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Messages - liximao

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1
Yes, I get it.
 

2
General Questions and Answers / Re: Can ATK calculate STM?
« on: October 30, 2013, 08:54 »
Thanks a lot!

3
General Questions and Answers / Can ATK calculate STM?
« on: October 14, 2013, 06:28 »
Dear All,
   Hello!
   I want to know whether the atk can calculate STM (Scanning tunneling microscopy) image or not?
  Thanks!



4
The module is fix at the attachments.

5
I have calculated the same module with gate voltage 0V or without gate using atk12.8.2, meanwhile the air layer is 8A.
It uses MultigridSolver, under the same index, to calculate and get the TMR result of the magnetic tunnel junction is 15.66 and 13.20, respectively.

The shape, position, and the existence of the  gate voltage  has influences on models.
How to percieve software functions on the gate voltage  electric field and the results diversity?
Thanks !

6
First of all, thanks for your reply!
I understand what you mean.
But here, this node has 16 core, but only less than 8 core for each job was permitted in the lab. And we need  submit other vasp jobs on it. 
The internet manager and other students are disagree with that I use all the 16 core resource.
Can you understand it?
I think maybe I can do some setting to make the atk job occupy only 4 core. Can I do it?


7
Thanks!
Then, how to resolve it?


8
Dear All,
Hello!
I finish the installation of atk 12.8 with a floating license.
The parallel test with test_mpi is normal when submit it with mpich2. It show 3 slave and 1 master when 4 cpu is occupied.
But there is still a problem there: it will  occupy more than 100% cpu.
You can see that as  list below that there are four atkpython processes , but it will occupy all the cpu of this node when I submit 1 atk job with four  cpu.
 
 [root@hn test]# /share/appr/mpich2-1.5/bin/mpiexec -n 4 atkpython zigzag.py > 3.out&
[root@hn test]# top
top - 17:31:15 up 32 days,  7:03,  3 users,  load average: 0.88, 3.29, 3.59
Tasks: 617 total,   5 running, 612 sleeping,   0 stopped,   0 zombie
Cpu0  : 89.4%us,  9.3%sy,  0.0%ni,  1.3%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Cpu1  : 89.8%us,  9.3%sy,  0.0%ni,  0.8%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Cpu2  : 84.9%us,  8.4%sy,  0.0%ni,  6.7%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Cpu3  : 79.2%us, 10.6%sy,  0.0%ni, 10.2%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Cpu4  : 84.2%us, 10.3%sy,  0.0%ni,  5.6%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Cpu5  : 83.5%us, 10.7%sy,  0.0%ni,  5.8%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Cpu6  : 86.9%us,  8.5%sy,  0.0%ni,  4.7%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Cpu7  : 76.9%us, 10.3%sy,  0.0%ni, 12.8%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Cpu8  : 85.5%us, 11.5%sy,  0.0%ni,  3.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Cpu9  : 85.5%us, 11.5%sy,  0.0%ni,  3.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Cpu10 : 89.8%us,  9.3%sy,  0.0%ni,  0.8%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Cpu11 : 86.1%us, 10.9%sy,  0.0%ni,  2.9%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Cpu12 : 89.4%us, 10.6%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Cpu13 : 83.1%us, 11.4%sy,  0.0%ni,  5.5%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Cpu14 : 85.0%us, 10.7%sy,  0.0%ni,  4.3%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Cpu15 : 81.4%us, 10.1%sy,  0.0%ni,  8.4%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Mem:  65944340k total, 62385596k used,  3558744k free,   423196k buffers
Swap: 131071992k total,        0k used, 131071992k free, 56208136k cached
  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
22376 root      20   0 1565m 224m  20m R 582.4 0.3   0:31.53 atkpython_exec
22375 root      20   0 1564m 212m  20m R 482.8  0.3   0:27.39 atkpython_exec
22374 root      20   0 1567m 197m  21m R 231.7  0.3   0:16.42 atkpython_exec
22377 root      20   0 1565m 198m  20m R 213.6  0.3   0:19.59 atkpython_exec
18990 liuwei    20   0 1020m 4944 1784 S  0.8  0.0   0:38.83 lmx-serv
 4466 root      20   0  266m  19m 4536 S  0.4  0.0   1:20.49 gnome-screensav
22364 root      20   0 25516 1436 1176 S  0.4  0.0   0:00.01 mpiexec
22378 root      20   0 15484 1688  964 R  0.4  0.0   0:00.26 top
    1 root      20   0 19396 1564 1256 S  0.0  0.0   0:01.97 init
    2 root      20   0     0    0    0 S  0.0  0.0   0:00.01 kthreadd

Please give me some suggestions, thanks a lot!
 ;D


9
Thanks a lot!
I will try it.

10
Hello!
I download the atk12.2.0 and finish the installation successfully.
But I find that there is no lmx-serv-quantum file in atk12.2.0/license directory.
How to run the ./lmx-serv-quantum -b -l license.lic -lf  lmxserver.log command?
How to deal with it?
Thanks!

12
Thanks!  ;D
1. How about the graphene?
2. How about the Ag double electrode device with a small molecule?

13
I want to know how long I can save when I calculate one 800-atom system by ATK 10.8 with 8 cores instead of 4 cores.
40% or 50% or others?  ???
Thanks!   :D

14
Thanks for your reply!

15
Can I calculate the properties under 0.00001 V?
I want to know the minimum between left electrode voltage and right electrode voltage, thanks!

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