Browsing by Author "Prabhakar, S."
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Abinitio calculations of strain induced relaxed shape armchair graphene nanoribbon
Prabhakar, S.; Melnik, R. (2019)An odd number of zigzag edges in armchair graphene nanoribbons and their mechanical properties (e.g., Young's modulus, Poisson ratio and shear modulus) have potential interest for bandgap engineering in graphene based ... 
Band structures of cylindrical AlN/GaN quantum dots with fully coupled piezoelectric models
Prabhakar, S.; Melnik, R. (20101231)We study the coupled electromechanical effects in the band structure calculations of low dimensional semiconductor nanostructures (LDSNs) such as AlN/GaN quantum dots. Some effects in these systems are essentially nonlinear. ... 
Band structures of laterally coupled quantum dots, accounting for electromechanical effects
Prabhakar, S.; Melnik, R.; Patil, S. (20101231)In a series of recent papers we demonstrated that coupled electromechanical effects can lead to pronounced contributions in band structure calculations of low dimensional semiconductor nanostructures (LDSNs) such as quantum ... 
Berry phase and spin precession without magnetic fields in semiconductor quantum dots
Prabhakar, S.; Melnik, R. (2019)We investigate electric field control of spin manipulation through Berry phase in IIIV semiconductor quantum dots. By utilizing degenerate and nondegenerate perturbation theories, we diagonalize the total Hamiltonian of ... 
Coupled magnetothermoelectromechanical effects and electronic properties of quantum dots
Prabhakar, S.; Melnik, R.; Neittaanmäki, P.; Tiihonen, T. (20131231)For the first time, we systemically analyze the influence of magnetothermoelectromechanical effects on the band structure calculations by using the fully coupled model. We focus on three different types of quantum dots ... 
Influence of electromechanical effects and wetting layers on band structures of AlN/GaN quantum dots and spin control
Prabhakar, S.; Melnik, R. (20101231)In a series of recent papers we demonstrated that coupled electromechanical effects can lead to pronounced contributions in band structure calculations of low dimensional semiconductor nanostructures (LDSNs) such as quantum ... 
Manipulation of single electron spin in a GaAs quantum dot through the application of geometric phases: The Feynman disentangling technique
Prabhakar, S.; Raynolds, J.; Inomata, A.; Melnik, R. (20101231)The spin of a single electron in an electrically defined quantum dot in a twodimensional electron gas can be manipulated by moving the quantum dot adiabatically in a closed loop in the twodimensional plane under the ... 
Pseudospin lifetime in relaxedshape armchair graphene nanoribbons due to inplane phonon modes
Prabhakar, S.; Melnik, R.; Bonilla, L. (20160101)We study the influence of ripple waves on the band structures of strained armchair graphene nanoribbons. We argue that the Zeeman pseudospin (pspin) splitting energy induced by ripple waves might not be neglected for ... 
Tuning $g$factor of electrons through spinorbit coupling in GaAs/AlGaAs conical quantum dots
Prabhakar, S.; Melnik, R. (20160101)We investigate band structures of (Formula presented.) threedimensional conical quantum dots (QDs). In particular, we explore the influence of the Rashba and Dresselhaus spinâ€“orbit couplings in the variation of effective ... 
Valleydependent Lorentz force and AharonovBohm phase in strained graphene pn junction
Prabhakar, S.; Nepal, R.; Melnik, R.; Kovalev, A.A. (2019)Veselago lens focusing in graphene pn junction is promising for realizations of new generation electron optics devices. However, the effect of the straininduced AharonovBohm interference in a pn junction has not been ...