Monte Carlo simulation of spin relaxation in core-shell nanowires of dilute magnetic semiconductors

2013 ◽  
Vol 13 (9) ◽  
pp. 1943-1947
Author(s):  
S. Sabiq Chishti ◽  
Bahniman Ghosh ◽  
Bhupesh Bishnoi
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Spin Relaxation ◽  
Magnetic Semiconductors ◽  
Dilute Magnetic Semiconductors ◽  
Core Shell ◽  
Shell Nanowires

EFFECT OF ELECTRIC FIELD, TEMPERATURE AND CORE DIMENSIONS IN III–V COMPOUND CORE–SHELL NANOWIRES

NANO ◽  
2014 ◽  
Vol 09 (04) ◽  
pp. 1450051
Author(s):  
ASHWANI VERMA ◽  
BAHNIMAN GHOSH ◽  
AKSHAY KUMAR SALIMATH
Keyword(s):  
Monte Carlo ◽  
Electric Field ◽  
Spin Relaxation ◽  
Compound Semiconductor ◽  
Core Shell ◽  
Relaxation Length ◽  
The Core ◽  
Field Temperature ◽  
Simulation Results ◽  
Shell Nanowires

In this paper, we have used semiclassical Monte Carlo method to show the dependence of spin relaxation length in III–V compound semiconductor core–shell nanowires on different parameters such as lateral electric field, temperature and core dimensions. We have reported the simulation results for electric field in the range of 0.5–10 kV/cm, temperature in the range of 77–300 K and core length ranging from 2 nm to 8 nm. The spin relaxation mechanisms used in III–V compound semiconductor core–shell nanowire are D'yakonov–Perel (DP) relaxation and Elliott–Yafet (EY) relaxation. Depending upon the choice of materials for core and shell, nanowire forms two types of band structures. We have used InSb – GaSb core–shell nanowire and InSb – GaAs core–shell nanowire and nanowire formed by swapping the core and shell materials to show all the results.

Spin Transport in Core–Shell Nanowires of Dilute Magnetic Semiconductors

2014 ◽  
Vol 9 (1) ◽  
pp. 44-49
Author(s):  
S. Sabiq Chishti ◽  
Bahniman Ghosh ◽  
Ashwani Verma ◽  
Akshay Kumar Salimath
Keyword(s):  
Spin Transport ◽  
Magnetic Semiconductors ◽  
Dilute Magnetic Semiconductors ◽  
Core Shell ◽  
Shell Nanowires

scholarly journals MONTE CARLO SIMULATION OF SPIN RELAXATION IN NANOWIRES AND 2-D CHANNELS OF II–VI SEMICONDUCTORS

SPIN ◽  
2012 ◽  
Vol 02 (02) ◽  
pp. 1250007 ◽  
Author(s):  
ASHUTOSH SHARMA ◽  
SWETALI NIMJE ◽  
AKSHAYKUMAR SALIMATH ◽  
BAHNIMAN GHOSH
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
External Field ◽  
Spin Relaxation ◽  
Simulation Method ◽  
Relaxation Length ◽  
Factors Affecting ◽  
Spin Dephasing ◽  
Spin Polarized ◽  
The Many

We have analyzed spin relaxation behavior of various II–VI semiconductors for nanowire structure and 2-D channel by simulating spin polarized transport through a semiclassical approach. Monte Carlo simulation method has been applied to simulate our model. D'yakonov–Perel mechanism and Elliot–Yafet mechanism are dominant for spin relaxation in II–VI semiconductors. Variation in spin relaxation length with external field has been analyzed and comparison is drawn between nanowire and 2-D channels. Spin relaxation lengths of various II–VI semiconductors are compared at an external field of 1 kV/cm to understand the predominant factors affecting spin dephasing in them. Among the many results obtained, most noticeable one is that spin relaxation length in nanowires is many times greater than that in 2-D channel.

Magnetic Properties of the Cylindrical Ising Nanowire: A Monte Carlo Simulation Study

SPIN ◽  
2017 ◽  
Vol 07 (04) ◽  
pp. 1750011 ◽  
Author(s):  
A. Jabar ◽  
R. Masrour ◽  
M. Hamedoun ◽  
A. Benyoussef
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Magnetic Properties ◽  
Crystal Field ◽  
Remanent Magnetization ◽  
Hysteresis Loops ◽  
Core Shell ◽  
Monte Carlo Simulation Study ◽  
The Core ◽  
Magnetic Nanowire

A cylindrical ferrimagnetic magnetic nanowire system of core and shell layers has been investigated using Monte Carlo simulation. Critical temperature is obtained for different values of exchange couplings at the core–shell interface, at shell–shell and core–core. The total magnetization has been the determinate for different values of crystal field. Hysteresis loop, coercive field and remanent magnetization of a core and shell layers are obtained using the Monte Carlo simulation. A number of characteristic behaviors are found, such as the occurrence of single and triple hysteresis loops for appropriate values of crystal field, temperatures values and exchange interaction values.

Surface faceting and compositional evolution of Pd@Au core–shell nanocrystals during in situ annealing

2019 ◽  
Vol 21 (6) ◽  
pp. 3134-3139 ◽  
Author(s):  
Zhemin Wu ◽  
Min Tang ◽  
Xiaoyan Li ◽  
Sai Luo ◽  
Wentao Yuan ◽  
...  
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Transformation Process ◽  
Au Nanoparticle ◽  
Core Shell ◽  
Compositional Evolution

A step-wise transformation process of a Pd@Au nanoparticle both structurally and compositionally was observed. Monte Carlo simulation was used to explain the results.

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