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Title: Nonmonotonic band gap evolution in bent phosphorene nanosheets

Journal Article · · Physical Review Materials
 [1];  [2];  [3];  [4]
  1. Univ. of California, Santa Barbara, CA (United States)
  2. Univ. of California, Berkeley, CA (United States). Dept. of Chemistry; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Science Division
  3. Hebrew Univ. of Jerusalem (Israel). Inst. of Chemistry, Fritz Haber Center for Molecular Dynamics
  4. Univ. of California, Los Angeles, CA (United States). Dept. of Chemistry and Biochemistry

Nonmonotonic bending-induced changes of fundamental band gaps and quasiparticle energies are observed for realistic nanoscale phosphorene nanosheets. Calculations using stochastic many-body perturbation theory show that even slight curvature causes significant changes in the electronic properties. For small bending radii (<4 nm) the band gap changes from direct to indirect. The response of phosphorene to deformation is strongly anisotropic (different for zigzag vs armchair bending) due to an interplay of exchange and correlation effects. Finally, our results show that fundamental band gaps of phosphorene sheets can be manipulated by as much as 0.7 eV depending on the bending direction.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Photonics at Thermodynamic Limits (PTL); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-05CH11231; SC0019140
OSTI ID:
1572022
Journal Information:
Physical Review Materials, Journal Name: Physical Review Materials Journal Issue: 6 Vol. 3; ISSN PRMHAR; ISSN 2475-9953
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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