Tight-binding study of electron-hole pair condensation in graphene bilayers: Gate control and system-parameter dependence

2010 ◽  
Vol 82 (7) ◽  
Author(s):  
D. Basu ◽  
L. F. Register ◽  
Dharmendar Reddy ◽  
A. H. MacDonald ◽  
S. K. Banerjee
Keyword(s):  
System Parameter ◽  
Tight Binding ◽  
Hole Pair ◽  
Binding Study ◽  
Parameter Dependence ◽  
Electron Hole ◽  
Gate Control ◽  
Electron Hole Pair ◽  
Pair Condensation

scholarly journals Lattice distortion inducing electron-hole pair condensation in two dimensional systems

2016 ◽  
Vol 726 ◽  
pp. 012013
Author(s):  
Do Thi Hong Hai ◽  
Nguyen Thi Giang ◽  
Nguyen Huu Nha ◽  
Phan Van Nham
Keyword(s):  
Lattice Distortion ◽  
Hole Pair ◽  
Two Dimensional ◽  
Electron Hole ◽  
Electron Hole Pair ◽  
Pair Condensation

Electron-hole pair condensation in a graphene bilayer

JETP Letters ◽  
2008 ◽  
Vol 87 (1) ◽  
pp. 55-59 ◽  
Author(s):  
Yu. E. Lozovik ◽  
A. A. Sokolik
Keyword(s):  
Hole Pair ◽  
Graphene Bilayer ◽  
Electron Hole ◽  
Electron Hole Pair ◽  
Pair Condensation

scholarly journals Revealing generation, migration, and dissociation of electron-hole pairs and current emergence in an organic photovoltaic cell

2021 ◽  
Vol 7 (25) ◽  
pp. eabf7672
Author(s):  
Ziyao Xu ◽  
Yi Zhou ◽  
Chi Yung Yam ◽  
Lynn Groß ◽  
Antonietta De Sio ◽  
...  
Keyword(s):  
Density Functional ◽  
Degrees Of Freedom ◽  
Tight Binding ◽  
Photovoltaic Cell ◽  
Hole Pair ◽  
Organic Photovoltaic ◽  
Electron Hole ◽  
Organic Photovoltaic Cell ◽  
Quantum Mechanical Method ◽  
Electron Hole Pair

Using an innovative quantum mechanical method for an open quantum system, we observe in real time and space the generation, migration, and dissociation of electron-hole pairs, transport of electrons and holes, and current emergence in an organic photovoltaic cell. Ehrenfest dynamics is used to study photoexcitation of thiophene:fullerene stacks coupled with a time-dependent density functional tight-binding method. Our results display the generation of an electron-hole pair in the donor and its subsequent migration to the donor-acceptor interface. At the interface, electrons transfer from the lowest unoccupied molecular orbitals (LUMOs) of thiophenes to the second LUMOs of fullerene. Further migration of electrons and holes leads to the emergence of current. These findings support previous experimental evidence of coherent couplings between electronic and vibrational degrees of freedom and are expected to stimulate further work toward exploring the interplay between electron-hole pair (exciton) binding and vibronic coupling for charge separation and transport.

Observation of the effect of DAP separation on electron-hole pair ODMR signals in GaS

1982 ◽  
Vol 44 (4) ◽  
pp. 459-464 ◽  
Author(s):  
N. Killoran ◽  
B.C. Cavenett ◽  
F. Levy
Keyword(s):  
Hole Pair ◽  
Electron Hole ◽  
Electron Hole Pair
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