TY - JOUR
T1 - Electron transport properties through a benzene-type quantum dots molecular system
N1 - Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2023/8/1
Y1 - 2023/8/1
N2 - A benzene-type quantum dots molecular model is designed, and the conductance and time-average current through the system are obtained using the Green's function. The results show that one single resonance peak changes to three resonance peaks with increasing the inter-dot coupling strength. The intensities of the twin peaks in the conductance spectrum are sensitive to the dot-lead coupling strength. An anti-resonance band emerges in the conductance spectrum as the dot-lead coupling strength is strong enough. When an external magnetic field is introduced, the original three conductance resonance peaks evolves into six resonance peaks and meanwhile two anti-resonance bands occur. The widths of the new anti-resonance bands can be tuned by adjusting the magnetic flux. Moreover, a photon-assisted tunneling phenomenon can be observed when the system is irradiated by a time-dependent external field. These results provide insights into the design and development of efficient molecular electronics.
AB - A benzene-type quantum dots molecular model is designed, and the conductance and time-average current through the system are obtained using the Green's function. The results show that one single resonance peak changes to three resonance peaks with increasing the inter-dot coupling strength. The intensities of the twin peaks in the conductance spectrum are sensitive to the dot-lead coupling strength. An anti-resonance band emerges in the conductance spectrum as the dot-lead coupling strength is strong enough. When an external magnetic field is introduced, the original three conductance resonance peaks evolves into six resonance peaks and meanwhile two anti-resonance bands occur. The widths of the new anti-resonance bands can be tuned by adjusting the magnetic flux. Moreover, a photon-assisted tunneling phenomenon can be observed when the system is irradiated by a time-dependent external field. These results provide insights into the design and development of efficient molecular electronics.
KW - 73.21.La
KW - 73.40.Gk
KW - 73.63.Kv
KW - Average current
KW - Benzene-type quantum dot molecule
KW - Green's function
KW - Time-dependent external field
UR - http://www.scopus.com/inward/record.url?scp=85159190859&partnerID=8YFLogxK
U2 - 10.1016/j.physb.2023.414928
DO - 10.1016/j.physb.2023.414928
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AN - SCOPUS:85159190859
SN - 0921-4526
VL - 662
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
M1 - 414928
ER -