Observation of unusual topological surface states in half-Heusler compounds LnPtBi (Ln=Lu, Y).
Observation of unusual topological surface states in half-Heusler compounds LnPtBi (Ln=Lu, Y).
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DOI:
10.1038/ncomms12924
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发表时间:
2016-09-27
影响因子:
16.6
通讯作者:
Chen, Y. L.
中科院分区:
文献类型:
--
作者:
Liu, Z. K.;Yang, L. X.;Wu, S. -C.;Shekhar, C.;Jiang, J.;Yang, H. F.;Zhang, Y.;Mo, S. -K.;Hussain, Z.;Yan, B.;Felser, C.;Chen, Y. L.
Topological quantum materials represent a new class of matter with both exotic physical phenomena and novel application potentials. Many Heusler compounds, which exhibit rich emergent properties such as unusual magnetism, superconductivity and heavy fermion behaviour, have been predicted to host non-trivial topological electronic structures. The coexistence of topological order and other unusual properties makes Heusler materials ideal platform to search for new topological quantum phases (such as quantum anomalous Hall insulator and topological superconductor). By carrying out angle-resolved photoemission spectroscopy and ab initio calculations on rare-earth half-Heusler compounds LnPtBi (Ln=Lu, Y), we directly observe the unusual topological surface states on these materials, establishing them as first members with non-trivial topological electronic structure in this class of materials. Moreover, as LnPtBi compounds are non-centrosymmetric superconductors, our discovery further highlights them as promising candidates of topological superconductors. Heusler compounds have been predicted to host topological order with other emergent properties, which yet awaits for experimental evidence. Here, Liu et al. report a direct observation of topological surface states on half-Heusler compounds LnPtBi.
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通讯作者:
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影响因子:
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