登入選單
返回Google圖書搜尋
其他書名
How the Electrostatic Field Helps to Understand Superconductivity
出版Springer, 2007-09-28
主題Technology & Engineering / Electronics / GeneralTechnology & Engineering / Materials Science / Electronic MaterialsScience / Physics / Condensed MatterTechnology & Engineering / GeneralTechnology & Engineering / ElectricalScience / Physics / GeneralTechnology & Engineering / Engineering (General)
ISBN35407345629783540734567
URLhttp://books.google.com.hk/books?id=rUHj2W0GhUsC&hl=&source=gbs_api
EBookSAMPLE
註釋There are many monographs and textbooks addressing superconductivity from di?erent angles. In spite of a large variety of explored approaches, one problem is always left aside. It is the balance of forces acting on the sup- conducting condensate. In the present book this question is central. As the title suggests, there is a close analogy between the electrostatic ?eld in superconductors and the pressure in the ideal incompressible liquid. As one can easily imagine looking at swirling water, molecules of the inc- pressible liquid are accelerated by gradients of the pressure so that they can follow complicated trajectories often changing their directions and velocities. Electronsinthe superconductorbehavesimilarly,exceptthatthe electrostatic potential plays the role of the pressure. The pressure in any material develops when we reduce its volume. This leads us to the main puzzle. By de?nition, the incompressible liquid never changes its volume. Consequently, how can be any pressure there? Of course, one has the direct experience that there is a pressure in water and one would never deny it. The incompressible liquid is an ideal model which assumes that the pressure we feel has been achieved with a negligibly small change of the volume.