Goldstone Mode in Charged Superconductivity:Theoretical Studies of the Carlson-Goldman Mode and Effects of the Landau Damping in the Superconductiong State

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概要

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• We investigate the collective phase oscillations in stujcerconductivity, i.e., the Carlson-Goldrnanzmode in tlae charged systern and the phason in tJae neutral, f'octrsing on their velocities andhow they appear in the strtmcttrre f'trnction of the plaase fItmctu?ttion of tlue order pararaaeter. Ourumicroscopic tlueory can cover frona the clean to the dirty system, artd f'trrtherrnore it C2111 tre?ttthe Landatt danuping correctly. Based on otrr forunvxlation, we obtain followin'ng restults: (l) Thevelocity of the phason is proportional to (T0- T)"' (T<, Tcz ) in the clean systetn, though it hasbeen believed as ('Z'c - 'Z')"' (Tc: supercondtrctiuag transitioua ternperature). (2) The strttctturefunctioua has a central peak which grows 218 T + Tc. This plxenoraaenon is related to tlae centralpeak problem in the field of tlae strttctttral phase trarxsition. (3) The Carlson-Goldman naode canbe observed by a ttrnnelirtg experiratent in case of the dirty systenra, ',vhile not it'r the clean. It isin contrast to the previotts prediction. All of these results are f'otrnd to be deeply relanted to thepresence of the Landatr danaping as well as the screening effect, both of which ar'e caused Joy thequasi-particles excited therrnally.

• 社団法人日本物理学会の論文
• 1997-08-15

著者

• TAKADA Satoshi

  Institute of Physics,University of Tsukuba

• Ohashi Yoji

  Institute Of Physics University Of Tsukuba

• Takada Satoshi

  Institute For Solid States Physics University Of Tokyo : Department Of Physics College Of General Education University Of Tokyo

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