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Optically Probing Unconventional Superconductivity in Atomically Thin Bi 2 Sr 2 Ca 0.92 Y 0.08 Cu 2 O 8+δ .
- Source :
-
Nano letters [Nano Lett] 2024 Apr 03; Vol. 24 (13), pp. 3986-3993. Date of Electronic Publication: 2024 Mar 19. - Publication Year :
- 2024
-
Abstract
- Atomically thin cuprates exhibiting a superconducting phase transition temperature similar to that of the bulk have recently been realized, although the device fabrication remains a challenge and limits the potential for many novel studies and applications. Here, we use an optical pump-probe approach to noninvasively study the unconventional superconductivity in atomically thin Bi <subscript>2</subscript> Sr <subscript>2</subscript> Ca <subscript>0.92</subscript> Y <subscript>0.08</subscript> Cu <subscript>2</subscript> O <subscript>8+δ</subscript> (Y-Bi2212). Apart from finding an optical response due to the superconducting phase transition that is similar to that of bulk Y-Bi2212, we observe that the sign and amplitude of the pump-probe signal in atomically thin flakes vary significantly in different dielectric environments depending on the nature of the optical excitation. By exploiting the spatial resolution of the optical probe, we uncover the exceptional sensitivity of monolayer Y-Bi2212 to the environment. Our results provide the first optical evidence for the intralayer nature of the superconducting condensate in Bi2212 and highlight the role of double-sided encapsulation in preserving superconductivity in atomically thin cuprates.
Details
- Language :
- English
- ISSN :
- 1530-6992
- Volume :
- 24
- Issue :
- 13
- Database :
- MEDLINE
- Journal :
- Nano letters
- Publication Type :
- Academic Journal
- Accession number :
- 38501960
- Full Text :
- https://doi.org/10.1021/acs.nanolett.4c00559