Topics

Preferred Magnetic Excitations in the Iron-Based Sr_{1-x}Na_{x}Fe_{2}As_{2} Superconductor.

07:00 EST 11th January 2019 | BioPortfolio

Summary of "Preferred Magnetic Excitations in the Iron-Based Sr_{1-x}Na_{x}Fe_{2}As_{2} Superconductor."

With spin-orbit coupling, both local-moment magnetism and itinerant electrons are expected to behave anisotropically in spin space, but such effects' influence on the formation of unconventional superconductivity has been hitherto unexplored. Here, in an iron-based superconductor, Sr_{1-x}Na_{x}Fe_{2}As_{2}, we report spectroscopic evidence that itinerant electrons "prefer" to be assisted by c-axis polarized magnetic excitations in their formation of superconducting Cooper pairs, against the polarization of the local-moment excitations. Our result naturally explains why the superconductivity competes strongly with the tetragonal magnetic phase in this material, and provides a fresh view on how to make a good superconductor out of a magnetic "Hund's metal."

Affiliation

Journal Details

This article was published in the following journal.

Name: Physical review letters
ISSN: 1079-7114
Pages: 017001

Links

DeepDyve research library

PubMed Articles [18493 Associated PubMed Articles listed on BioPortfolio]

Bulk Superconductivity and Role of Fluctuations in the Iron-Based Superconductor FeSe at High Pressures.

The iron-based superconductor FeSe offers a unique possibility to study the interplay of superconductivity with purely nematic as well magnetic-nematic order by pressure (p) tuning. By measuring speci...

Wave Vector Difference of Magnetic Bragg Reflections and Low Energy Magnetic Excitations in Charge-stripe Ordered LaNiO.

We report on the magnetism of charge-stripe ordered LaNiO by neutron scattering and μSR. On going towards zero energy transfer there is an observed wave vector offset in the centring of the magnetic ...

A hybrid (iron-fat-water) phantom for liver iron overload quantification in the presence of contaminating fat using magnetic resonance imaging.

Assessment of iron content in the liver is crucial for diagnosis/treatment of iron-overload diseases. Nonetheless, T*-based methods become challenging when fat and iron are simultaneously present. Thi...

Localized Magnetic Excitations in the Fully Frustrated Dimerized Magnet Ba_{2}CoSi_{2}O_{6}Cl_{2}.

Magnetic excitations of the effective spin S=1/2 dimerized magnet Ba_{2}CoSi_{2}O_{6}Cl_{2} have been probed directly via inelastic neutron scattering experiments at temperatures down to 4 K. We obse...

Novel Magnetic Block States in Low-Dimensional Iron-Based Superconductors.

Inelastic neutron scattering recently confirmed the theoretical prediction of a ↑↑↓↓-magnetic state along the legs of quasi-one-dimensional iron-based ladders in the orbital-selective Mott pha...

Clinical Trials [6965 Associated Clinical Trials listed on BioPortfolio]

Determination of a Dose-dependent Effect of GOS on Iron Absorption, and Addition of Vitamin C

Iron deficiency is still the most common and widespread nutritional disorder in the world according to WHO. In a recent iron absorption study in adult women with low iron stores in our la...

Quantification of Liver Iron Overload and Steatosis Using Magnetic Resonance Imaging

Iron excess is increasingly regarded as an important cofactor in the morbidity attributed to many disorders. Assessment of body iron stores by measurement of serum ferritin concentrations ...

Quantitative Susceptibility Mapping (QSM) to Guide Iron Chelating Therapy

The overall goal of this research is to help develop a new magnetic resonance (MR) method, Quantitative Susceptibility Mapping (QSM), to improve the measurement of liver iron concentration...

Iron Deficiency in Female State Fair Attendees

This study aims to examine iron deficiency symptoms and biochemical iron status based on hemoglobin, hematocrit, ferritin, and total iron binding capacity in menstruating females.

Magnetic Resonance Imaging (MRI) Assessments of the Heart and Liver Iron Load in Patients With Transfusion Induced Iron Overload

This study will evaluate the change in cardiac iron load over a 53 week period measured by MRI in 3 cohorts of patients

Medical and Biotech [MESH] Definitions

Iron or iron compounds used in foods or as food. Dietary iron is important in oxygen transport and the synthesis of the iron-porphyrin proteins hemoglobin, myoglobin, cytochromes, and cytochrome oxidase. Insufficient amounts of dietary iron can lead to iron-deficiency anemia.

A multifunctional iron-sulfur protein that is both an iron regulatory protein and cytoplasmic form of aconitate hydratase. It binds to iron regulatory elements found on mRNAs involved in iron metabolism and regulates their translation. Its rate of degradation is increased in the presence of IRON.

A multifunctional iron-sulfur protein that is both an iron regulatory protein and cytoplasmic form of aconitate hydratase. It binds to iron regulatory elements found on mRNAs involved in iron metabolism and regulates their translation. Its RNA binding ability and its aconitate hydrolase activity are dependent upon availability of IRON.

Anemia characterized by decreased or absent iron stores, low serum iron concentration, low transferrin saturation, and low hemoglobin concentration or hematocrit value. The erythrocytes are hypochromic and microcytic and the iron binding capacity is increased.

An excessive accumulation of iron in the body due to a greater than normal absorption of iron from the gastrointestinal tract or from parenteral injection. This may arise from idiopathic hemochromatosis, excessive iron intake, chronic alcoholism, certain types of refractory anemia, or transfusional hemosiderosis. (From Churchill's Illustrated Medical Dictionary, 1989)

Quick Search


DeepDyve research library

Searches Linking to this Article