Defect and interlayer coupling tuned quasiparticle scattering in 2D disordered Mo2C superconducting microcrystals

doi:10.1088/1361-6463/aba067

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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 Publication	JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume	53 Issue:43
Abstract	Recently, 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.
DOI	10.1088/1361-6463/aba067
WOS ID	WOS:000560655100001
Citation statistics
Document Type	期刊论文
Identifier	http://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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