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Sc_Niobium.m
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Sc_Niobium.m
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classdef Sc_Niobium < Superconductor
%Sc_Niobium
%
properties (Constant)
%Nb resonator parameters
N0 = 2.84*3.17E22 / Constants.eV / (Constants.centi * Constants.Meters)^3;
% 2.84 * 31.7E21 states eV^-1 cm^-3, from Kaplan
% Kaplan N0 must be multiplied by Z_1(0)
Nion = 5.57E10 / (Constants.micro * Constants.Meters)^3;
% 5.57E10 atoms um^-3, from Kaplan & Zehnder
%Number of phonon branches
nphonon = 3;
%Debye temperature
theta_D = 275 * Constants.Kelvin; % 275 K, Kaplan
%Quasiparticle characteristic lifetime
tau_0 = 0.149 * Constants.nano * Constants.Seconds; % 0.149 ns, from Kaplan
%Phonon characteristic lifetime
%tau_0_phonon = 4.17E-3; % 4.17 ps, from Kaplan
%Zero-Temperature energy gap
Delta_0 = 1470 * Constants.micro * Constants.eV; % 1.47 meV, from Zehnder
%Fermi energy
EFermi = 6.18 * Constants.eV;
%from Kozorezov 2000
lambda = 1.84;
b = 4.0E-3 / (Constants.milli*Constants.eV)^2;
alphasq_avg = 4.6 * (Constants.milli*Constants.eV);
%Material name
material = 'Nb';
%Sigma
sigma = 3.83E15; %W m^-3 K^-1
end
properties
%Phonon characteristic lifetime
tau_0_phonon_exact = 4.17 * Constants.pico * Constants.Seconds;
end
end