Sweep file format

Temperature sweep files are concatenations of fit records as described above for a temperature range. These allow rapid temperature modeling through interpolation in supporting simulators (WRspice and Synopsys HSPICE). Sweep files are created with the cs command.

Below is an example temperature sweep file.

tsweep 91 0.1000 0.1000 0.008 500 8 0.200
tcafit  1.0000e-01  1.4086e-03  1.4086e-03  1.3185e-02
-8.51331e+00, 1.15164e-01, 1.29900e+00, 1.11105e+01,-4.05570e-01, 5.65607e+01
-1.06700e-02, 1.00009e+00, 3.58651e-03,-2.25268e-04, 3.57013e-03,-5.66586e-05
-2.47980e-02, 1.00072e+00, 1.14692e-02,-5.49747e-04, 1.15840e-02,-1.07382e-04
-6.31470e-02, 1.00196e+00, 2.92347e-02,-1.70767e-03, 2.93324e-02, 2.09767e-03
-1.86179e+00, 9.23541e-01, 7.52628e-01,-8.71131e-02,-4.37397e-01, 2.11473e+00
-1.56178e-01, 1.00378e+00, 6.81933e-02,-6.76474e-03, 7.04144e-02, 1.46763e-02
-3.74403e-01, 1.01258e+00, 1.53951e-01,-3.71976e-02, 1.73747e-01, 7.86682e-02
-8.73847e-01, 1.06711e+00, 2.56553e-01,-1.53780e-01, 4.86150e-01, 3.82557e-01
tcafit  2.0000e-01  1.4086e-03  1.4086e-03  1.3185e-02
-8.51331e+00, 1.15164e-01, 1.29900e+00, 1.11105e+01,-4.05570e-01, 5.65607e+01
-1.06700e-02, 1.00009e+00, 3.58651e-03,-2.25268e-04, 3.57013e-03,-5.66586e-05
...

The first line is a file header starting with the word ``tsweep''. The numbers that follow on this line are:

• The number of fit records contained in this file (91).
• The lowest temperature K used for fit parameters in the file, this will be used in the first fit record (0.1000).
• The temperature delta K used in the sweep file (0.1000).
• The smoothing parameter, -s option, used to create all TCA tables (0.008).
• The number of scale points, -x option, used to create all TCA tables (500).
• The number of terms used for each fit table, -n option (8).
• The value of the threshold parameter used in each fit table (0.200).

Following this header, fit records are concatenated. These are similar to the format described above, the only difference is that the header line is simplified to omit redundant information. The fit record header contains the following value following the word ``tcafit''.

• The temperature in Kelvin (4.2000e+00).
• The left electrode pair-breaking energy in ev (1.3696e-03).
• The right electrode pair-breaking energy in ev (1.3696e-03).
• Normalized quasiparticle current at x=0.8, used to estimate the sub-gap conductance (3.9580e-2).