Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/102672
Title: Raman signatures of broken inversion symmetry and in‐plane anisotropy in type‐II Weyl semimetal candidate TaIrTe4
Authors: Liu, Yinan
Gu, Qiangqiang
Peng, Yu
Qi, Shaomian
Zhang, Na
Zhang, Yinong
Ma, Xiumei
Zhu, Rui
Tong, Lianming
Feng, Ji
Liu, Zheng
Chen, Jian‐Hao
Keywords: Engineering::Materials
2D Material
DFT Calculations
Issue Date: 2018
Source: Liu, Y., Gu, Q., Peng, Y., Qi, S., Zhang, N., Zhang, Y., ... Chen, J. (2018). Raman signatures of broken inversion symmetry and in‐plane anisotropy in type‐II Weyl semimetal candidate TaIrTe4. Advanced Materials, 30(25), 1706402-. doi:10.1002/adma.201706402
Series/Report no.: Advanced Materials
Abstract: The layered ternary compound TaIrTe4 is an important candidate to host the recently predicted type‐II Weyl fermions. However, a direct and definitive proof of the absence of inversion symmetry in this material, a prerequisite for the existence of Weyl Fermions, has so far remained evasive. Herein, an unambiguous identification of the broken inversion symmetry in TaIrTe4 is established using angle‐resolved polarized Raman spectroscopy. Combining with high‐resolution transmission electron microscopy, an efficient and nondestructive recipe to determine the exact crystallographic orientation of TaIrTe4 crystals is demonstrated. Such technique could be extended to the fast identification and characterization of other type‐II Weyl fermions candidates. A surprisingly strong in‐plane electrical anisotropy in TaIrTe4 thin flakes is also revealed, up to 200% at 10 K, which is the strongest known electrical anisotropy for materials with comparable carrier density, notably in such good metals as copper and silver.
URI: https://hdl.handle.net/10356/102672
http://hdl.handle.net/10220/50283
ISSN: 0935-9648
DOI: http://dx.doi.org/10.1002/adma.201706402
Rights: This is the peer reviewed version of the following article: Liu, Y., Gu, Q., Peng, Y., Qi, S., Zhang, N., Zhang, Y., ... Chen, J. (2018). Raman signatures of broken inversion symmetry and in‐plane anisotropy in type‐II Weyl semimetal candidate TaIrTe4. Advanced Materials, 30(25), 1706402-. doi:10.1002/adma.201706402, which has been published in final form at http://dx.doi.org/10.1002/adma.201706402. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
metadata.item.grantfulltext: open
metadata.item.fulltext: With Fulltext
Appears in Collections:MSE Journal Articles

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