How to plot this equation
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I'm trying to plot the figure below, but I don't really understand what function to use to achieve this.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1588206/image.png)
β is defined as
, where the T used is for low temperature
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1588211/image.png)
I tried using syms delta and fplot(@(delta) U) but that doesn't seem right.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1588216/image.png)
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Paul
am 11 Jan. 2024
syms U Delta beta T k_beta
U = -Delta/2*tanh(beta*Delta/2)
UoverDelta = U/Delta
UoverDelta = subs(UoverDelta,beta,inv(k_beta*T))
syms w
UoverDelta = subs(UoverDelta,k_beta*T/Delta,w)
figure
fplot(UoverDelta,[0 10])
ylim([-1 0])
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