DC Field Science Highlights
Linear-In Temperature Resistivity From Isotropic Planckian Scattering Rate
Electrons in metals behave like chaotic bumper cars, crashing into each other at every opportunity. While they may be reckless drivers, this result demonstrates that this chaos has a limit established by the laws of quantum mechanics. Using the 45T hybrid magnet and a crystal of high-temperature superconducting material, scientists were able to measure this boundary using high fields to bend electron trajectories to their will.
First Spin Coherence Measurements in the MagLab's 32T Superconducting Magnet
The MagLab's 32 T all-superconducting magnet is now serving users at full field. An early experiment in the magnet identified an important milestone on the road to quantum computers.
Exchange Bias Between Coexisting Antiferromagnetic and Spin-Glass Orders
A pane of window glass and a piece of quartz are both are transparent to light, but their atomic structure is very different. Quartz is crystalline at the atomic level while window glass is amorphous. This can also occur with magnetism at the atomic level in solids containing magnetic states such as antiferromagnetism (ordered) and spin-glass (disorded). This work describes the interaction (exchange bias) between ordered and disordered magnetic states and how the magnetic properties of the material are altered as a result.
Broadening Participation in DC Field Facility by Bridging a Research Infrastructure Gap
Researchers based at four-year colleges and universities outside of the Research-1 (R1) tier face more obstacles to performing research than their colleagues from R1 universities or national laboratories with robust research infrastructures. Recognizing the need to bridge this infrastructure gap, the MagLab's DC Field Facility expanded access by adding two low-field magnet systems. These "on-ramp" systems facilitate critical access to materials research instrumentation by faculty and students from non-R1 institutions.
![(Left) 125Te spectral line and effective gamma with respect to magnetic field. Black circles are from the 36T Series Connected Hybrid while the pink diamonds are from the new HTS 32T magnet. (Right) Phase diagram for H//c highlighting the possible spin-nematic state. [PRB 94 064403 2016] Solid circles are from magnetostriction. Open circles from magnetostriction and thermal expansion. Open triangles from magnetization.](/media/k2/items/cache/c04d87aa8933a07fbb7fb4cbd401ad43_S.jpg)
Probing a Purported Spin Nematic State Utilizing the World Record 32T All-Superconducting Magnet
Nuclear magnetic resonance measurements were performed in the all-new 32 T superconducting magnet in an effort to confirm a new quantum state. Results confirm the game-changing nature of this magnet.
Spectroscopic Decomposition Reveals Mangetization Mechanism in Multiferrroic Lutetium Iron Oxide Superlattices
Using electric fields as a switch to control the magnetism of a material is one of the goals behind the study of multiferroics. This work explores the microscopic origins of high temperature magnetism in one such material through the use of optical techniques in high magnetic fields, an approach that could help researchers understand magnetism in a large class of materials.
Tunable Weyl Fermions in Chiral Tellurene in High Magnetic Fields
Topology, screws, spin and hedgehogs are words not normally found in the same scientific article but with the discovery of Weyl fermions in thin tellurine films they actually belong together. The work in this highlight describes how Qui et. al. used the unique properties of tellurine and high magnetic fields to identify the existence of Weyl fermions in a semiconductor. This discovery opens a new window into the intriguing world to topological materials.
Hidden Magnetism Revealed in a Cuprate Superconductor
This research clarifies fundamental relationships between magnetism, superconductivity and the nature of the enigmatic “pseudogap state" in cuprate superconductors. The discovery provides an additional puzzle piece in the theoretical understanding of high-temperature superconductors - a key towards improving and utilizing these materials for technological applications.
Inducing Magnetic Ring Currents in Non-Magnetic Aromatic Molecules
Magnetic induction is used in technology to convert an applied magnetic field into an electric current and vice versa. Nature also makes extensive use of this principle at the atomic and molecular level giving scientists a window to observe material properties. Using the 25 T Split-Helix magnet, researchers observed changes in the optical properties of organic materials due to currents induced by applied magnetic fields flowing in molecular rings, evidence that could increase the list of materials that could be used in future magnetic technologies.
Magnetoelectric coupling at a transition between two spin states
Materials with magnetoelectric coupling - a combination of magnetic and electric properties - have potential applications in low-power magnetic sensing, new computational devices and high-frequency electronics. Here, researchers find a new class of magnetoelectric materials controlled by spin state switching.
Exploring topological semimetals in high magnetic fields
Topological semimetals are an exciting new area of research due to their number of predicted and unexpected quantum mechanical states. Understanding these materials may also lead to quantum devices that function at near room temperature.
Nematic Phase Weakens Superconductivity
A nematic phase is where the molecular/atomic dynamics show elements of both liquids and solids, like in liquid crystal displays on digital watches or calculators. Using high magnetic fields and high pressure, researchers probed the electronic states of an iron-based superconductor and found that its nematic state weakened superconductivity.
Extreme re-entrant superconductivity
Studies of uranium ditelluride in high magnetic fields show superconductivity switching off at 35 T, but reoccurring at higher magnetic fields between 40 and 65 T.
Emergent states of matter in chemically doped quantum magnets
Research on doped SrCu2(BO3)2 shows anomalies in the magnetization.
Spin-lattice and electron–phonon coupling in 3d/5d hybrid Sr3NiIrO6
In Sr3NiIrO6 vibrations in the crystal lattice (phonons) play an important role in its intriguing magnetic properties that result in a very high coercive field of 55 T. Using a combination of pulsed and DC magnetic fields coupled with magnetization and far-infrared spectroscopy, researchers were able to conclusively link the phonons to the magnetic behavior.
Fifty Percent Boost for Niobium–tin
MagLab users have modified the critical current of Nb3SN, a material that was thought to be fully exploited, and boosted its performance by 50%.
Evidence Supporting BiPd as a Topological Superconductor
The observation of topological states coupled with superconductivity represents an opportunity for scientists to manipulate nontrivial superconducting states via the spin-orbit interaction. While superconductivity has been extensively studied since its discovery in 1910, the advent of topological materials gives scientists a new avenue to explore quantum matter. BiPd is being studied using "MagLab-sized fields" by scientists from LSU in an effort to determine if it is indeed a topological superconductor.
Even denominator fractional quantum Hall states in graphene
Scientists revealed previously unobserved and unexpected FQH states in monolayer graphene that raise new questions regarding the interaction between electrons in these states.
Quasi-2D to 3D Fermi surface topology change in Nd-doped CeCoIn5
Scientists found that the emergence of an exotic quantum mechanical phase in Ce1-xNdxCoIn5 is due to a shape change in the Fermi surface. This finding ran counter to theoretical arguments and has led investigators in new directions.
Dirac fermions detected via quantum oscillations
This work provides important insight into one of the parent materials of iron-based superconductors.
