Pseudo-magnetic field-induced slow carrier dynamics in periodically strained graphene

• DOI: 10.1038/s41467-021-25304-0
• Publication Date: 2021-08-24T10:05:20Z
• Authors: Dong-Ho Kang; Hao Sun; Manlin Luo; Kunze Lu; Melvina Chen; Youngmin Kim; Yongduck Jung; Xuejiao Gao; Samuel Jior Parlu...; Junyu Ge; See Wee Koh; David Giovanni; Tze Chien Sum; Qi Jie Wang; Hong Li; Donguk Nam
• Keywords: Dynamics

The creation of pseudo-magnetic fields in strained graphene has emerged as a promising route to allow observing intriguing physical phenomena that would be unattainable with laboratory superconducting magnets. Scanning tunneling spectroscopy experiments have successfully measured the pseudo-Landau levels and proved existence various systems. These giant observed highly deformed can substantially alter optical properties beyond level feasible an external magnetic field, but experimental signatures influence such yet unveiled. Here, using time-resolved infrared pump-probe spectroscopy, we provide unambiguous evidence for ultra-slow carrier dynamics enabled by periodically graphene. Strong ~100 T created non-uniform strain nanopillars are found significantly decelerate relaxation processes hot carriers more than order magnitude. Our finding presents unforeseen opportunities harnessing new physics optoelectronics condensed matter physics.