BROWSE

Related Scientist

Researcher

강상관계 물질 연구단
강상관계 물질 연구단
more info

Electrodynamic properties of the semimetallic Dirac material SrMnBi2: Two-carrier-model analysis

Cited 0 time in webofscience Cited 0 time in scopus
153 Viewed 71 Downloaded
Title
Electrodynamic properties of the semimetallic Dirac material SrMnBi2: Two-carrier-model analysis
Author(s)
H. J. Park; Byung Cheol Park; Min-Cheol Lee; Dawoon Jeong; Joonbum Park; Jun Sung Kim; Hyo Seok Ji; J. H. Shim; K. W. Kim; S. J. Moon; Hyeong-Do Kim; Deok-Yong Cho; T. W. Noh
Publication Date
2017-10
Journal
PHYSICAL REVIEW B, v.96, no.15, pp.155139 -
Publisher
AMER PHYSICAL SOC
Abstract
The electrodynamics of free carriers in the semimetallic Dirac material SrMnB i 2 was investigated using optical spectroscopy and first-principles calculations. Using a two-carrier-model analysis, the total free-carrier response was successfully decomposed into individual contributions from Dirac fermions and non-Dirac free carriers. Possible roles of chiral pseudospin, spin-orbit interaction (SOI), antiferromagnetism, and electron-phonon (e−ph)coupling in the Dirac fermion transport were also addressed. The Dirac fermions possess a low scattering rate of ∼10meV at low temperature and thereby experience coherent transport. However, at high temperatures, we observed that the Dirac fermion transport becomes significantly incoherent, possibly due to strong e−ph interactions. The SOI-induced gap and antiferromagnetism play minor roles in the electrodynamics of the free carriers in SrMnB i2. We also observed a seemingly optical-gap-like feature near 120 meV, which emerges at low temperatures but becomes filled in with increasing temperature. This gap-filling phenomenon is ascribed to phonon-assisted indirect transitions promoted at high temperatures. © 2017 American Physical Society
URI
http://pr.ibs.re.kr/handle/8788114/4160
ISSN
2469-9950
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > Journal Papers (저널논문)
Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
Files in This Item:
14_PhysRevB.96.155139.pdfDownload

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

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

Browse