Optically Probing Unconventional Superconductivity in Atomically Thin Bi2Sr2Ca0.92Y0.08Cu2O8+δ

• DOI: 10.1021/acs.nanolett.4c00559
• Publication Date: 2024-03-19T13:48:46Z
• Authors: Yunhuan Xiao; Jingda Wu; Jerry I. Dadap; Kashif Masud Awan; Dongyang Yang; Jing Liang; Kenji Watanabe; Takashi Taniguchi; Marta Zonno; Martin Bluschke; Hiroshi Eisaki; Martin Greven; Andrea Damascelli; Ziliang Ye
• Keywords: Condensed Matter - Mesoscale and Nanoscale Physics; Condensed Matter - Superconductivity

Atomically thin cuprates exhibiting a superconducting phase transition temperature similar to that of the bulk have recently been realized, although device fabrication remains challenge and limits potential for many novel studies applications. Here, we use an optical pump–probe approach noninvasively study unconventional superconductivity in atomically Bi2Sr2Ca0.92Y0.08Cu2O8+δ (Y-Bi2212). Apart from finding response due is Y-Bi2212, observe sign amplitude signal flakes vary significantly different dielectric environments depending on nature excitation. By exploiting spatial resolution probe, uncover exceptional sensitivity monolayer Y-Bi2212 environment. Our results provide first evidence intralayer condensate Bi2212 highlight role double-sided encapsulation preserving cuprates.