Self_Consistent_Transport.m File Reference

Example to calculate transport through a graphene quantum dot using self-consistent potential. More...

Go to the source code of this file.

Functions
function	CalcSelfconsistentPotential ()
	Calculates the self-consistent potential. More...
function	CalcSelfConsistentTransport ()
	calculates the transport with self-consistent potential More...
function	CalcTransport ()
	calculates the non-interacting transport More...
function	CreatePlot ()
function	DensityCalc ()
	Calculates the density using the predefined graphene lattice framework (Ribbon class) More...
function	InterfaceModel (Interface_Region)
	Method to adjust the Hamiltonians of the interface regions. More...
function	Pot_Self_Consistent (CreateH, E, SelfConsistent)
	Create a potential from a self-consistent data, and removing unecessary sites from the scattering region. More...
function	Self_Consistent_Transport (filenum)
	Example to calculate transport through a graphene quantum dot using self-consistent potential. More...
function	setOutputDir ()
function	Square_leads (idx, E, varargin)
	Create square leads Hamiltonians with the same inputs and output as Transport_Interface.SurfaceGreenFunctionCalculator. More...
function	Transport (Energy, self_consistent)
	Calculates the conductance for a given energy for both self-consistent and non-interacting cases. More...

Detailed Description

Example to calculate transport through a graphene quantum dot using self-consistent potential.

Compare results to Fig.3 in 2014 Nanotechnology 25 465201. In these calculations we use a leads defined on a square lattice and do the self-consistent potential iterations only for .

Parameters

filenum

The identification number of the filenema for the exported data (default is 1).

Reference

S. Krompiewski, Nanotechnology 25 465201 (2014).

Available

EQuUs v4.9 or later

Expected result

Definition in file Self_Consistent_Transport.m.

Function Documentation

CalcSelfconsistentPotential()

function CalcSelfconsistentPotential

(

)

Calculates the self-consistent potential.

CalcSelfConsistentTransport()

function CalcSelfConsistentTransport

(

)

calculates the transport with self-consistent potential

CalcTransport()

function CalcTransport

(

)

calculates the non-interacting transport

CreatePlot()

function CreatePlot

(

)

DensityCalc()

function DensityCalc

(

)

Calculates the density using the predefined graphene lattice framework (Ribbon class)

Returns

[1] The calculated density data

[2] An instance of structure junction_sites describing the sites in the calculated density

InterfaceModel()

function InterfaceModel

(

Interface_Region

)

Method to adjust the Hamiltonians of the interface regions.

Parameters

Interface_Region

An instance of class #Interface_Region.

Pot_Self_Consistent()

function Pot_Self_Consistent	(	CreateH	,
		E	,
		SelfConsistent
	)

Create a potential from a self-consistent data, and removing unecessary sites from the scattering region.

Parameters

CreateH	An instance of class CreateHamiltonians storing the Hamiltonian.
E	The energy value
SelfConsistent	Logical value. Set true to calculate the self-consistent potential, or false otherwise

Self_Consistent_Transport()

function Self_Consistent_Transport

(

filenum

)

Example to calculate transport through a graphene quantum dot using self-consistent potential.

Compare results to Fig.3 in 2014 Nanotechnology 25 465201. In these calculations we use a leads defined on a square lattice and do the self-consistent potential iterations only for .

Parameters

filenum

The identification number of the filenema for the exported data (default is 1).

setOutputDir()

function setOutputDir

(

)

Square_leads()

function Square_leads	(	idx	,
		E	,
		varargin
	)

Create square leads Hamiltonians with the same inputs and output as Transport_Interface.SurfaceGreenFunctionCalculator.

Transport()

function Transport	(	Energy	,
		self_consistent
	)

Calculates the conductance for a given energy for both self-consistent and non-interacting cases.

Parameters

Energy	The enrgy value
self_consistent	Logical value. Set true to use the self-consistent potential, or false to do the non-interacting calculations.

Returns

Returns with the calculated conductance in units of .