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Evidence for persistent spin fluctuations in uranium sesquicarbide

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F13%3A00399801" target="_blank" >RIV/68378271:_____/13:00399801 - isvavai.cz</a>

  • Result on the web

    <a href="http://dx.doi.org/10.1103/PhysRevB.87.214414" target="_blank" >http://dx.doi.org/10.1103/PhysRevB.87.214414</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1103/PhysRevB.87.214414" target="_blank" >10.1103/PhysRevB.87.214414</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Evidence for persistent spin fluctuations in uranium sesquicarbide

  • Original language description

    The low-temperature magnetic susceptibility, heat capacity, and electrical resistivity of uranium sesquicarbide have been determined down to 2 K by combining measurements carried out on samples of U2C3, containing UC as minority phase, and on pure UC specimens. The presence of spin fluctuations with characteristic temperature TSF = 7 K is revealed by a nonanalytic contribution to the specific heat behaving (well below TSF) as T3ln(T/TSF), and confirmed by a T2 increase of the electrical resistivity anda 1?T2 decrease of the low-temperature magnetic susceptibility. The zero-temperature many-body enhancement of the electron mass is found to be m*/m 2.7. Our data rule out the occurrence of magnetic ordering in U2C3. First-principles electronic structurecalculations support the absence of a magnetically ordered ground state but suggest that dynamical spin fluctuations are responsible for the electron mass enhancement.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    BM - Solid-state physics and magnetism

  • OECD FORD branch

Result continuities

  • Project

    <a href="/en/project/GAP204%2F10%2F0330" target="_blank" >GAP204/10/0330: Nanostructured actinide-based materials: Theory and experiment</a><br>

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2013

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Physical Review. B

  • ISSN

    1098-0121

  • e-ISSN

  • Volume of the periodical

    87

  • Issue of the periodical within the volume

    21

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    9

  • Pages from-to

    "214414-1"-"214414-9"

  • UT code for WoS article

    000320307700002

  • EID of the result in the Scopus database