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Mesoscopic Physics


Developed on the basis of some of the single electron motion control circuits and devices, such as the revolving door device to enable electronic access to the hotel like the revolving door, as one by one through. This area is now known as _ single electron electronics. Fourth, basic research and applications in small scale systems of meaning to a certain extent, the loss from the macro-average of the unique system, which is not hard to imagine. Research began in the early 80's work revealed the unexpected result of the new is that the characteristic scale surprisingly long. People thought it was a few character spacing, or at most elastic scattering mean free path of the scale, in the normal metal is now found in about 10 nm, the scale of mesoscopic system inelastic scattering mean free path of the size of the metal can be microns order of magnitude will increase as the temperature dropped so mesoscopic system similar to the one hand, we are familiar with the microscopic world, showing the characteristics of quantum mechanics; other hand, in terms of its scale is almost the macro. At the present micro-fabrication technology, people can create all forms of such samples, but can be resistance, reluctance and other conventional measurements of Hall coefficient, it feels like we can in atomic, molecular electronic ammeter connected to the voltage on the track table were observed. There is no doubt that these studies of the physical world to deepen people (continued on page 42) SCIENCE AND TECHNOLOGY 7 / 1994 part of the original part of the embryonic development of some new ideas H new concepts, new theories, new methods t. Transformation of the original subjects H 4 new subjects more than the birth of tectonic units. Multi-stage crustal evolution - the development process is set into action, again and again rose into the delivery of (floor), including low-lying areas of the Region I to the third structural units of continental crust progressive law (that)} progressive mineralization theory into a more circular complex deposit shell, mantle creep heat and everything is changing for the hypothesis of a dynamic edge sets f history analysis to pluralism, the progressive theory change, tectonics add a new element to f low-lying areas to add to depression metallogenic type (including of type) mineralization. Other relevant disciplines such as deposits, petrology, historical, ancient geography, science and other new look, but also a corresponding increase gradually the new geochemical f tectonic structure, history ~ causal theory (historical motivation f shell) ground tectonics, geophysics structure to adapt to market economy and modern scientific development. Through the development of disciplines in order to promote scientific development. To this end, the Institute will be decadent to really become a group, co-operative. Research activities and high efficiency, competitive advantage can be organized to develop their common academic thinking. Work together towards the common goal of the whole. In other words, to really become a requirement to adapt to the development of modern scientific research school. Particularly strong on some regional differences in the subjects. For example, earth science, as something to days of relaxation of thick geological conditions. Many geological phenomena are typical, some of which can be compared with wide forks. Are advised to play this role of natural advantages, make full use of their advantages for the international forefront of issues, both from a global point of view. And close contact with their own reality, abandoned on the basis of previous theoretical and create their own new theory. Establish a unique new school, meet the environmental characteristics of our resources to solve the practical problems of production, and promote the development of relevant disciplines. Imitate than to follow the existing theories, it seems so much more dagger Policy Institute, research centers also do so. (Editor cold much initiative) (on the next page G 2j) r points recognition of resistance are of great significance. The large-scale experiments can be and. Also makes it a theoretical physicist and experimental physicists interested in the common sense of the field. This is an area of ​​physics is well to any development of the necessary conditions. From the application point of view, one study mesoscopic physics can be reduced given the lower limit of the existing size of the device, ie feet, j-reduced to the extent to which the theoretical analysis of the original (such as Ohm's law, etc.) will not then apply the other hand, the newly discovered phenomenon of quantum devices for the production of new offers a wealth of ideas,[link widoczny dla zalogowanych], may become the next generation of smaller-scale integrated circuit basis. Mesoscopic physics involving quantum mechanics and the macroscopic physical system 42ScienceendTechnologyReview7/3.994 juice some basic issues. Many ways remains to be elucidated. If the interaction between carriers in the impact; carrying on and light waves, sound waves, the interaction of spin waves; mesoscopic system, magnetic, optical properties, thermal properties such as the further development of the theory of mesoscopic systems Preparation of mesoscopic treatment system technology also involves a series of physical and chemical problems solidified. In China, mesoscopic physics studies have included climbing the national basic research program and the National Natural Science Foundation. In the experimental study and theoretical exploration, encouraging results have been made, I believe our physicists will be able to make their own contribution to this field (Editor Sun Liming)