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Electrostatic tuning of Kondo effect in a rare-earth-doped wide-band-gap oxide

หน่วยงาน Nanyang Technological University, Singapore

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ชื่อเรื่อง : Electrostatic tuning of Kondo effect in a rare-earth-doped wide-band-gap oxide
นักวิจัย : Li, Yongfeng , Deng, Rui , Lin, Weinan , Tian, Yufeng , Peng, Haiyang , Yi, Jiabao , Yao, Bin , Wu, Tom
คำค้น : -
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2556
อ้างอิง : Li, Y., Deng, R., Lin, W., Tian, Y., Peng, H., Yi, J., et al. (2013). Electrostatic tuning of Kondo effect in a rare-earth-doped wide-band-gap oxide. Physical Review B, 87(15), 155151-. , 1098-0121 , http://hdl.handle.net/10220/10228 , http://dx.doi.org/10.1103/PhysRevB.87.155151
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Physical review B
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

As a long-lived theme in solid-state physics, the Kondo effect reflects the many-body physics involving the short-range Coulomb interactions between itinerant electrons and localized spins in metallic materials. Here we show that the Kondo effect is present in ZnO, a prototypical wide-band-gap oxide, doped with a rare-earth element (Gd). The localized 4f electrons of Gd ions do not produce remanent magnetism, but interact strongly with the host electrons, giving rise to a saturating resistance upturn and negative magnetoresistance at low temperatures. Furthermore, the Kondo temperature and resistance can be electrostatically modulated using electric-double-layer gating with liquid ionic electrolyte. Our experiments provide the experimental evidence of tunable Kondo effect in ZnO, underscoring the magnetic interactions between localized and itinerant electrons and the emergent transport behaviors in such doped wide-band-gap oxides.

บรรณานุกรม :
Li, Yongfeng , Deng, Rui , Lin, Weinan , Tian, Yufeng , Peng, Haiyang , Yi, Jiabao , Yao, Bin , Wu, Tom . (2556). Electrostatic tuning of Kondo effect in a rare-earth-doped wide-band-gap oxide.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Li, Yongfeng , Deng, Rui , Lin, Weinan , Tian, Yufeng , Peng, Haiyang , Yi, Jiabao , Yao, Bin , Wu, Tom . 2556. "Electrostatic tuning of Kondo effect in a rare-earth-doped wide-band-gap oxide".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Li, Yongfeng , Deng, Rui , Lin, Weinan , Tian, Yufeng , Peng, Haiyang , Yi, Jiabao , Yao, Bin , Wu, Tom . "Electrostatic tuning of Kondo effect in a rare-earth-doped wide-band-gap oxide."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2556. Print.
Li, Yongfeng , Deng, Rui , Lin, Weinan , Tian, Yufeng , Peng, Haiyang , Yi, Jiabao , Yao, Bin , Wu, Tom . Electrostatic tuning of Kondo effect in a rare-earth-doped wide-band-gap oxide. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2556.