Photoinduced Kondo effect in CeZn\(_{3}\)P\(_{3}\)

• Published in: arXiv.org
• Main Authors: Kitagawa, Jiro, Kitajima, Daiki, Shimokawa, Kenji, Takaki, Hiroto
• Format: Paper Journal Article
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 06.01.2016
• Subjects: Carbon nanotubes; Continuous wave lasers; Electrons; Illumination; Kondo effect; Light; Magnetic fields; Magnetic materials; Magnetic moments; Physics - Strongly Correlated Electrons; Quantum computing; Quantum dots; Quantum phenomena; Semiconductor lasers; Temperature dependence
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.1509.04909

The Kondo effect, which originates from the screening of a localized magnetic moment by a spin-spin interaction, is widely observed in non-artificial magnetic materials, artificial quantum dots, and carbon nanotubes. In devices based on quantum dots or carbon nanotubes that target quantum information applications, the Kondo effect can be tuned by a gate voltage, a magnetic field, or light. However, the manipulation of the Kondo effect in non-artificial materials has not been thoroughly studied; in particular, the artificial creation of the Kondo effect remains unexplored. Per this subject study, however, a new route for the optical creation of the Kondo effect in the non-artificial material \(p\)-type semiconductor CeZn\(_{3}\)P\(_{3}\) is presented. The Kondo effect emerges under visible-light illumination of the material by a continuous-wave laser diode and is ultimately revealed by photoinduced electrical resistivity, which clearly exhibits a logarithmic temperature dependency. By contrast, a La-based compound (LaZn\(_{3}\)P\(_{3}\)) displays only normal metallic behavior under similar illumination. The photoinduced Kondo effect, which occurs at higher temperatures when compared with the Kondo effect in artificial systems, provides a potential new range of operation for not only quantum information/computation devices but also for operation of magneto-optic devices thereby expanding the range of device applications based on the Kondo effect.