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Kitakorn Jatiyanon. Quantum transport properties in bilayer silicene. Doctoral Degree(Physics). Kasetsart University. Office of the University Library. : Kasetsart University, 2019.
Quantum transport properties in bilayer silicene
Name: Kitakorn Jatiyanon
Classification :.LCCS: TA418.9.N35
LCSH:
Nanosilicon
LCSH:
Silicon
LCSH:
Layer structure (Solids)
Abstract:
stacked bilayer silicene is considered in the calculation of electron transport under the ballistic regime. In the considered system, the out-of-plane electric field, staggered exchange energy from ferromagnetic insulators and circularly-polarized light are applied into the barrier. As silicene is one of the topological material candidates, topological phases are anticipated to take place in the bilayer silicene system. By calculating spin-valley Chern number, it is found that in the junctions, Chern number in bilayer silicene is twice as much as that in monolayer silicene. Topological phase transitions can also be tuned by changing the gap induced by the electric filed, the exchange energy and the polarized light. Moreover, by adopting the standard Landauer formalism to calculate conductance in the x direction, it is found that at a transition point between topological phases, there is only single spin-valley electron allowed to flow, obeying the zero-Chern number condition. This shows the presence of perfect spin-valley filter behavior controlled by the phase transition. Perfect switching of pseudospin, spin and valley polarizations from -100% to 100% is also predicted. This result is different from that in a bilayer graphene system which has very small spin-orbit coupling. The perfect polarizations induced by topological phases transitions are applicable for spin-valleytronics devices.
Kasetsart University. Office of the University Library
Address:
Bangkok
Email:
tdckulib@ku.ac.th
Name: Bumned Soodchomshom
Role:
Thesis Advisor
Created:
2019
Modified:
2025-07-01
Issued:
2025-07-01
วิทยานิพนธ์/Thesis
application/pdf
URL: https://www.lib.ku.ac.th/KUthesis/2562/kitakorn-jat-all.pdf
CallNumber:
TA418.9.N35 .K58
eng
DegreeName: Doctor of Philosophy
Level: Doctoral Degree
Descipline: Physics
Grantor: Kasetsart University
©copyrights Kasetsart University
RightsAccess:
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0.037064 วินาที
Kitakorn Jatiyanon
| Title | Contributor | Type |
|---|---|---|
| Quantum transport properties in bilayer silicene
มหาวิทยาลัยเกษตรศาสตร์ Kitakorn Jatiyanon | Bumned Soodchomshom | วิทยานิพนธ์/Thesis |
Bumned Soodchomshom
| Title | Creator | Type and Date Create |
|---|---|---|
| Topological phase transition and quantum transport in honeycomb lattices
มหาวิทยาลัยเกษตรศาสตร์ Bumned Soodchomshom | Worasak Prarokijjak | วิทยานิพนธ์/Thesis |
| Quantum transport properties in bilayer silicene
มหาวิทยาลัยเกษตรศาสตร์ Bumned Soodchomshom | Kitakorn Jatiyanon | วิทยานิพนธ์/Thesis |
| Optical conductivities of 2-dimensional materials
มหาวิทยาลัยเกษตรศาสตร์ Bumned Soodchomshom | Phusit Nualpijit | วิทยานิพนธ์/Thesis |