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Title: Anisotropic in-plane thermal conductivity of black phosphorus nanoribbons at temperatures higher than 100 K

Black phosphorus attracts enormous attention as a promising layered material for electronic, optoelectronic and thermoelectric applications. Here we report large anisotropy in in-plane thermal conductivity of single-crystal black phosphorus nanoribbons along the zigzag and armchair lattice directions at variable temperatures. Thermal conductivity measurements were carried out under the condition of steady-state longitudinal heat flow using suspended-pad micro-devices. We discovered increasing thermal conductivity anisotropy, up to a factor of two, with temperatures above 100 K. A size effect in thermal conductivity was also observed in which thinner nanoribbons show lower thermal conductivity. Analysed with the relaxation time approximation model using phonon dispersions obtained based on density function perturbation theory, the high anisotropy is attributed mainly to direction-dependent phonon dispersion and partially to phonon–phonon scattering. Lastly, our results revealing the intrinsic, orientation-dependent thermal conductivity of black phosphorus are useful for designing devices, as well as understanding fundamental physical properties of layered materials.
Authors:
 [1] ;  [2] ;  [1] ;  [3] ;  [1] ;  [2] ;  [1] ;  [3] ;  [1] ;  [1] ;  [4] ;  [5] ; ;  [6] ;  [2] ;  [3] ;  [7]
  1. Univ. of California, Berkeley, CA (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  3. Arizona State Univ., Mesa, AZ (United States)
  4. Stanford Univ., CA (United States)
  5. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  6. Institute of Materials Research and Engineering (Singapore). A*STAR
  7. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Grant/Contract Number:
FG02-11ER46796; AC02-05CH11231
Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 6; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1256041
Alternate Identifier(s):
OSTI ID: 1407299

Lee, Sangwook, Yang, Fan, Suh, Joonki, Yang, Sijie, Lee, Yeonbae, Li, Guo, Sung Choe, Hwan, Suslu, Aslihan, Chen, Yabin, Ko, Changhyun, Park, Joonsuk, Liu, Kai, Li, Jingbo, Hippalgaonkar, Kedar, Urban, Jeffrey J., Tongay, Sefaattin, and Wu, Junqiao. Anisotropic in-plane thermal conductivity of black phosphorus nanoribbons at temperatures higher than 100 K. United States: N. p., Web. doi:10.1038/ncomms9573.
Lee, Sangwook, Yang, Fan, Suh, Joonki, Yang, Sijie, Lee, Yeonbae, Li, Guo, Sung Choe, Hwan, Suslu, Aslihan, Chen, Yabin, Ko, Changhyun, Park, Joonsuk, Liu, Kai, Li, Jingbo, Hippalgaonkar, Kedar, Urban, Jeffrey J., Tongay, Sefaattin, & Wu, Junqiao. Anisotropic in-plane thermal conductivity of black phosphorus nanoribbons at temperatures higher than 100 K. United States. doi:10.1038/ncomms9573.
Lee, Sangwook, Yang, Fan, Suh, Joonki, Yang, Sijie, Lee, Yeonbae, Li, Guo, Sung Choe, Hwan, Suslu, Aslihan, Chen, Yabin, Ko, Changhyun, Park, Joonsuk, Liu, Kai, Li, Jingbo, Hippalgaonkar, Kedar, Urban, Jeffrey J., Tongay, Sefaattin, and Wu, Junqiao. 2015. "Anisotropic in-plane thermal conductivity of black phosphorus nanoribbons at temperatures higher than 100 K". United States. doi:10.1038/ncomms9573. https://www.osti.gov/servlets/purl/1256041.
@article{osti_1256041,
title = {Anisotropic in-plane thermal conductivity of black phosphorus nanoribbons at temperatures higher than 100 K},
author = {Lee, Sangwook and Yang, Fan and Suh, Joonki and Yang, Sijie and Lee, Yeonbae and Li, Guo and Sung Choe, Hwan and Suslu, Aslihan and Chen, Yabin and Ko, Changhyun and Park, Joonsuk and Liu, Kai and Li, Jingbo and Hippalgaonkar, Kedar and Urban, Jeffrey J. and Tongay, Sefaattin and Wu, Junqiao},
abstractNote = {Black phosphorus attracts enormous attention as a promising layered material for electronic, optoelectronic and thermoelectric applications. Here we report large anisotropy in in-plane thermal conductivity of single-crystal black phosphorus nanoribbons along the zigzag and armchair lattice directions at variable temperatures. Thermal conductivity measurements were carried out under the condition of steady-state longitudinal heat flow using suspended-pad micro-devices. We discovered increasing thermal conductivity anisotropy, up to a factor of two, with temperatures above 100 K. A size effect in thermal conductivity was also observed in which thinner nanoribbons show lower thermal conductivity. Analysed with the relaxation time approximation model using phonon dispersions obtained based on density function perturbation theory, the high anisotropy is attributed mainly to direction-dependent phonon dispersion and partially to phonon–phonon scattering. Lastly, our results revealing the intrinsic, orientation-dependent thermal conductivity of black phosphorus are useful for designing devices, as well as understanding fundamental physical properties of layered materials.},
doi = {10.1038/ncomms9573},
journal = {Nature Communications},
number = ,
volume = 6,
place = {United States},
year = {2015},
month = {10}
}

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