2006
DOI: 10.1063/1.2356604
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Surface reconstructions of cubic gallium nitride (001) grown by radio frequency nitrogen plasma molecular beam epitaxy under gallium-rich conditions

Abstract: Cubic GaN has been grown under gallium ͑Ga͒-rich growth conditions using radio frequency nitrogen plasma molecular beam epitaxy on MgO͑001͒ substrates. Reflection high energy electron diffraction patterns indicate the smoothness of the c-GaN surface and show 2ϫ and even 8ϫ periodicities after the growth at sample temperature T s Ͻ 200°C and 1 ϫ 1 at higher temperatures. Scanning tunneling microscopy images reveal a sequence of variant surface reconstructions including c͑4 ϫ 12͒, 4ϫ 7, c͑4 ϫ 16͒, 4ϫ 9, c͑4 ϫ 20… Show more

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Cited by 3 publications
(3 citation statements)
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“…21,22 During growth, reflection high-energy electron diffraction ͑RHEED͒ using 20 keV electron energy is used to monitor the surface structure and the in-plane lattice parameter. The MgO substrate is first cleaned with acetone and isopropanol, then loaded into the MBE chamber and heated up to 1000°C for 30 min under nitrogen plasma.…”
Section: Methodsmentioning
confidence: 99%
“…21,22 During growth, reflection high-energy electron diffraction ͑RHEED͒ using 20 keV electron energy is used to monitor the surface structure and the in-plane lattice parameter. The MgO substrate is first cleaned with acetone and isopropanol, then loaded into the MBE chamber and heated up to 1000°C for 30 min under nitrogen plasma.…”
Section: Methodsmentioning
confidence: 99%
“…2 are RHEED patterns of ScGaN growth on sapphire(0001) [10]. For these values of x = 0.54 and 0.78, the RHEED pattern is similar to that of ScN(111) along [1][2][3][4][5][6][7][8][9][10] but with also the development of a ring-like structure, indicating polycrystalline ScGaN (111)-oriented grains. Comparing this to the growth at x = 0.5 and 0.75 on MgO(001) [see Fig.…”
Section: Methodsmentioning
confidence: 87%
“…zinc-blende bonding structure with a lattice constant of a c-GaN = 0.452 nm[1,2]. On the other hand, scandium nitride (ScN) is a semiconductor with a direct band gap of eV…”
mentioning
confidence: 99%