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Title: Accessing valley degree of freedom in bulk Tin(II) sulfide at room temperature

Abstract

The field of valleytronics has promised greater control of electronic and spintronic systems with an additional valley degree of freedom. However, conventional and two-dimensional valleytronic systems pose practical challenges in the utilization of this valley degree of freedom. Here we show experimental evidences of the valley effect in a bulk, ambient, and bias-free model system of Tin(II) sulfide. We elucidate the direct access and identification of different sets of valleys, based primarily on the selectivity in absorption and emission of linearly polarized light by optical reflection/transmission and photoluminescence measurements, and demonstrate strong optical dichroic anisotropy of up to 600% and nominal polarization degrees of up to 96% for the two valleys with band-gap values 1.28 and 1.48 eV, respectively; the ease of valley selection further manifested in their non-degenerate nature. Such discovery enables a new platform for better access and control of valley polarization.

Authors:
 [1];  [2];  [3];  [4];  [4];  [2];  [2];  [5];  [4]; ORCiD logo [2];  [1]
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  1. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. National Univ. of Singapore (Singapore)
  3. Nanjing Univ. of Posts and Telecommunications, Nanjing (People's Republic of China)
  4. Univ. of California, Berkeley, CA (United States)
  5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1460351
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 9; Journal Issue: 1; Related Information: © 2018 The Author(s).; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Lin, Shuren, Carvalho, Alexandra, Yan, Shancheng, Li, Roger, Kim, Sujung, Rodin, Aleksandr, Carvalho, Lidia, Chan, Emory M., Wang, Xi, Castro Neto, Antonio H., and Yao, Jie. Accessing valley degree of freedom in bulk Tin(II) sulfide at room temperature. United States: N. p., 2018. Web. doi:10.1038/s41467-018-03897-3.
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Lin, Shuren, Carvalho, Alexandra, Yan, Shancheng, Li, Roger, Kim, Sujung, Rodin, Aleksandr, Carvalho, Lidia, Chan, Emory M., Wang, Xi, Castro Neto, Antonio H., & Yao, Jie. Accessing valley degree of freedom in bulk Tin(II) sulfide at room temperature. United States. https://doi.org/10.1038/s41467-018-03897-3
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Lin, Shuren, Carvalho, Alexandra, Yan, Shancheng, Li, Roger, Kim, Sujung, Rodin, Aleksandr, Carvalho, Lidia, Chan, Emory M., Wang, Xi, Castro Neto, Antonio H., and Yao, Jie. Fri . "Accessing valley degree of freedom in bulk Tin(II) sulfide at room temperature". United States. https://doi.org/10.1038/s41467-018-03897-3. https://www.osti.gov/servlets/purl/1460351.
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@article{osti_1460351,
title = {Accessing valley degree of freedom in bulk Tin(II) sulfide at room temperature},
author = {Lin, Shuren and Carvalho, Alexandra and Yan, Shancheng and Li, Roger and Kim, Sujung and Rodin, Aleksandr and Carvalho, Lidia and Chan, Emory M. and Wang, Xi and Castro Neto, Antonio H. and Yao, Jie},
abstractNote = {The field of valleytronics has promised greater control of electronic and spintronic systems with an additional valley degree of freedom. However, conventional and two-dimensional valleytronic systems pose practical challenges in the utilization of this valley degree of freedom. Here we show experimental evidences of the valley effect in a bulk, ambient, and bias-free model system of Tin(II) sulfide. We elucidate the direct access and identification of different sets of valleys, based primarily on the selectivity in absorption and emission of linearly polarized light by optical reflection/transmission and photoluminescence measurements, and demonstrate strong optical dichroic anisotropy of up to 600% and nominal polarization degrees of up to 96% for the two valleys with band-gap values 1.28 and 1.48 eV, respectively; the ease of valley selection further manifested in their non-degenerate nature. Such discovery enables a new platform for better access and control of valley polarization.},
doi = {10.1038/s41467-018-03897-3},
journal = {Nature Communications},
number = 1,
volume = 9,
place = {United States},
year = {2018},
month = {4}
}
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https://doi.org/10.1038/s41467-018-03897-3
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    Works referencing / citing this record:

    Growth of Large-Area SnS Films with Oriented 2D SnS Layers for Energy-Efficient Broadband Optoelectronics
    journal, August 2018

    • Patel, Malkeshkumar; Kim, Joondong; Kim, Yu Kwon
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    Wrap‐Around Core–Shell Heterostructures of Layered Crystals
    journal, May 2019

    Liquid exfoliation of electronic grade ultrathin tin(II) sulfide (SnS) with intriguing optical response
    journal, January 2020

    • Sarkar, Abdus Salam; Mushtaq, Aamir; Kushavah, Dushyant
    • npj 2D Materials and Applications, Vol. 4, Issue 1
    • DOI: 10.1038/s41699-019-0135-1

    Colloidal tin sulfide nanosheets: formation mechanism, ligand-mediated shape tuning and photo-detection
    journal, January 2018

    • Li, Fu; Ramin Moayed, Mohammad Mehdi; Gerdes, Frauke
    • Journal of Materials Chemistry C, Vol. 6, Issue 35
    • DOI: 10.1039/c8tc02559b

    In-plane anisotropic electronics based on low-symmetry 2D materials: progress and prospects
    journal, January 2020

    • Zhao, Siwen; Dong, Baojuan; Wang, Huide
    • Nanoscale Advances, Vol. 2, Issue 1
    • DOI: 10.1039/c9na00623k

    Phonon band gaps in the IV-VI monochalcogenides
    journal, August 2019

    Quantum confinement-induced enhanced nonlinearity and carrier lifetime modulation in two-dimensional tin sulfide
    journal, January 2020

    Production of SnS2 Nanostructure as Improved Light-Assisted Electrochemical Water Splitting
    journal, September 2019

    Colloidal Tin Sulfide Nanosheets: Formation Mechanism, Ligand-mediated Shape Tuning and Photo-detection
    text, January 2018

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