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Author:

Han, Gang (Han, Gang.) | Liu, Furong (Liu, Furong.) (Scholars:刘富荣) | Zhang, Yongzhi (Zhang, Yongzhi.) | Li, Jingwen (Li, Jingwen.) (Scholars:李京文) | Li, Wenqiang (Li, Wenqiang.) | Chen, Qingyuan (Chen, Qingyuan.) | Li, Yu (Li, Yu.) | Xie, Xuanxuan (Xie, Xuanxuan.)

Indexed by:

EI Scopus SCIE

Abstract:

Heterostructural materials have the advantage of extreme low switching energy between states and hence are expected to be applied in photonic devices, whose optical performances are vital to explore in advance. In this paper, crystal structures of TiTe2/Sb2Te3 heterostructural films and their effects on optical properties were clarified from the aspects of in-plane strain, resonant bonding and charge redistribution by experiments and first principle simulations. Larger strain in Sb2Te3 sublayer tended to decrease reflectivity and refractive indexes, while huge resonant bonding effect was beneficial to improve the optical parameter deviations. Charge analyses showed that crystalline optical property variations were actually deriving from the electron redistribution differences especially near the heterostructural Te center dot center dot center dot Te gap, which also accounted for experimental reflectivity order. Finally, based on the resonant bond effects and surrounding electron density after stimuluses, five optical levels with identifiable optical contrasts (n and Delta R) were achieved in 1/2 model for uses. The present study sheds new light on optical properties of TiTe2/Sb2Te3 and paves the way for potential multi-state applications of heterostructure in photonic and storage devices. (C) 2021 Elsevier B.V. All rights reserved.

Keyword:

First principle simulation Optical properties Heterostructure Charge distribution

Author Community:

  • [ 1 ] [Han, Gang]Beijing Univ Technol, Minist Educ, Key Lab Trans Scale Laser Mfg, Beijing 100124, Peoples R China
  • [ 2 ] [Liu, Furong]Beijing Univ Technol, Minist Educ, Key Lab Trans Scale Laser Mfg, Beijing 100124, Peoples R China
  • [ 3 ] [Zhang, Yongzhi]Beijing Univ Technol, Minist Educ, Key Lab Trans Scale Laser Mfg, Beijing 100124, Peoples R China
  • [ 4 ] [Li, Wenqiang]Beijing Univ Technol, Minist Educ, Key Lab Trans Scale Laser Mfg, Beijing 100124, Peoples R China
  • [ 5 ] [Chen, Qingyuan]Beijing Univ Technol, Minist Educ, Key Lab Trans Scale Laser Mfg, Beijing 100124, Peoples R China
  • [ 6 ] [Li, Yu]Beijing Univ Technol, Minist Educ, Key Lab Trans Scale Laser Mfg, Beijing 100124, Peoples R China
  • [ 7 ] [Xie, Xuanxuan]Beijing Univ Technol, Minist Educ, Key Lab Trans Scale Laser Mfg, Beijing 100124, Peoples R China
  • [ 8 ] [Han, Gang]Beijing Univ Technol, Beijing Engn Res Ctr Laser Technol, Beijing 100124, Peoples R China
  • [ 9 ] [Liu, Furong]Beijing Univ Technol, Beijing Engn Res Ctr Laser Technol, Beijing 100124, Peoples R China
  • [ 10 ] [Zhang, Yongzhi]Beijing Univ Technol, Beijing Engn Res Ctr Laser Technol, Beijing 100124, Peoples R China
  • [ 11 ] [Li, Wenqiang]Beijing Univ Technol, Beijing Engn Res Ctr Laser Technol, Beijing 100124, Peoples R China
  • [ 12 ] [Chen, Qingyuan]Beijing Univ Technol, Beijing Engn Res Ctr Laser Technol, Beijing 100124, Peoples R China
  • [ 13 ] [Li, Yu]Beijing Univ Technol, Beijing Engn Res Ctr Laser Technol, Beijing 100124, Peoples R China
  • [ 14 ] [Xie, Xuanxuan]Beijing Univ Technol, Beijing Engn Res Ctr Laser Technol, Beijing 100124, Peoples R China
  • [ 15 ] [Han, Gang]Beijing Univ Technol, Fac Mat & Mfg, Inst Laser Engn, Beijing 100124, Peoples R China
  • [ 16 ] [Liu, Furong]Beijing Univ Technol, Fac Mat & Mfg, Inst Laser Engn, Beijing 100124, Peoples R China
  • [ 17 ] [Zhang, Yongzhi]Beijing Univ Technol, Fac Mat & Mfg, Inst Laser Engn, Beijing 100124, Peoples R China
  • [ 18 ] [Li, Wenqiang]Beijing Univ Technol, Fac Mat & Mfg, Inst Laser Engn, Beijing 100124, Peoples R China
  • [ 19 ] [Chen, Qingyuan]Beijing Univ Technol, Fac Mat & Mfg, Inst Laser Engn, Beijing 100124, Peoples R China
  • [ 20 ] [Li, Yu]Beijing Univ Technol, Fac Mat & Mfg, Inst Laser Engn, Beijing 100124, Peoples R China
  • [ 21 ] [Xie, Xuanxuan]Beijing Univ Technol, Fac Mat & Mfg, Inst Laser Engn, Beijing 100124, Peoples R China
  • [ 22 ] [Li, Jingwen]Nanjing Univ Sci & Technol, Sch Mech Engn, Nanjing 210094, Peoples R China

Reprint Author's Address:

  • 刘富荣

    [Liu, Furong]Beijing Univ Technol, Minist Educ, Key Lab Trans Scale Laser Mfg, Beijing 100124, Peoples R China

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Source :

JOURNAL OF ALLOYS AND COMPOUNDS

ISSN: 0925-8388

Year: 2021

Volume: 877

6 . 2 0 0

JCR@2022

ESI Discipline: MATERIALS SCIENCE;

ESI HC Threshold:116

JCR Journal Grade:1

Cited Count:

WoS CC Cited Count: 4

SCOPUS Cited Count: 4

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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