Large tuning of the optical properties of nanoscale NdNiO3 via electron doping

Autor:	Jin, Yeonghoon, Qu, Teng, Kumar, Siddharth, Kubzdela, Nicola, Tsai, Cheng-Chia, De Li, Tai, Ramanathan, Shriram, Yu, Nanfang, Kats, Mikhail A.
Rok vydání:	2024
Předmět:	Condensed Matter - Materials Science Condensed Matter - Strongly Correlated Electrons Physics - Applied Physics Physics - Optics Quantum Physics
Druh dokumentu:	Working Paper
Popis:	We synthesized crystalline films of neodymium nickel oxide (NdNiO3), a perovskite quantum material, switched the films from a metal phase (intrinsic) into an insulator phase (electron-doped) by field-driven lithium-ion intercalation, and characterized their structural and optical properties. Time-of-flight secondary-ion mass spectrometry (ToF-SIMS) showed that the intercalation process resulted in a gradient of the dopant concentration along the thickness direction of the films, turning the films into insulator-metal bilayers. We used variable-angle spectroscopic ellipsometry to measure the complex refractive indices of the metallic and insulating phases of NdNiO3. The insulator phase has a refractive index of n ~ 2 and low absorption in the visible and near infrared, and analysis of the complex refractive indices indicated that the band gap of the insulating phase is roughly 3-4 eV. Electrical control of the optical band gap, with corresponding large changes to the optical refractive indices, creates new opportunities for tunable optics. Comment: Main text + supplementary
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2411.15679 Zobrazit plný text záznamu View this record from Arxiv