Unusual Angular Dependence of the Raman Response in Black Phosphorus
- 9 March 2015
- journal article
- research article
- Published by American Chemical Society (ACS) in ACS Nano
- Vol. 9 (4) , 4270-4276
Abstract
Anisotropic materials are characterized by a unique optical response, which is highly polarization-dependent. Of particular interest are layered materials formed by the stacking of two-dimensional (2D) crystals that are naturally anisotropic in the direction perpendicular to the 2D planes. Black phosphorus (BP) is a stack of 2D phosphorene crystals and a highly anisotropic semiconductor with a direct band gap. We show that the angular dependence of polarized Raman spectra of BP is rather unusual and can be explained only by considering complex values for the Raman tensor elements. This result can be traced back to the electron–photon and electron–phonon interactions in this material.Keywords
Funding Information
- Universidad de Antioquia (MDC 11-1-06)
- Fundação de Amparo à Pesquisa do Estado de São Paulo (2012/50259-8)
- National Research Foundation-Prime Minister's office, Republic of Singapore (R-144-000-295-281)
- Brazilian Nanocarbon Institute of Science and Technology
- Conselho Nacional de Desenvolvimento Científico e Tecnológico
This publication has 31 references indexed in Scilit:
- High-mobility transport anisotropy and linear dichroism in few-layer black phosphorusNature Communications, 2014
- Isolation and characterization of few-layer black phosphorus2D Materials, 2014
- Fast and Broadband Photoresponse of Few-Layer Black Phosphorus Field-Effect TransistorsNano Letters, 2014
- Strain-Induced Gap Modification in Black PhosphorusPhysical Review Letters, 2014
- Phosphorene: An Unexplored 2D Semiconductor with a High Hole MobilityACS Nano, 2014
- Electric field effect in ultrathin black phosphorusApplied Physics Letters, 2014
- Black phosphorus field-effect transistorsNature Nanotechnology, 2014
- Determination of the phase difference between the Raman tensor elements of the -like phonons inPhysical Review B, 1998
- Calculation of band structure and superconductivity in the simple cubic phase of phosphorusJournal of Low Temperature Physics, 1989
- Anomalous superconductivity and pressure induced phase transitions in black phosphorusSolid State Communications, 1985