Surface State Bands in Superconducting (PtxIr1-x)Te2
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KONG Wan-Dong,
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MIAO Hu,
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QIAN Tian,
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WANG Zhi-Jun,
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XU Gang,
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FANG Ai-Fang,
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HUANG Yao-Bo,
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ZHANG Peng,
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SHI Xun,
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FANG Zhong,
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DAI Xi,
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RICHARD Pierre,
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WANG Nan-Lin,
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DING Hong
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Abstract
Angle-resolved photoemission spectroscopy is performed to study the bulk and surface electronic structures of non-superconducting IrTe2 and superconducting Pt0.05Ir0.95Te2. In addition to the bulk electronic bands predicted by the local density approximation calculations, we observe two Dirac cone-like bands at the Brillouin zone center, which are non-dispersive along kz, suggesting that the extra bands are surface state bands. As the experimental results are well consistent with the ab initio calculations of surface states, the parity analysis proves that these surface state bands are topologically trivial and thus exclude (PtxIr1-x)Te2 as a possible topological superconductor candidate.
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Cite this article:
KONG Wan-Dong, MIAO Hu, QIAN Tian, WANG Zhi-Jun, XU Gang, FANG Ai-Fang, HUANG Yao-Bo, ZHANG Peng, SHI Xun, FANG Zhong, DAI Xi, RICHARD Pierre, WANG Nan-Lin, DING Hong. Surface State Bands in Superconducting (Pt
xIr
1-x)Te
2[J].
Chin. Phys. Lett., 2015, 32(7): 077402.
DOI: 10.1088/0256-307X/32/7/077402
KONG Wan-Dong, MIAO Hu, QIAN Tian, WANG Zhi-Jun, XU Gang, FANG Ai-Fang, HUANG Yao-Bo, ZHANG Peng, SHI Xun, FANG Zhong, DAI Xi, RICHARD Pierre, WANG Nan-Lin, DING Hong. Surface State Bands in Superconducting (PtxIr1-x)Te2[J]. Chin. Phys. Lett., 2015, 32(7): 077402. DOI: 10.1088/0256-307X/32/7/077402
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KONG Wan-Dong, MIAO Hu, QIAN Tian, WANG Zhi-Jun, XU Gang, FANG Ai-Fang, HUANG Yao-Bo, ZHANG Peng, SHI Xun, FANG Zhong, DAI Xi, RICHARD Pierre, WANG Nan-Lin, DING Hong. Surface State Bands in Superconducting (PtxIr1-x)Te2[J]. Chin. Phys. Lett., 2015, 32(7): 077402. DOI: 10.1088/0256-307X/32/7/077402
KONG Wan-Dong, MIAO Hu, QIAN Tian, WANG Zhi-Jun, XU Gang, FANG Ai-Fang, HUANG Yao-Bo, ZHANG Peng, SHI Xun, FANG Zhong, DAI Xi, RICHARD Pierre, WANG Nan-Lin, DING Hong. Surface State Bands in Superconducting (PtxIr1-x)Te2[J]. Chin. Phys. Lett., 2015, 32(7): 077402. DOI: 10.1088/0256-307X/32/7/077402
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