Growth and Strain Engineering of Trigonal Te for Topological Quantum Phases in Non-Symmorphic Chiral Crystals

Crystals

M.Hasan Doha¹  HughO. H. Churchill¹  Shiva Davari¹  Rabindra Basnet¹  Takayuki Hironaka¹  KatieM. Welch¹  Jin Hu¹  Krishna Pandey² 

[1] Department of Physics, University of Arkansas, Fayetteville, NC 72701, USA;Microelectronics-Photonics Graduate Program, University of Arkansas, Fayetteville, NC 72701, USA;

关键词: Weyl semimetal;    nanowire;    topological semimetal;    strain engineering;    helical materials;   

DOI  :  10.3390/cryst9100486

来源: DOAJ

【 摘 要 】

Strained trigonal Te has been predicted to host Weyl nodes supported by a non-symmorphic chiral symmetry. Using low-pressure physical vapor deposition, we systematically explored the growth of trigonal Te nanowires with naturally occurring strain caused by curvature of the wires. Raman spectra and high mobility electronic transport attest to the highly crystalline nature of the wires. Comparison of Raman spectra for both straight and curved nanowires indicates a breathing mode that is significantly broader and shifted in frequency for the curved wires. Strain induced by curvature during growth therefore may provide a simple pathway to investigate topological phases in trigonal Te.

【 授权许可】

Unknown