Anisotropic behavior of excitons in single-crystal α-SnS
Source abstract
Abstract
We investigate analytically the anisotropic dielectric properties of single-crystal α-SnS near the fundamental absorption edge by considering atomic orbitals. Most striking is the excitonic feature in the armchair- (b-) axis direction, which is particularly prominent at low temperatures. To determine the origin of this anisotropy, we perform first-principles calculations using the GW0 Bethe–Salpeter equation including the electron–hole interaction. The results show that the anisotropic dielectric characteristics are a direct result of the natural anisotropy of p orbitals. In particular, this dominant excitonic feature originates from the py orbital at the saddle point in the Γ–Y region.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Chalcogenide Semiconductor Thin Films · Quantum Dots Synthesis And Properties · Semiconductor materials and interfaces
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Physics, Kyung Hee University 1 , Seoul 02447, South Korea
Institute of Materials Science, Vietnam Academy of Science and Technology 2 , Hanoi 100000, Vietnam
Department of Physics and Energy Harvest-Storage Research Center, University of Ulsan 3 , Ulsan 44610, South Korea
Faculty of Physics and Engineering Physics, University of Science, VNU-HCM 4 , Ho Chi Minh City 700000, Vietnam
Center for Converging Humanities, Kyung Hee University 5 , Seoul 02447, South Korea
Funding
National Research Foundation of Korea
References (48)
Show source-provided references
1. Sci. Rep. · 2017 · 7 · 4326210.1038/srep43262 ↗
2. J. Alloys Compd. · 2018 · 745 · 17210.1016/j.jallcom.2018.02.157 ↗
3. RSC Adv. · 2017 · 7 · 1679510.1039/c7ra00373k ↗
4. ACS Appl. Mater. Interfaces · 2017 · 9 · 3403310.1021/acsami.7b08770 ↗
5. Nat. Commun. · 2016 · 7 · 1201110.1038/ncomms12011 ↗
6. 1995 · 56
7. J. Phys. Chem. C · 2018 · 122 · 352310.1021/acs.jpcc.8b00179 ↗
8. Microelectron. Eng. · 2013 · 110 · 2110.1016/j.mee.2013.04.030 ↗
9. Appl. Phys. Lett. · 2013 · 102 · 13211110.1063/1.4801313 ↗
10. Phys. Status Solidi A · 2016 · 213 · 17010.1002/pssa.201532426 ↗
11. Nat. Commun. · 2018 · 9 · 16910.1038/s41467-017-02547-4 ↗
12. Nat. Commun. · 2018 · 9 · 145510.1038/s41467-018-03897-3 ↗
13. Nat. Commun. · 2016 · 7 · 1212210.1038/ncomms12122 ↗
14. Thin Solid Films · 2014 · 558 · 32610.1016/j.tsf.2014.02.083 ↗
15. Sci. Rep. · 2017 · 7 · 3970410.1038/srep39704 ↗
16. Nat. Commun. · 2018 · 9 · 361110.1038/s41467-018-06053-z ↗
17. Phys. Rev. B · 1993 · 47 · 22210.1103/physrevb.47.16222 ↗
18. Temperature dependence of the dielectric function and critical points of α-SnS from 27 to 350 K
19. Phys. Status Solidi B · 2009 · 246 · 18310.1002/pssb.200844235 ↗
20. Phys. Rev. B · 1990 · 42 · 363410.1103/physrevb.42.3634 ↗
21. Phys. Rev. B · 1977 · 16 · 161610.1103/physrevb.16.1616 ↗
22. Phys. Rev. B · 1977 · 15 · 217710.1103/physrevb.15.2177 ↗
23. J. Appl. Phys. · 2014 · 116 · 01351110.1063/1.4886915 ↗
24. ACS Nano · 2017 · 11 · 221910.1021/acsnano.6b08704 ↗
25. Chem. Commun. · 2012 · 48 · 560810.1039/c2cc32033a ↗
26. Cryst. Growth Des. · 2006 · 6 · 217710.1021/cg0602156 ↗
27. J. Am. Chem. Soc. · 2008 · 130 · 1497810.1021/ja8048755 ↗
28. J. Appl. Phys. · 2018 · 124 · 06510210.1063/1.5022151 ↗
29. J. Appl. Phys. · 2007 · 101 · 09352210.1063/1.2729450 ↗
30. J. Appl. Phys. · 2018 · 123 · 17490410.1063/1.4994894 ↗
31. Phys. Chem. Chem. Phys. · 2017 · 19 · 2164810.1039/c7cp03481d ↗
32. Phys. Rev. B · 1994 · 50 · 1795310.1103/physrevb.50.17953 ↗
33. Phys. Rev. B · 1993 · 47 · 55810.1103/physrevb.47.558 ↗
34. Phys. Rev. B · 1992 · 46 · 667110.1103/physrevb.46.6671 ↗
35. Phys. Rev. Lett. · 1996 · 77 · 386510.1103/physrevlett.77.3865 ↗
36. J. Chem. Phys. · 2006 · 124 · 22110110.1063/1.2213970 ↗
37. Phys. Rev. Lett. · 2009 · 102 · 22640110.1103/physrevlett.102.226401 ↗
38. Phys. Rev. · 1951 · 84 · 123210.1103/physrev.84.1232 ↗
39. Phys. Rev. B · 2011 · 83 · 3542210.1103/physrevb.83.035422 ↗
40. J. Appl. Phys. · 2017 · 122 · 08510410.1063/1.4991913 ↗
41. Solid State Commun. · 1975 · 17 · 35510.1016/0038-1098(75)90311-7 ↗
42. Appl. Phys. Lett. · 2012 · 100 · 03210410.1063/1.3675880 ↗
43. Phys. Rev. B · 1992 · 46 · 736310.1103/physrevb.46.7363 ↗
44. Phys. Rev. B · 1990 · 41 · 522710.1103/physrevb.41.5227 ↗
45. 2007
46. Solid State Commun. · 1984 · 52 · 35110.1016/0038-1098(84)90843-3 ↗
47. Phys. Rev. B · 1987 · 36 · 294610.1103/physrevb.36.2946 ↗
48. Nat. Nanotechnol. · 2015 · 10 · 51710.1038/nnano.2015.71 ↗