{ "id": "1502.03452", "version": "v1", "published": "2014-11-01T18:46:47.000Z", "updated": "2014-11-01T18:46:47.000Z", "title": "Insights into vibrational and electronic properties of MoS$_2$ using Raman, photoluminescence and transport studies", "authors": [ "Achintya Bera", "A. K. Sood" ], "comment": "76 pages, 49 figures", "journal": "Springer International Publishing, 21 ,155-215 (2014)", "categories": [ "cond-mat.mes-hall" ], "abstract": "We review vibrational and electronic properties of single and a few layer MoS$_2$ relevant to understand their resonant and non-resonant Raman scattering results. In particular, the optical modes and low frequency shear and layer breathing modes show significant dependence on the number of MoS$_2$ layers. Further, the electron doping of the MoS$_2$ single layer achieved using top-gating in a field effect transistor renormalizes the two optical modes A$_{1g}$ and E$^1_{2g}$ differently due to symmetry-dependent electron-phonon coupling. The issues related to carrier mobility, the Schottky barrier at the MoS$_2$-metal contact pads and the modifications of the dielectric environment are addressed. The direct optical transitions for single layer-MoS$_2$ involve two excitons at K-point in the Brillouin zone and their stability with temperature and pressure has been reviewed. Finally, the Fermi-level dependence of spectral shift for a quasiparticle, called trion, has been discussed.", "revisions": [ { "version": "v1", "updated": "2014-11-01T18:46:47.000Z" } ], "analyses": { "keywords": [ "electronic properties", "transport studies", "vibrational", "field effect transistor renormalizes", "photoluminescence" ], "tags": [ "journal article" ], "note": { "typesetting": "TeX", "pages": 76, "language": "en", "license": "arXiv", "status": "editable" } } }