 Here, formula_21 is the distance between the centers of two current loops, formula_22 is the magnitude of the electron charge, formula_23 is the quantum version of the Larmor radius, and formula_24 is the thickness of the electron gas in the direction of the magnetic field.The angular momenta of the two individual current loops are formula_25 and formula_26 where formula_27.The inverse screening length is given by (Gaussian units)

where formula_29 is the cyclotron frequency, and formula_30 is the area of the electron gas in the xy plane.