Model class implementing the Darwin theory of diffraction for SiGe layers. DarwinModelSiGe001 ( qz, qx = 0, qy = 0, ** kwargs ) ¶ Temperature used for the Debye model static poisson_ratio ( x ) ¶Ĭalculate the Poisson ratio of the alloy re = 2.8179403262e-05 ¶ class _theory. Inplane lattice parameter init_structurefactors ( temp = 300 ) ¶Ĭalculates the needed atomic structure factors Parameters : temp float, optional 1=relaxed, 0=pseudomorphic Returns : dperp float Served as a reference for the relaxation parameter. (onto which the present layer is strained to). Inplane lattice parameter of the material below the current layer Spacing (of the atomic planes!) from composition and relaxation Parameters : x floatĬhemical composition parameter apar float Width of the resolution function (deg) polarization AsĪlloy asub = 5.65325 ¶ eAs = As (33) ¶ eGa = Ga (31) ¶ eIn = In (49) ¶ classmethod get_dperp_apar ( x, apar, r = 1 ) ¶Ĭalculate inplane lattice parameter and the out of plane lattice plane The background added to the simulation resolution_width float, optional The primary beam intensity background float, optional Inplane momentum transfer (not implemented!) I0 float, optional Momentum transfer values for the calculation qx, qy float, optional Parameters which are needed to prepare the calculation of the model. Init_structurefactors() and _calc_mono() methods _init_ ( qz, qx = 0, qy = 0, ** kwargs ) ¶Ĭonstructor of the model class. To make the class functional the user needs to implement the Working models for particular material systems. This class is not fully functional and should be used to derive Model class inmplementing the basics of the Darwin theory for layers DarwinModel ( qz, qx = 0, qy = 0, ** kwargs ) ¶ Xrayutilities.simpack package ¶ Submodules ¶ _theory module ¶ class _theory.
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