solve function, getting error

    syms Kspp
    eqn = (((e1+e2*coth(Kspp*d))/Kspp)+i(conductivity/(w*e0)))==0;%dispersion equation for Transverse Magnetic SPP waves
    solx = solve(eqn,Kspp);

I want to solve this for Kspp, but I am getting an error. Can any one help?

Answer 1

[madhan ravi]

syms Kspp 
    h=6.6262*10^-34; %Planck constant
    ha=h/(2*pi); %Reduced Planck constant
    Kb=1.3806*10^-23; % Boltzmann constant
    c=3*10^8;
    Ef=0.2; %Fermi energy
    T=100;
    e0=8.85*10^-12;
    e1=4; %SiO2 dielectric
    e2=4; 
    conductivity=sinh(ha/Kb*T)/(cosh(Ef/Kb*T)+cosh(ha/Kb*T));    
eqn = (((e1+e2*coth(Kspp*d))/Kspp)+i*(conductivity/(w*e0)))==0;%dispersion equation for Transverse Magnetic SPP waves
    solx = solve(eqn,Kspp) %returns empty sym which means symbolic engine is not able to solve

[Alice Faisal]

Error in syms (line 216) assignin('caller', x, xsym);

Error in MIMO (line 12) syms Kspp

Still I am getting an error

[madhan ravi]

what are the datas ?

[Alice Faisal]

    h=6.6262*10^-34; %Planck constant
    ha=h/(2*pi); %Reduced Planck constant
    Kb=1.3806*10^-23; % Boltzmann constant
    c=3*10^8;
    Ef=0.2; %Fermi energy
    T=100;
    e0=8.85*10^-12;
    e1=4; %SiO2 dielectric
    e2=4; 
    conductivity=sinh(ha/Kb*T)/(cosh(Ef/Kb*T)+cosh(ha/Kb*T));

[Alice Faisal]

no other way to solve it? how can I solve for Kspp