Journal
PHYSICAL REVIEW B
Volume 92, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.92.064302
Keywords
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Funding
- MOST [2010CB923000, 2011CBA001000, 2011CBA00102, 2012CB821403, 2013CB921700]
- NSFC of China [11004232, 11034011/A0402, 11234014, 11274362, 11474330]
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We report a polarized Raman study of the Weyl semimetal TaAs. We observe all the optical phonons, with energies and symmetries consistent with our first-principles calculations. We detect additional excitations assigned to multiple-phonon excitations. These excitations are accompanied by broad peaks separated by 140 cm(-1) that are also most likely associated with multiple-phonon excitations. We also noticed a sizable B-1 component for the spectral background, for which the origin remains unclear.
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