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Electric-field dependence of pairing temperature and tunneling in high-temperature superconductors

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Morawetz,  K.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Morawetz, K. (2002). Electric-field dependence of pairing temperature and tunneling in high-temperature superconductors. Physical Review B, 66(17): 172508. Retrieved from http://ojps.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRBMDO000066000017172508000001&idtype=cvips&gifs=yes.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002B-36A7-E
Abstract
Using the Bethe-Salpeter equation including high electric fields, the dependence of the critical temperature of onsetting superconductivity on the applied field is calculated analytically. The critical temperature of pairing is shown to increase with the applied field strength. This is a new field effect and could contribute to the explanation of recent experiments on field-induced superconductivity. From the field dependence of the Bethe-Salpeter equation, the two-particle bound-state solution is obtained as a resonance with a tunneling probability analogous to the WKB solution of a single particle confined in a potential and coupled to an electrical field.