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Manipulating high-temperature superconductivity by oxygen doping in Bi2Sr2CaCu2O8+δ thin flakes

National Science Review 2022年第10期9卷 112-119页

作者： Bin Lei Donghui Ma Shihao Liu Zeliang Sun Mengzhu Shi Weizhuang Zhuo Fanghang Yu Genda Gu Zhenyu Wang Xianhui Chen Key Laboratory of Strongly-Coupled Quantum Matter Physics Chinese Academy of Sciences and Department of Physics University of Science and Technology of China CAS Center for Excellence in Quantum Information and Quantum Physics Department of Condensed Matter Physics and Materials Science Brookhaven National Laboratory CAS Center for Excellence in Superconducting Electronics (CENSE) Collaborative Innovation Center of Advanced Microstructures Nanjing University

Harnessing the fascinating properties of correlated oxides requires precise control of their carrier *** to other methods,oxygen doping provides an effective and more direct way to tune the electronic properties of correlated *** several approaches,such as thermal annealing and oxygen migration,have been introduced to change the oxygen content,a continuous and reversible solution that can be integrated with modern electronic technology is much in ***,we report a novel ionic field-effect transistor using solid Gd-doped CeO2as the gate dielectric,which shows a remarkable carrier-density-tuning ability via electric-field-controlled oxygen concentration at room *** Bi2Sr2CaCu2O8+δ(Bi-2212) thin flakes,we achieve a reversible superconductor-insulator transition by driving oxygen ions in and out of the samples with electric fields,and map out the phase diagram all the way from the insulating regime to the over-doped superconducting regime by continuously changing the oxygen doping *** analysis indicates that the reversible superconductor-insulator transition for the Bi-2212 thin flakes follows the theoretical description of a two-dimensional quantum phase *** work provides a route for realizing electric-field control of phase transition in correlated ***,the configuration of this type of transistor makes heterostructure/interface engineering possible,thus having the potential to serve as the next-generation all-solid-state field-effect transistor.

关键词： high-temperature superconductivity oxygen doping electric field effect all-solid-state field effect transistor superconductor–insulator transition

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Electro-statically controllable graphene local heater

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Chinese Physics B 2018年第3期27卷 405-409页

作者： Hui-Shan Wang Lian-Wen Deng Lei Li Qiu-Juan Sun Hong Xie Hao-Min Wang State Key Laboratory of Functional Materials lbr lnformatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China School of Physics and Electronics Central South UniversityChangsha 410083China CAS Center for Excellence in Superconducting Electronics Chinese Academy of SciencesShanghai 200050China School of Electronic Electrical and Communication EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China

We report on current-induced thermal power investigation of graphene nanostructure for potential local-heating *** is found that the efficiency of heating can be greatly improved if graphene is patterned into structures with narrow width and long *** a narrow graphene-ribbon,the Joule heating power exhibits an obvious dependence on the back-gate *** monitoring Raman spectra,the temperature of graphene-ribbon can be *** temperature of graphene-ribbon is modulated by the electric field effect when the sample is sourced with a relatively high current.

关键词： graphene electric field effect Raman

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electrical-field induced nonlinear conductive behavior in dense zirconia ceramic

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Journal of Materials Science & Technology 2017年第8期33卷 897-900页

作者： Yan Gao Fangzhou Liu Dianguang Liu Jinling Liu Yiguang Wang Linan An State Key Laboratory of Traction Power School of Mechanics and EngineeringSouthwestfiaotong UniversityChengdu 610031China School ofMateriais Sdence and Engineering Northwestern Polytechnical UniversityXi'an 710072China Department ofMateriais Sdence and Engineering Advanced Materials Processing and Analysis CenterUniversity of Central FloridaOrlandoFL 32816USA

The effect of the applied electric field on the conductive behavior of zirconia ceramics is studied by measuring its initial current-voltage curve at various temperatures. The results show that when the field strength is higher than the threshold for flash-sintering, the curves exhibit a nonlinear behavior by having an additional current on top of the linear current according to Ohm＇s law. Analyzing its transport behavior reveals that the additional current density is due to the extra oxygen vacancies induced by the electric field. The formation rate of the extra vacancies and associated current was related to the field strength.

关键词： Flash sintering Non-linear conductivity Zirconia electric field effect

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Boosted on-chip energy storage with transistors

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National Science Review 2022年第10期9卷 56-57页

作者： Tongchao Liu Khalil Amine Chemical Sciences and Engineering Division Argonne National Laboratory Materials Science and Engineering Stanford University

On-chip energy-storage devices play an important role in powering wireless environmental sensors and microelectrome chanical systems [1,2].Starting from the 1980s,on-chip energy-storage devices,including microbatteries and super capacitors,have been applied to power the real-time clock on a chip [3].These tiny batteries/supercapacitors enable the real-time clock to keep working when the electronics are *** this way,electronic devices can be restarted with a valid *** the development of electronic devices,signal processing and communication have become much faster,while also requiring more powerful energy-storage devices to drive them [4-6].

关键词： high-temperature superconductivity oxygen doping electric field effect all-solid-state field effect transistor superconductor–insulator transition

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Saturation effects on Ba 6phi （l=0, 2） and 6pnk （｜M｜= 0, 1） autoionization spectra

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Chinese Physics B 2007年第2期16卷 382-391页

作者：李士本戴长建 Department of Physics Wenzhou University Wenzhou 325027 China College of Science Tianjin University of Technology Tianjin 300191 China

Using a three-step laser saturation excitation technique, the saturation effects on the Ba 6pns （J = 1） and 6pad （J = 1, 3） autoionization spectra are observed systemically in zero field. These saturation spectra are introduced to determine the high n members of 6pnl （l = 0, 2） autoionizing series and are used to analyse the channel interactions among the autoionizing series in zero field. Furthermore, the saturation excitation technique is applied to the electric field case, in which the saturation spectra of Ba 6pnk （｜M｜= 0, 1） autoionizing Stark states are measured. Most of these saturation spectra are observed for the first time so far as we know, which indicate the mixing of the autoionizing states in the electric fields.

关键词： saturation excitation isolated-core excitation autoionizing state electric field effect

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