Hall effect in hydrogenated graphene.
Researchers find high critical current density in the recently discovered oxypnictide superconductor SmFeAs(O,F), raising hopes for potential electronics applications.
Research suggests that anisotropy in the high-symmetry coordination environment of Ni(II) complex is an order of magnitude larger than any previously known.
New research at the lab’s High B/T facility supports the proposal that the disordered ground state of terbium titanate is a quantum spin ice.
Using the lab’s 21 tesla magnet to image chlorine in the brain, researchers explore new ways to track tumor growth.
Using a novel combination of techniques, scientists researching the COPII protein created a pseudo-atomic model of the COPII cage, gaining a better understanding of how its 96 subunits fit together.
Using the 45 tesla hybrid magnet, researchers at the MagLab observed the long-predicted but never-before-seen fractal known as the Hofstadter butterfly. This work enriches our understanding of the basic physics of electrons in a magnetic field and opens a new route for exploring the role of topology in condensed matter systems.
Thanks to conditions created by the MagLab’s 45 tesla hybrid magnet, scientists have made a technological breakthrough on graphene: When they placed it on top of hexagonal boron nitride, graphene became a semiconductor.
Using optical spectroscopy and the MagLab’s unique 60 tesla long-pulse magnet in Los Alamos, scientists have shown how nitrogen dopant atoms in gallium arsenide (GaAs) can form extended “supercluster” states or can break up into localized nitrogen clusters. Nitrogen-doped GaAs (GaAs1-xNx) is a semiconductor alloy with potential applications for a wide range of energy-related applications such as photovoltaics.
Using a novel NMR approach, scientists characterize the metabolome of E. coli cells, determining 112 topologies of unique metabolites from a single sample.
Research on La2-xSrxCuO4 provides a new perspective on the mechanism for the superconductor-insulator transition in cuprates, one of the key questions in condensed matter physics.