| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Single Crystal Growth and Physical Property Characterization of Non-centrosymmetric Superconductor PbTaSe$_2$ |
| Yu-Jia Long1,2, Ling-Xiao Zhao2, Pei-Pei Wang2, Huai-Xin Yang2, Jian-Qi Li2,3, Hai Zi2, Zhi-An Ren2, Cong Ren2**, Gen-Fu Chen1,2,3** |
1Department of Physics, Renmin University of China, Beijing 100872
2National Laboratory for Superconductivity, Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190
3Collaborative Innovation Center of Advanced Microstructures, Beijing 100190
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| Cite this article: |
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Yu-Jia Long, Ling-Xiao Zhao, Pei-Pei Wang et al 2016 Chin. Phys. Lett. 33 037401 |
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Abstract We report on the single crystal growth and superconducting properties of PbTaSe$_2$ with the non-centrosymmetric crystal structure. By using the chemical vapor transport technique, centimeter-size single crystals are successfully obtained. The measurement of temperature dependence of electrical resistivity $\rho(T)$ in both normal and superconducting states indicates a quasi-two-dimensional electronic state in contrast to that of polycrystalline samples. Specific heat $C(T)$ measurement reveals a bulk superconductivity with $T_{\rm c}\simeq3.75$ K and a specific heat jump ratio of 1.42. All these results are in agreement with a moderately electron–phonon coupled, type-II Bardeen–Cooper–Schrieffer superconductor.
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Received: 04 December 2015
Published: 31 March 2016
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| PACS: |
74.25.-q
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(Properties of superconductors)
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74.62.Bf
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(Effects of material synthesis, crystal structure, and chemical composition)
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74.20.Rp
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(Pairing symmetries (other than s-wave))
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