Carbon nanotube spectrum

Calculates carbon nanotube spectrum and excitation spectrum using the Hamiltonian in equation (25) in

E. Laird et al., Reviews of Modern Physics, 87, 703 (2015)

All energy values are in milli-electronvolts.

Example

This piece of code from simple_example.py

from cntspectrum import cntSpectrum
import numpy as np
import matplotlib.pyplot as plt
model_kw = {
    'deltaSO': 0.15,
    'deltaKK': 0.07,
    'mu_orb': 0.15,
    'J': 0.12,
}
model = cntSpectrum(**model_kw)
B_fields = 2
B_angles = np.linspace(0, np.pi, 46)
spectrums = model.get_spectrums(B_fields, B_angles, two_electron=False)
fig, ax = plt.subplots()
ax.plot(B_angles, spectrums.squeeze())
ax.set_xlabel('Magnetic field angle (radians)')
ax.set_ylabel('Energy (meV)')
plt.show()

yields the figure

Citation

1. E. Laird et al., Reviews of Modern Physics, 87, 703 (2015)
2. D. H. Douglass, Phys Rev Lett, 6, 7 (1961)

Help

Type help(cntSpectrum)

Credit and Copyright

Morten Canth Hels