The term Fermi point has two applications but refers to the same phenomena (special relativity): * Fermi point (Quantum Field Theory) * Fermi point (Nanotechnology) For both applications count that the symmetry between particles and anti-particles in weak interactions is violated:At this point the particle energy E = cp is zero.In nanotechnology this concept can be applied to electron behavior. An electron when as single particle is a Fermion obeying the Pauli exclusion principle.