2009/06/04 by Takashi Hotta
Materials Science · Physics and Astronomy · #Organic and Molecular Conductors Research #Quantum and electron transport phenomena #Rare-earth and actinide compounds #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1143/jpsj.78.073707
published as J. Phys. Soc. Jpn. 78, 073707 (2009). · 4 pages, 3 figures. To appear in J. Phys. Soc. Jpn
arxiv created 2009/06/04 · openalex publication_date 2009/07/10 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
In an electron system coupled with anharmonic phonons, i.e., \it rattling, inverse isotope effect on the Kondo temperature T\rm K is found to occur by the numerical evaluation of the Sommerfeld constant γ of the Anderson-Holstein model. For the anharmonic potential of an oscillator with mass M in which large γ has been found to be almost independent of an applied magnetic field, γ is significantly suppressed when M is increased, i.e., T\rm K is enhanced due to the relation of γ\simT\rm K-1 in the Kondo problem, leading to the inverse isotope effect on T\rm K. Since this phenomenon does not occur for harmonic phonons, it can be a key experiment to prove the relevance of rattling to magnetically robust heavy electron state.