Many-body effects and excitonic features in 2D biphenylene carbon

Journal Article · Thu Jan 14 04:00:00 EST 2016 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.4939273· OSTI ID:22493648

Lüder, Johann; Puglia, Carla; Eriksson, Olle; Sanyal, Biplab; Brena, Barbara ^[1]; Ottosson, Henrik ^[2]

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1. Department of Physics and Astronomy, Uppsala University, P.O. Box 516, 751 20 Uppsala (Sweden)
2. Department of Chemistry–BMC, Uppsala University, P.O. Box 576, 751 23 Uppsala (Sweden)

The remarkable excitonic effects in low dimensional materials in connection to large binding energies of excitons are of great importance for research and technological applications such as in solar energy and quantum information processing as well as for fundamental investigations. In this study, the unique electronic and excitonic properties of the two dimensional carbon network biphenylene carbon were investigated with GW approach and the Bethe-Salpeter equation accounting for electron correlation effects and electron-hole interactions, respectively. Biphenylene carbon exhibits characteristic features including bright and dark excitons populating the optical gap of 0.52 eV and exciton binding energies of 530 meV as well as a technologically relevant intrinsic band gap of 1.05 eV. Biphenylene carbon’s excitonic features, possibly tuned, suggest possible applications in the field of solar energy and quantum information technology in the future.

• OSTI ID: 22493648
• Journal Information: Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 2 Vol. 144; ISSN JCPSA6; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BETHE-SALPETER EQUATION
BINDING ENERGY
BIPHENYL
CARBON
DATA PROCESSING
ELECTRON CORRELATION
ENERGY GAP
EV RANGE
EXCITONS
HOLES
MANY-BODY PROBLEM
QUANTUM INFORMATION
TWO-DIMENSIONAL CALCULATIONS
TWO-DIMENSIONAL SYSTEMS