Fabrication of two-dimensional Kondo lattice by heavy fermion/insulator artificial superlattice

2015 Fiscal Year Final Research Report

• Project/Area Number: 24684027
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Condensed matter physics II
• Research Institution: Osaka Prefecture University
• Principal Investigator: Shishido Hiroaki 大阪府立大学, 工学(系)研究科(研究院), 助教 (80549585)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Keywords: 強相関電子系 / 重い電子系 / 多極子秩序 / トポロジカル絶縁体 / 薄膜作製

Outline of Final Research Achievements

We grow thin films of ReB6(Re: Ce and Sm) by molecular beam epitaxy under ultra-high vacuum. c-axis oriented thin films of a heavy fermion compound CeB6 were grown. Kondo like temperature dependence of the resistivity and antiferro-quadrupolar ordering are observed in CeB6 thin films.
We obtained partial epitaxial growth SmB6 thin films. The electrical resistivity in SmB6 thin films increases with decreasing temperature as a semiconductor, and becomes constant at low temperatures. These features well reproduce the tendency observed for the resistivity of bulk samples.
We also successfully grew artificial superlattices of SmB6/SrB6.

Free Research Field

固体物理