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Defect and interlayer coupling tuned quasiparticle scattering in 2D disordered Mo2C superconducting microcrystals
Gedeon, Habakubaho; Zhang, Zongyuan; Shao, Zhibin; Xu, Chuan; Sun, Haigen; Li, Shaojian; Cao, Yan; Cheng, Zhengwang; Zhang, Xin; Bian, Qi; Liu, Zhibo; Cheng, Hui-Ming; Ren, Wencai; Pan, Minghu
2020-10-21
Source PublicationJOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume53Issue:43
AbstractRecently, two-dimensional (2D) materials have exhibited many exotic properties, such as topological bands, superconductivity, etc. Among these intriguing systems, interface engineering plays a critical role in inducing, manipulating and even enhancing the properties. Our scanning tunneling microscopic/spectroscopic (STM/S) analysis of 2D superconducting thin alpha-Mo2C crystal has previously revealed the enhanced T-C= 8.02 K originating from the lattice defects. With the sameT(C), here we demonstrate that the scattering mechanism leads to a more consistent picture to understand the superconductivity in a defected crystal, which can be tuned by interlayer coupling. Using a low-temperature STM, dI/dVspectra were fitted with the Dynes formula to extract the quasiparticle scattering rates at various temperatures. Moreover, the STS analysis of defective sample surfaces and terraces reveals that both quasiparticle scattering rates and zero-bias conductance oscillate as a result of interlayer coupling variation. A temperature-dependent model considering elastic, electron-electron, and electron-phonon inelastic scattering rates was used to fit excellently the quasiparticle scattering rates measured along defects and terraces. The electron-electron scattering rate exhibits a negative fitting parameter, indicating the loss of inelastic electron-electron scattering rate. Additionally, the elastic scattering rate is much higher than the total inelastic scattering rate, which is an indication of the retarded quasiparticle interactions with impurities.
DOI10.1088/1361-6463/aba067
WOS IDWOS:000560655100001
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/82428
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Gedeon, Habakubaho,Zhang, Zongyuan,Shao, Zhibin,et al. Defect and interlayer coupling tuned quasiparticle scattering in 2D disordered Mo2C superconducting microcrystals[J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS,2020,53(43).
APA Gedeon, Habakubaho.,Zhang, Zongyuan.,Shao, Zhibin.,Xu, Chuan.,Sun, Haigen.,...&Pan, Minghu.(2020).Defect and interlayer coupling tuned quasiparticle scattering in 2D disordered Mo2C superconducting microcrystals.JOURNAL OF PHYSICS D-APPLIED PHYSICS,53(43).
MLA Gedeon, Habakubaho,et al."Defect and interlayer coupling tuned quasiparticle scattering in 2D disordered Mo2C superconducting microcrystals".JOURNAL OF PHYSICS D-APPLIED PHYSICS 53.43(2020).
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