Chirality dependence of dipole matrix element of carbon nanotubes in axial magnetic field: A third neighbor tight binding approach

2014 ◽  
Vol 313 ◽  
pp. 406-415 ◽  
Author(s):  
Raad Chegel ◽  
Somayeh Behzad
Keyword(s):  
Magnetic Field ◽  
Carbon Nanotubes ◽  
Matrix Element ◽  
Axial Magnetic Field ◽  
Tight Binding ◽  
Dipole Matrix Element

scholarly journals Theoretical Analysis of the Faraday Effect in Carbon Nanotubes with Arbitrary Chirality

2013 ◽  
Vol 2013 ◽  
pp. 1-8
Author(s):  
Abbas Zarifi
Keyword(s):  
Magnetic Field ◽  
Carbon Nanotubes ◽  
Faraday Effect ◽  
Axial Magnetic Field ◽  
Tight Binding ◽  
Nearest Neighbour ◽  
Matrix Elements ◽  
Binding Model ◽  
Weak Magnetic Fields ◽  
Close Form

Using tight-binding model with nearest neighbour interactions, the optical properties of carbon nanotubes under the influence of an external magnetic field are analyzed. First, dipole matrix elements for two cases of light polarized parallel as well as perpendicular to the nanotube axis are analyzed. A close form analytic expression for dipole matrix is obtained for carbon nanotubes with arbitrary chirality in the case of light polarized parallel to the nanotube axis. Then the diagonal and off-diagonal elements of the frequency-dependent susceptibility in the presence of an axial magnetic field are investigated. The off-diagonal elements are applied to calculate the interband Faraday rotation and the Verdet constant. These effects should be clearly detectable under realistic conditions using weak magnetic fields.

AHARONOV–BOHM EFFECT ON QUANTUM TRANSPORT IN SINGLE-WALLED CARBON NANOTUBE INTERFEROMETERS

2010 ◽  
Vol 24 (09) ◽  
pp. 849-857 ◽  
Author(s):  
MEI HAN ◽  
YONG ZHANG
Keyword(s):  
Magnetic Field ◽  
Gate Voltage ◽  
Axial Magnetic Field ◽  
Tight Binding ◽  
Tube Length ◽  
Quantum Conductance ◽  
Tight Binding Approximation ◽  
Single Walled Carbon ◽  
Conductance Oscillation ◽  
Walled Carbon Nanotubes

The quantum conductance of the electron interferometers composed of the armchair and metallic zigzag single-walled carbon nanotubes (SWNTs) in an axial magnetic field lower than 100 T has been studied by using the tight-binding approximation and Landauer–Buttiker formula. Quantum conductance oscillation as a function of gate voltage due to Fabry–Perot like electron interference was found. The analytical expressions of the rapid and slow conductance oscillation periods for the armchair SWNTs have been derived. It is shown that they depend on the magnetic field, gate voltage, and tube length. For the case of the metallic zigzag SWNTs, except rapid conductance oscillation, slow conductance oscillation was also found, which should not exist without the axial magnetic field.

scholarly journals The effects of axial magnetic field on electronic properties of carbon nanotubes

2006 ◽  
Vol 55 (12) ◽  
pp. 6526
Author(s):  
Zhang Zhu-Hua ◽  
Guo Wan-Lin ◽  
Guo Yu-Feng
Keyword(s):  
Magnetic Field ◽  
Carbon Nanotubes ◽  
Electronic Properties ◽  
Axial Magnetic Field

scholarly journals Nonparabolic effects in multiple quantum well structures and influence of external magnetic field on dipole matrix elements

2016 ◽  
Vol 19 (2) ◽  
pp. 39
Author(s):  
Aleksandar Demić ◽  
Jelena Radovanović ◽  
Vitomir Milanović
Keyword(s):  
Magnetic Field ◽  
Matrix Element ◽  
Quantum Well ◽  
Multiple Quantum Well ◽  
Optical Gain ◽  
Multiple Quantum ◽  
Dipole Matrix Element ◽  
Quantum Well Structures ◽  
Quantum Nanostructures ◽  
Field Influence

We present a method of modeling of nonparabolic effects (NPE) in quantum nanostructures by using second order perturbation theory. We apply this model on multiple quantum well structures and consider the influence of external magneticfield on dipole matrix element which is usually considered constant. The dipole matrix element directly influences the optical gain, and our model can provide a better insight to how NPE and magnetic field influence the gain of quantum nanostructures.

Orbital motion of metallic carbon nanotubes in an axial magnetic field

2003 ◽  
Vol 83 (26) ◽  
pp. 5515-5517 ◽  
Author(s):  
Jie Jiang ◽  
Jinming Dong ◽  
D. Y. Xing
Keyword(s):  
Magnetic Field ◽  
Carbon Nanotubes ◽  
Orbital Motion ◽  
Axial Magnetic Field

Electrostatic waves in carbon nanotubes with an axial magnetic field

2013 ◽  
Vol 20 (10) ◽  
pp. 102103 ◽  
Author(s):  
Alireza Abdikian ◽  
Mehran Bagheri
Keyword(s):  
Magnetic Field ◽  
Carbon Nanotubes ◽  
Axial Magnetic Field ◽  
Electrostatic Waves
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