Effect of structural supermodulation on superconductivity in tri-layer cuprate Bi2Sr2Ca2Cu3O10+x

Autor:	Zou, Changwei, Hao, Zhenqi, Li, Haiwei, Li, Xintong, Ye, Shusen, Yu, Li, Lin, Chengtian, Wang, Yayu
Rok vydání:	2019
Předmět:	Condensed Matter - Superconductivity Condensed Matter - Strongly Correlated Electrons
Zdroj:	Phys. Rev. Lett. 124, 047003 (2020)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.124.047003
Popis:	We investigate the spatial and doping evolutions of the superconducting properties of tri-layer cuprate Bi2Sr2Ca2Cu3O10+x by using scanning tunneling microscopy and spectroscopy. Both the superconducting coherence peak and gap size exhibit periodic variations with the structural supermodulation, but the effect is much more pronounced in the underdoped regime than at optimal doping. Moreover, a new type of tunneling spectrum characterized by two superconducting gaps emerges with increasing doping, and the two-gap features also correlate with the supermodulation. We propose that the interaction between the inequivalent outer and inner CuO2 planes is responsible for these novel features that are unique to tri-layer cuprates. Comment: 14 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1905.02439 Zobrazit plný text záznamu View this record from Arxiv