Quantified degeneracy, entropy, and metal-insulator transition in complex transition-metal oxides

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 84
  • Download : 0
Understanding complex correlated oxides and their phase transitions has long been a challenge. The difficulty largely arises from the intriguing interplay between multiple degrees of freedoms. While degeneracy can play an important role in determining material characteristics, there is no well-defined way to quantify and to unveil its role in real materials having complicated band structures. Here we suggest a way to quantify the "effective degeneracy" relevant to metal-insulator transition by introducing entropylike terms. This new quantity well describes the electronic behaviors of transition-metal oxides as a function of external and internal parameters. With 3d titanates, 4d ruthenates, and 5d iridates as our examples, we show that this new effective quantity provides useful insights to understand these systems and their phase transitions. For LaTiO3/LaAlO3 superlattice, we suggest a novel "degeneracy control" metal-insulator transition.
Publisher
AMER PHYSICAL SOC
Issue Date
2018-10
Language
English
Article Type
Article
Citation

PHYSICAL REVIEW B, v.98, no.16, pp.165114

ISSN
2469-9950
DOI
10.1103/PhysRevB.98.165114
URI
http://hdl.handle.net/10203/246315
Appears in Collection
PH-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0