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qcl:sweeping_variables
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qcl:sweeping_variables [2019/03/13 14:43] thomas.grange |
qcl:sweeping_variables [2020/06/09 13:12] (current) admin |
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| ====== Sweeping variables ====== | ====== Sweeping variables ====== | ||
| - | The nextnanomat graphical user interface allows to sweep any variable of the nextnano.QCL input file. Algebraic expressions are also supported. | + | The nextnanomat graphical user interface allows to sweep any variable of the nextnano.NEGF input file. Algebraic expressions are also supported. |
| - | The template feature of nextnanomat is documented here: [[http://www.nextnano.com/dokuwiki/doku.php?id=nnm:template |here]]. | ||
| First, the variable to be swept has to be declared in the input file: | First, the variable to be swept has to be declared in the input file: | ||
| Line 11: | Line 11: | ||
| <Constant> | <Constant> | ||
| <Name Comment="Correlation Length for interface roughness">$Lcorrel</Name> | <Name Comment="Correlation Length for interface roughness">$Lcorrel</Name> | ||
| - | <Value Unit="">5</Value> | + | <Value Unit="">5</Value> |
| - | <ListOfValues>2,3,5,7,10,15</ListOfValues><!--Optional flag. Read in by nextnanomat template-tab.--> | + | |
| </Constant> | </Constant> | ||
| </Variables> | </Variables> | ||
| </code> | </code> | ||
| + | |||
| + | Then in the template tab of nextnanomat, the defined variable can be sweep. More information about the template feature of nextnanomat is documented [[http://www.nextnano.com/dokuwiki/doku.php?id=nnm:template |here]]. | ||
| + | |||
| + | {{ :qcl:template.png?direct&1000 |}} | ||
| + | |||
| + | === Algebraic expressions === | ||
| + | Calculations are also supported as a function of a sweeping variable, using the following syntax: | ||
| + | <code> | ||
| + | <Variables> <!--Declaration of variables used in the Input-file.--> | ||
| + | <Constant> | ||
| + | <Name Comment="Scaling factor.">$x</Name> | ||
| + | <Value Unit="">1</Value> | ||
| + | </Constant> | ||
| + | </Variables> | ||
| + | ... | ||
| + | | ||
| + | <Superlattice> | ||
| + | <Layer> | ||
| + | <Material>barrier</Material> | ||
| + | <Thickness unit="nm">$(x*4.1)</Thickness> | ||
| + | </Layer> | ||
| + | |||
| + | <Layer> | ||
| + | <Material>well</Material> | ||
| + | <Thickness unit="nm">$(x*16.0)</Thickness> | ||
| + | </Layer> | ||
| + | |||
| + | <Layer> | ||
| + | <Material>barrier</Material> | ||
| + | <Thickness unit="nm">$(x*4.3)</Thickness> | ||
| + | </Layer> | ||
| + | |||
| + | <Layer> | ||
| + | <Material>well</Material> | ||
| + | <Thickness unit="nm">$(x*8.9)</Thickness> | ||
| + | </Layer> | ||
| + | |||
| + | <Layer> | ||
| + | <Material>barrier</Material> | ||
| + | <Thickness unit="nm">$(x*2.46)</Thickness> | ||
| + | </Layer> | ||
| + | |||
| + | <Layer> | ||
| + | <Material>well</Material> | ||
| + | <Thickness unit="nm">$(x*8.15)</Thickness> | ||
| + | </Layer> | ||
| + | ... | ||
| + | </code> | ||
| + | For example, above all the layers of the structure are scaled with the same factor. | ||
| + | |||
| + | More complicated functions can be used, such as for a example: | ||
| + | <code> | ||
| + | <Layer> | ||
| + | <Material>barrier</Material> | ||
| + | <Thickness unit="nm">$(4.1*exp(-(x-1)^2/sigma^2))</Thickness> | ||
| + | </Layer> | ||
| + | </code> | ||
| + | |||
| + | The syntax of all possible expressions can be found on [[http://mathparser.org/mXparser]]. | ||
| + | |||
qcl/sweeping_variables.1552488213.txt.gz · Last modified: 2019/03/13 14:43 by thomas.grange
