The hottest research and invention of polarization

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Among the polarization diode

diode electronic components researched and invented by Hefei Research Institute, a device with two electrodes only allows current to flow in a single direction, and many uses are based on its rectification function. Varactor diode) is used as an electronic adjustable capacitor. The current directivity of most diodes is usually called "rectification" function. The common function of diodes is to allow current to pass only in a single direction and block it in the reverse direction

recently, the Sheng Zhigao research team of the strong magnetic field center of the Hefei Research Institute of the Chinese Academy of Sciences, in cooperation with researchers from the Institute of physics of the Chinese Academy of Sciences and the Ningbo Institute of materials of the Chinese Academy of Sciences, invented a new electronic component - "polarization diode", which may become the basic component of electronic devices in the future

the research team introduced an appropriate amount of oxygen vacancies into the dielectric material strontium titanate (SrTiO3) through electrical fatigue. These oxygen vacancies and their surrounding electrons form "polarons", which can form polarization (P) under the action of electric field. Then, by preparing the heterojunction composed of metal titanium and fatigue strontium titanate, the components of bolt change experimental machine with rectification effect are constructed

with the help of the strong magnetic field center steady-state strong magnetic field experimental device (shmff) ultrafast optical test system under the superconducting magnet, the component was studied in detail. It is found that when a negative electric field (-v) is applied to the device, a very weak polarization P is formed at the interface; When a positive electric field (+v) is applied to the component, a very strong polarization P is formed at the interface. This asymmetric P-V relationship shows that the device has polarization rectification effect. It is a kind of polarization diode and may become the basic component of electronic devices in the future

from the perspective of migration, electrons can be divided into two categories: Cruise electrons and local electrons. For electronic components with cruising electrons as the carrier, there are two relationships between current (J) and voltage (V) under the action of electric field. The first is a resistance element with symmetrical J-V relationship; The second is a current diode with asymmetric J-V relationship (rectification effect). Current diode is widely used in storage, computing, communication, display and other fields, and has become a key basic component in modern electronics. For electronic components with local electrons as the carrier, the situation is slightly different

in addition, capacitors and other components with symmetrical polarization (P) and voltage (V) relationship have long been invented. However, electronic components with asymmetric P-V relationship (polarization rectification effect) have not been reported so far. Therefore, high control requirements such as constant rate, constant strain and constant stress can be achieved. If the industrial development level is not high, and an asymmetric P-V relationship can be found to form an polarized rectification effect, it can be made into a polarization diode, which will have a very important potential application value in the fields of rectifier, storage and computing

finally, the fast-growing express industry has become a major energy consumer. We learned that there are many kinds of diodes, which can be divided into Germanium Diodes (GE tubes) and silicon diodes (Si tubes) according to the semiconductor materials used. According to their different uses, they can be divided into detection diodes, rectifier diodes, zener diodes, switching diodes, isolation diodes, Schottky diodes, light-emitting diodes, silicon power switching diodes, rotating diodes, etc

according to the tube core structure, it can be divided into point contact diode, surface contact diode and planar diode. The point contact diode is pressed on the surface of the bright and clean semiconductor chip with a very thin metal wire, and the pulse current is applied to make one end of the wire firmly sintered with the chip to form a "PN junction". Because it is a point contact, it is only allowed to pass a small current (no more than tens of milliamps), which is suitable for high-frequency low current circuits, such as radio detection. The "PN junction" area of the surface contact diode is large, allowing a large current (a few to dozens of a), which is mainly used in the "rectification" circuit that converts alternating current into direct current. Planar diode is a special silicon diode, which can not only pass large current, but also has stable and reliable performance. It is mostly used in switches, pulses and high-frequency circuits

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