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Geometrical effects on the thermoelectric properties of ballistic graphene antidot lattices

Karamitaheri, H ; Sharif University of Technology | 2011

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  1. Type of Document: Article
  2. DOI: 10.1063/1.3629990
  3. Publisher: 2011
  4. Abstract:
  5. The thermoelectric properties of graphene-based antidot lattices are theoretically investigated. A third nearest-neighbor tight-binding model and a fourth nearest-neighbor force constant model are employed to study the electronic and phononic band structures of graphene antidot lattices with circular, rectangular, hexagonal, and triangular antidot shapes. Ballistic transport models are used to evaluate transport coefficients. Methods to reduce the thermal conductance and to increase the thermoelectric power factor of such structures are studied. Our results indicate that triangular antidot lattices have the smallest thermal conductance due to longer boundaries and the smallest distance between the neighboring antidots. Among them, iso-triangular antidot lattices have also a large power factor and as a result a large figure of merit
  6. Keywords:
  7. Antidot lattice ; Antidots ; Ballistic transports ; Force constant models ; Geometrical effect ; Large power ; Nearest-neighbors ; Thermal conductance ; Thermoelectric power factors ; Thermoelectric properties ; Tight binding model ; Transport coefficient ; Triangular antidot ; Ballistics ; Electric power factor ; Thermal conductivity ; Thermoelectric equipment ; Thermoelectric power ; Graphene
  8. Source: Journal of Applied Physics ; Volume 110, Issue 5 , 2011 ; 00218979 (ISSN)
  9. URL: http://scitation.aip.org/content/aip/journal/jap/110/5/10.1063/1.3629990