1
General Questions and Answers / Re: Current or current density
« on: November 14, 2024, 08:26 »
Thank you for your reply.
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2
General Questions and Answers / Current or current density
« on: November 12, 2024, 16:24 »
Hello,
In Landauer–Buttiker formula for current dependent on temperature of electrodes of device, why current density is not used. Please let me know.
In Landauer–Buttiker formula for current dependent on temperature of electrodes of device, why current density is not used. Please let me know.
3
General Questions and Answers / Re: Compute Hall coefficient and Hall conductivity tensors
« on: November 5, 2024, 15:02 »
Hi,
Thank you for your reply.
Can I calculate the up-up, down-down, up-down, and down-up components of Hall coefficients?
Thank you for your reply.
Can I calculate the up-up, down-down, up-down, and down-up components of Hall coefficients?
4
General Questions and Answers / Heat capacity of spin-up and spin-down electrons
« on: October 23, 2024, 10:12 »
Hi everyone,
How to calculate heat capacity of spin-up and spin-down electrons for a device with metallic interface?
Thanks
How to calculate heat capacity of spin-up and spin-down electrons for a device with metallic interface?
Thanks
5
General Questions and Answers / Compute Hall coefficient and Hall conductivity tensors
« on: October 16, 2024, 09:07 »
Hello everyone,
Is there any tutorial available to compute Hall coefficient and Hall conductivity tensors?
Please let me know.
Thank you
Is there any tutorial available to compute Hall coefficient and Hall conductivity tensors?
Please let me know.
Thank you
6
General Questions and Answers / Re: Hall conductivity and Seebeck coefficient
« on: October 15, 2024, 16:26 »
Please let me know about this.
7
General Questions and Answers / Re: Information from transmission spectrum
« on: October 15, 2024, 08:38 »
Thank you.
8
General Questions and Answers / Hall conductivity and Seebeck coefficient
« on: October 14, 2024, 12:32 »
Hello everyone,
How to calculate Hall conductivity and Seebeck coefficient of a two probe device in Quantum ATK?
Thank you
How to calculate Hall conductivity and Seebeck coefficient of a two probe device in Quantum ATK?
Thank you
9
General Questions and Answers / Re: Information from transmission spectrum
« on: October 14, 2024, 12:31 »
Please let me know about this.
10
General Questions and Answers / Information from transmission spectrum
« on: October 8, 2024, 10:25 »
Hello,
What more information we can extract from spin polarized transmission curve apart from telling the contribution of up and down spin states using ATK?
Thank you
What more information we can extract from spin polarized transmission curve apart from telling the contribution of up and down spin states using ATK?
Thank you
11
General Questions and Answers / Re: Spin polarized temperature dependent current for two probe device
« on: August 8, 2024, 13:29 »
Hello,
Thank you for the reply. Yes, the structure is a heterostructure having same type of electrode on both the sides. For some temperature difference between left and right electrode,(let's say for TL= 300 K, 400 K) the current is flowing from hot to cold (positive current) while for some (let's say for TL= 500 K) it changes sign and flow from cold to hot (negative current). Could you please let me know how I explain this phenomena or suggest me some references. It is confusing me a lot.
Thank you
Thank you for the reply. Yes, the structure is a heterostructure having same type of electrode on both the sides. For some temperature difference between left and right electrode,(let's say for TL= 300 K, 400 K) the current is flowing from hot to cold (positive current) while for some (let's say for TL= 500 K) it changes sign and flow from cold to hot (negative current). Could you please let me know how I explain this phenomena or suggest me some references. It is confusing me a lot.
Thank you
12
General Questions and Answers / Re: Spin polarized temperature dependent current for two probe device
« on: August 5, 2024, 11:18 »
Hello,
The current should flow from high temperature to low temperature. How it is flowing in opposite direction? From where I can read more about it?
Thank you
The current should flow from high temperature to low temperature. How it is flowing in opposite direction? From where I can read more about it?
Thank you
13
General Questions and Answers / Setting parallel and antiparallel configuration in two probe device
« on: July 30, 2024, 18:08 »
Hello everyone,
What would be the spin of central region for setting parallel and antiparallel configuration for a two probe device geometry having a spin polarized central region? In case of Fe-MgO-Fe, the MgO spin was zero, but if the central region is spin polarized (lets say Fe or any 2d material) then what would be the spin on atoms for parallel and antiparallel case?
What would be the spin of central region for setting parallel and antiparallel configuration for a two probe device geometry having a spin polarized central region? In case of Fe-MgO-Fe, the MgO spin was zero, but if the central region is spin polarized (lets say Fe or any 2d material) then what would be the spin on atoms for parallel and antiparallel case?
14
General Questions and Answers / Direction of current with increase in electrode temperature
« on: July 25, 2024, 10:31 »
Hello,
For a two probe heterostructure device, the direction of current change from positive to negative with increase in left (or right) electrode temperature. What could be possible explanation?
Thank you
For a two probe heterostructure device, the direction of current change from positive to negative with increase in left (or right) electrode temperature. What could be possible explanation?
Thank you
15
General Questions and Answers / Spin polarized temperature dependent current for two probe device
« on: June 19, 2024, 11:48 »
Hi everyone,
While doing temperature dependent spin polarized current calculation, what is the direction of current if left electrode is at high temperature and right electrode is at low temperature. In some cases the up spin is in negative in sign and lower in magnitude than down spin, what could be possible explanation? Also, is it possible that total current (up spin+down spin) flow from cold electrode to hot electrode?
Thank you
While doing temperature dependent spin polarized current calculation, what is the direction of current if left electrode is at high temperature and right electrode is at low temperature. In some cases the up spin is in negative in sign and lower in magnitude than down spin, what could be possible explanation? Also, is it possible that total current (up spin+down spin) flow from cold electrode to hot electrode?
Thank you