BROWSE

Related Researcher

Author's Photo

Jin, Hosub
Quantum Materials Design Lab
Research Interests
  • Spin-orbit coupling, electron-correlation, topological quantum phases

ITEM VIEW & DOWNLOAD

Phonon-assisted optical excitation in the narrow bandgap Mott insulator Sr3Ir2O7

Cited 4 times inthomson ciCited 4 times inthomson ci
Title
Phonon-assisted optical excitation in the narrow bandgap Mott insulator Sr3Ir2O7
Author
Park, HJSohn, Chang HeeJeong, DWCao, GKim, KWMoon, SJJin, HosubCho, Deok-YongNoh, TW
Issue Date
2014-04
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW B, v.89, pp.155115
Abstract
We examined the temperature (T) evolution of the optical conductivity spectra of Sr3Ir2O7 over a wide range of 10-400 K. The system was barely insulating, exhibiting a small indirect bandgap of <= 0.1 eV. The low-energy features of the optical d-d excitation (h omega < 0.3 eV) evolved drastically, whereas such evolution was not observed for the O K-edge x-ray-absorption spectra. This suggests that the T evolution in optical spectra is not caused by a change in the bare (undressed) electronic structure, but instead presumably originates from an abundance of phonon-assisted indirect excitations. Our results showed that the low-energy excitations were dominated by phonon-absorption processeswhich involved, in particular, the optical phonons. This implies that phonon-assisted processes significantly facilitate the charge dynamics in barely insulating Sr3Ir2O7.
URI
https://scholarworks.unist.ac.kr/handle/201301/16806
URL
http://journals.aps.org/prb/abstract/10.1103/PhysRevB.89.155115
DOI
10.1103/PhysRevB.89.155115
ISSN
2469-9950
Appears in Collections:
PHY_Journal Papers
Files in This Item:
There are no files associated with this item.

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU