回首頁 到查詢結果 [ subject:"Rare earth metals." ]

Thermal transport in strongly correl...
Pfau, Heike.

 

  • Thermal transport in strongly correlated rare-earth intermetallic compounds[electronic resource] /
  • 紀錄類型: 書目-電子資源 : Monograph/item
    杜威分類號: 620.1696
    書名/作者: Thermal transport in strongly correlated rare-earth intermetallic compounds/ by Heike Pfau.
    作者: Pfau, Heike.
    出版者: Cham : : Springer International Publishing :, 2016.
    面頁冊數: xxi, 118 p. : : ill. (some col.), digital ;; 24 cm.
    Contained By: Springer eBooks
    標題: Intermetallic compounds - Thermal properties.
    標題: Rare earth metals.
    標題: Heat - Transmission.
    標題: Physics.
    標題: Strongly Correlated Systems, Superconductivity.
    標題: Metallic Materials.
    ISBN: 9783319395432
    ISBN: 9783319395425
    內容註: Introduction -- Theoretical Models -- Experimental Techniques for Transport Measurements -- The Wiedemann-Franz Law in YbRh2Si2 -- Kondo Lattices in Magnetic Field -- The Superconducting Order Parameter of LaPt4Ge12 -- Summary and Outlook.
    摘要、提要註: This thesis explores thermal transport in selected rare-earth-based intermetallic compounds to answer questions of great current interest. It also sheds light on the interplay of Kondo physics and Fermi surface changes. By performing thermal conductivity and electrical resistivity measurements at temperatures as low as 25mK, the author demonstrates that the Wiedemann-Franz law, a cornerstone of metal physics, is violated at precisely the magnetic-field-induced quantum critical point of the heavy-fermion metal YbRh2Si2. This first-ever observation of a violation has dramatic consequences, as it implies a breakdown of the quasiparticle picture. Utilizing an innovative technique to measure low-temperature thermal transport isothermally as a function of the magnetic field, the thesis interprets specific, partly newly discovered, high-field transitions in CeRu2Si2 and YbRh2Si2 as Lifshitz transitions related to a change in the Fermi surface. Lastly, by applying this new technique to thermal conductivity measurements of the skutterudite superconductor LaPt4Ge12, the thesis proves that the system is a conventional superconductor with a single energy gap. Thus, it refutes the widespread speculations about unconventional Cooper pairing in this material.
    電子資源: http://dx.doi.org/10.1007/978-3-319-39543-2
評論
Export
取書館別
 
 
變更密碼
登入