First-order phase transition by a spin-flip potential in BCS superconductivity
Statistical Mechanics
2019-09-04 v1
Abstract
A spin-flip potential is introduced in a BCS Hamiltonian in order to study a possible thermodynamic effect that might be caused by the addition of a magnetic impurity in a superconductor. We found that the competition between the pairing and the spin-flip effect, caused by the interaction between the itinerant electrons and the spin of the impurity, gives rise to a first-order phase transition for certain values of . The phase diagram shows a tricritical point in a frontier line which is topologically similar to those found in the phase diagrams of some Ising-like models.
Cite
@article{arxiv.1801.07377,
title = {First-order phase transition by a spin-flip potential in BCS superconductivity},
author = {Octavio D. Rodriguez Salmon and Igor Tavares Padilha and Francisco Dinóla Neto},
journal= {arXiv preprint arXiv:1801.07377},
year = {2019}
}