Messages

1

General Questions and Answers / is there anyway to change the font of fat bandstructure to Times New Roman

« on: October 13, 2020, 09:37 »

i recently encountered a problem with atk-2019-12-sp1. I want to change the font of the horizontal and vertical axis labels of the fat bandstructure to Times New Roman,  how to deal with it? because a lot of journal needs that font.
thanks

 

2

General Questions and Answers / how to calculate the device of density of states after finishing ivcharactist

« on: February 2, 2020, 12:26 »

Dear Supporter:
i have finished IV  characteristics calculation, and now I want to calculate the device of density if states Vds AV at BV Vgs,   
but when i used Analysis from file ---->select the iv characteristic hdf5 file, and shows below, there is no option let me select the specific Vds at Vgs .
so i am wondering how to continue to calculation the Device density of states based on already ready iv characteristic hdf5 file.
thanks very much if you could give me some hints.

3

General Questions and Answers / how to reset some parameters after ivcurve calculation not convergence

« on: September 11, 2019, 15:02 »

Hi, I know if at some bias point for example at 0.4v,  the calculation did not convergence, I can try some setting such as   damping_factor.
i don how to write the script to reset these parameters.where to add the resetting parameter?
i read a convergence zero bias hdf5 file as a start point

path = './test-t-relax.hdf5'
configuration = nlread(path, object_id='DeviceConfiguration_0')[0]

# -------------------------------------------------------------
# IV Curve
# -------------------------------------------------------------
biases = [0.000000, 0.100000, 0.200000, 0.300000, 0.400000, 0.500000,
          0.600000, 0.700000, 0.800000, 0.900000, 1.000000, 1.100000,
          1.200000]*Volt

kpoint_grid = MonkhorstPackGrid()

iv_curve = IVCurve(
    configuration=configuration,
    biases=biases,
    energies=numpy.linspace(-3,3,301)*eV,
    kpoints=kpoint_grid,
    self_energy_calculator=RecursionSelfEnergy(),
    energy_zero_parameter=AverageFermiLevel,
    infinitesimal=1e-06*eV,
    selfconsistent_configurations_filename_prefix="ivcurve_selfconsistent_configuration_",
    log_filename_prefix="ivcurve_"
    )
nlsave('iv-t.hdf5', iv_curve)

4

General Questions and Answers / Re: A license error

« on: April 22, 2019, 09:40 »

sometime， mylicence server has been dead, my current os is centos7.6

5

General Questions and Answers / how to use ParallelDevicePerformanceProfile

« on: March 22, 2019, 11:05 »

Hi supporter:
in the webinar, there is an introduction about ParallelDevicePerformanceProfile , but I do not know how to use it.
because I have not found the option in the vnl, it is done by writing scripts manually?

6

General Questions and Answers / Re: the py script of atk-2018.06 version can be run by 2019-03 version

« on: March 18, 2019, 11:36 »

thank you for your reply.
i got it

7

General Questions and Answers / why those add-on-plugin disappear in the lastes 2019-03 version

« on: March 18, 2019, 08:35 »

Hi :
i found the add-on plugin is smaller than 2018-06 version.such as twist tool in coordinates tools?
 it is needed for me to build cells.
please add them in the newest version 2019.

thanks very much.

8

General Questions and Answers / the py script of atk-2018.06 version can be run by 2019-03 version

« on: March 16, 2019, 15:40 »

Hi
i have a py input file generated by 2018.06 version, and I am wondering it can be run by latest 2019-03 version?

9

General Questions and Answers / in my working flow, the iv calculation is for unrelax or relaxed configuration

« on: March 14, 2019, 12:34 »

Hi :
i have put configuration relaxation calculation together with iv calculation see figure. i am wondering the iv calculation is for unrelaxed configuration or relaxed configuration?

10

General Questions and Answers / Re: some gate-source point did not convergence in IV characteristic

« on: February 28, 2019, 04:23 »

thank you. now i am trying to do according to the manual.

11

General Questions and Answers / how to make the PLDOD more smooth?

« on: February 28, 2019, 04:22 »

Hi all:
i plot PLDOS of a pn junction and found the PLDOS is not smooth at some region,  it is unphysical, because the smoothless region in fact is the same with the smoothy region in the channel. 

so i want to make it more smoothy like <<effective first-principles calculation of phonon-assisted photocurrent in large-scale solar cell device>> Figure 1.

i am wondering how to set parameters? more E-dos and K in PLODS option?

12

General Questions and Answers / how to use less memory but performance did not change much

« on: February 27, 2019, 14:21 »

Dear all:
i have 20 cores and 64g memory in a node. current I have a FET device and want to calculate iv curve.
and i tested the usage memory and found it needs 8gb/core.
so my question is i want to use as many as possible cores to speed up calculation，i.e ~20 cores,
but according to the estimation of memory, i have to reduce cores to 7~8 cores..
so is there any solution to set parameters to use less memory per core, so that i can use more cores in my node.

thank you very much

13

Installation and License Questions / Re: any one has the same err while connect to license server？

« on: February 27, 2019, 14:02 »

The synopsys ATK license server is installed in centos7 system.

Code

  # cat /etc/redhat-release 
CentOS Linux release 7.6.1810 (Core) 

We can cennect to the license server in this centos7 system, and run atkpython fine.


However can not cennet to this license server in other computers. unless we stop the firewall in centos7 license server:

Code

  # systemctl stop firewalld.service 

That means that we can not solve this problem by add a port in firewall:

Code

# firewall-cmd --add-port=27020/tcp --permanent
# firewall-cmd --reload
# firewall-cmd --list-ports
27020/tcp

anyway to start the firewall and use the licenses server at the same time?

yes,i have the same problem

14

General Questions and Answers / some gate-source point did not convergence in IV characteristic

« on: February 27, 2019, 08:31 »

Dear ALL:
there are two points in gate-source plot did not convergence. see the following figure.
 so i am wondering  how to recalculate the two convergenced points?
and then merge the other convergence points together once again
 to get  the on/off ration and other physical values?
 

15

General Questions and Answers / the gate cover the electrode region?

« on: February 23, 2019, 05:35 »

Hi;

i set the dielectric region over the electrode repetition in the scattering region, but you see in the figure following,  above the true electrode, the VNL did not copy the dielectric  region.
so iam wondering how the ATK treat the gate region, in my situation?
the dielectric region has a direct effect on the true electrode  ?

PS： the 2018-6-version, it seems we are allowed to add a gate on true electrode。