QuantumATK Forum

QuantumATK => General Questions and Answers => Topic started by: kaypu on November 12, 2013, 02:44

Title: Does the phase of electron change in the coherence transport ?
Post by: kaypu on November 12, 2013, 02:44

Dear QuantumWise staff:
    Does the phase of electron change in the coherence transport ? 

Title: Re: Does the phase of electron change in the coherence transport ?
Post by: Anders Blom on November 16, 2013, 22:50

If there is any irregularity of the lattice in the central region, compared to the perfectly periodic bulk crystal of the electrodes, then yes, it changes. The conserved quantum numbers are energy, the momentum parallel to the interface, and spin (unless noncollinear spin is used), but since the kZ momentum is not, the total phase may change if there is any potential scattering in the central region.

Title: Re: Does the phase of electron change in the coherence transport ?
Post by: kaypu on November 19, 2013, 09:25

thank you professor Anders

Title: Re: Does the phase of electron change in the coherence transport ?
Post by: Dipankar Saha on November 19, 2013, 13:25

Sir,
even if, it is a perfect GNR (/sheet )...without any irregularity, defects...then also, plotting iso-values of the eigen-states are showing phase change in a repetitive fashion over the entire channel region of the honey-comb lattice (from, iso-surface color map, it can be found that, mostly they are showing  the phase change over the range of 0-180 degree).... /May, I know what is the reason behind this ??

Title: Re: Does the phase of electron change in the coherence transport ?
Post by: Anders Blom on November 20, 2013, 09:48

Of course the phase changes over the period for a complex, periodic function. The point of a perfect system is that the state is periodic.

Title: Re: Does the phase of electron change in the coherence transport ?
Post by: Dipankar Saha on November 20, 2013, 14:59

Dr. Anders Blom

Thank you so very much for this valuable reply.... :)

Title: Re: Does the phase of electron change in the coherence transport ?
Post by: Dipankar Saha on November 23, 2013, 04:54

Dr. Anders Blom
Can you please provide any link, or material (apart from that "Transmission Analyzer in ATK 13.8" video....)...from where I can get a better insight in to this topic ?? It will be very much helpful then.... :)