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The experimentally fabricated GNW and its straight counterpart GNR sharing the same width. The GNW is made of two alternating armchair GNRs with widths of 9 and 6, hence denoted as ( ). The GNR is armchair-edged with a width of 9 (AGNR-9) (more notation details in Ref. 12 ). Both systems are hydrogenated and arrows indicate uniaxial tension applied in the periodic direction.
(a) Stress-strain relation of the GNW (solid line with circles) and GNR (dashed line with squares). The inset figure shows the linear elastic behaviors of both the GNW and GNR for the small strain range. (b) Electronic bandgap versus strain of the GNW. (c) Phonon thermal conductance and (d) maximum ZT versus strain of the GNW at room temperature.
Atomic structures of (a) the GNW ( ) and (b) its dislocated counterpart. Both systems are periodic in the horizontal direction with two unit cells shown.
(a) Phonon thermal conductance versus temperature of the GNW (black) and dislocated counterpart (red). (b) Electrical conductance Ge , (c) thermal power S, and (d) thermoelectric figure of merit ZT versus chemical potential μ at room temperature (T = 300 K) of the GNW (black) and dislocated counterpart (red). The zero in the chemical potential is chosen at the Fermi level.
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