Messages

76

General Questions and Answers / The iv curve calculation did not converge to the requested tolerance!

« on: April 26, 2015, 04:16 »

when i  set max_steps=250 and i alse get the Warning
################################################################################
#                                                                              #
# Warning: The calculation did not converge to the requested tolerance!        #
#                                                                              #
################################################################################

now what can i do ?and i also want to know the maximum of  max_steps can be set

77

Installation and License Questions / License

« on: April 9, 2015, 09:49 »

i have 2 masters in license(2014).and now i  install  a 13.8 ATK(demo,14days for free)  in my cluster.
However，the 13.8 automatically use one of  masters in license(2014)

how can i get the solution? Thank you!

78

General Questions and Answers / Re: effective mass

« on: March 18, 2015, 04:40 »

The effective mass is a bulk property, and not bias-dependent.

Thank you!

79

General Questions and Answers / Re: effective mass

« on: March 18, 2015, 04:06 »

Please have a look at these two tutorial dealing with effective mass:
Meta-GGA and 2D confined InAs
Effective mass of electrons in silicon

Thank you.and i want to know how to calculate the effective mass in device with different bias,calculating the conductance for different gate potentials.

80

General Questions and Answers / piezoelectric

« on: March 17, 2015, 13:02 »

how to calculate piezoelectric in ATK?
Thank you!

81

General Questions and Answers / effective mass

« on: March 17, 2015, 12:58 »

can i calculate  effective mass in my device?and how?what is the relationship between effective mass and conductivity?
Thank you !