Fractional shot noise of an SU(N) Kondo system

• Damian Krychowski and
• Stanisław Lipiński

Beilstein J. Nanotechnol. 2026, 17, 515–540, doi:10.3762/bjnano.17.34

• described by the Keldysh vertex corrections. Oguri and colleagues [82] calculated the vertex functions up to the linear order with respect to the bias voltage V, the temperature T, and the energy E. The Keldysh Green’s functions were expanded up to terms of order V2, T2, and E2. Fermi liquid coefficients

• contribute to elastic scattering, and they give the mean-field energy shift of the Kondo resonance. A full account of the consequences of on the conductance and shot noise requires the use of the Keldysh formalism. Collision terms of two quasiparticles are microscopically described by the Keldysh vertex

• corrections. The Keldysh Green’s functions are expanded up to the terms of order (eV)3 to include multiple collision processes contributing to the noise; the vertex function has to be determined up to linear order. Leaving all the details, we write, according to [82], the final expressions (Equation 22 and

Nonadiabatic superconductivity in a Li-intercalated hexagonal boron nitride bilayer

• Kamila A. Szewczyk,
• Izabela A. Domagalska,
• Artur P. Durajski and
• Radosław Szczęśniak

Beilstein J. Nanotechnol. 2020, 11, 1178–1189, doi:10.3762/bjnano.11.102

• Zielona Góra, Prof. Z. Szafrana 4a, 65-516 Zielona Góra, Poland Division of Physics, Częstochowa University of Technology, Ave. Armii Krajowej 19, 42-200 Częstochowa, Poland 10.3762/bjnano.11.102 Abstract When considering a Li-intercalated hexagonal boron nitride bilayer (Li-hBN), the vertex corrections

• of TC limits the possible applications of Li-hBN. The calculations were carried out under the classic Migdal–Eliashberg formalism (ME) and the Eliashberg theory with lowest-order vertex corrections (LOVC). We show that the vertex corrections of higher order (λ3) lower the value of TLOVCC by a few

• percent. Keywords: critical temperature; electron–phonon interaction; Li-hBN bilayer; Li-intercalated hexagonal boron nitride (Li-hBN); nonadiabatic superconductivity; vertex corrections; Introduction Low-dimensional systems such as graphene [1][2][3][4][5], silicene [6], borophene [7][8], and