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Title: Ultralow-frequency collective compression mode and strong interlayer coupling in multilayer black phosphorus

Journal Article · · Physical Review Letters
 [1];  [1];  [1];  [1];  [2];  [3];  [3];  [1];  [1];  [4];  [5];  [6]
  1. Renmin Univ. of China, Beijing (People's Republic of China)
  2. Chinese Academy of Sciences, Anhui (People's Republic of China)
  3. Chinese Academy of Sciences, Anhui (People's Republic of China); Collaborative Innovation Center of Advanced Microstructures, Nanjing (People's Republic of China)
  4. Univ. of Nevada, Las Vegas, NV (United States)
  5. Renmin Univ. of China, Beijing (People's Republic of China); Shanghai Jiao Tong Univ., Shanghai (People's Republic of China); Collaborative Innovation Center of Advanced Microstructures, Nanjing (People's Republic of China)
  6. Renmin Univ. of China, Beijing (People's Republic of China); Collaborative Innovation Center of Advanced Microstructures, Nanjing (People's Republic of China)

The recent renaissance of black phosphorus (BP) as a two-dimensional (2D) layered material has generated tremendous interest, but its unique structural characters underlying many of its outstanding properties still need elucidation. Here we report Raman measurements that reveal an ultralow-frequency collective compression mode (CCM) in BP, which is unprecedented among similar 2D layered materials. This novel CCM indicates an unusually strong interlayer coupling, and this result is quantitatively supported by a phonon frequency analysis and first-principles calculations. Moreover, the CCM and another branch of low-frequency Raman modes shift sensitively with changing number of layers, allowing an accurate determination of the thickness up to tens of atomic layers, which is considerably higher than previously achieved by using high-frequency Raman modes. Lastly, these findings offer fundamental insights and practical tools for further exploration of BP as a highly promising new 2D semiconductor.

Research Organization:
Univ. of Nevada, Las Vegas, NV (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0001982
OSTI ID:
1332451
Alternate ID(s):
OSTI ID: 1239620
Journal Information:
Physical Review Letters, Vol. 116, Issue 8; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 45 works
Citation information provided by
Web of Science

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Cited By (15)

Phosphorene: Current status, challenges and opportunities journal June 2019
Black Phosphorus Quantum Dots Used for Boosting Light Harvesting in Organic Photovoltaics journal September 2017
Black Phosphorus Nanosheets: Synthesis, Characterization and Applications journal May 2016
Stacking-dependent interlayer phonons in 3R and 2H MoS 2 journal February 2019
Highly In‐Plane Anisotropic 2D GeAs 2 for Polarization‐Sensitive Photodetection journal August 2018
Progress on Black Phosphorus Photonics journal July 2018
Promise and Challenge of Phosphorus in Science, Technology, and Application journal September 2018
Applications of Phosphorene and Black Phosphorus in Energy Conversion and Storage Devices journal December 2017
Curvature analysis of single layer graphene on the basis of extreme low-frequency Raman spectroscopy journal April 2019
Spotting the differences in two-dimensional materials – the Raman scattering perspective journal January 2018
Elemental two-dimensional nanosheets beyond graphene journal January 2017
Anomalous interlayer vibrations in strongly coupled layered PdSe 2 journal May 2018
Black Phosphorus: Optical Characterization, Properties and Applications journal July 2017
Lattice Vibration and Raman Scattering in Anisotropic Black Phosphorus Crystals journal April 2018
Black Phosphorus Quantum Dots Used for Boosting Light Harvesting in Organic Photovoltaics journal September 2017