Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 조준형 | - |
dc.date.accessioned | 2019-12-10T01:08:17Z | - |
dc.date.available | 2019-12-10T01:08:17Z | - |
dc.date.issued | 2018-11 | - |
dc.identifier.citation | PHYSICAL REVIEW B, v. 98, no. 19, Article no. 195424 | en_US |
dc.identifier.issn | 2469-9950 | - |
dc.identifier.issn | 2469-9969 | - |
dc.identifier.uri | https://journals.aps.org/prb/abstract/10.1103/PhysRevB.98.195424 | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/120561 | - |
dc.description.abstract | The creation of magnetism on nonmagnetic semiconductor surfaces is of importance for the realization of spintronics devices. In particular, the coupling of electron spins within quantum nanostructures can be utilized for nanomagnetism applications. Here, we demonstrate, based on first-principles density-functional theory calculations, that the adsorption of H atoms on the Si(111)-(7 x 7) surface induces the spin polarization of surrounding Si dangling bonds (DBs) and their spin orderings. It is revealed that the H adsorption on a rest-atom site exhibits a Jahn-Teller-like distortion that accompanies a charge transfer from the rest atom to the nearest-neighboring adatoms. This charge transfer increases the local density of states of three such adatoms at the Fermi level, thereby inducing a Stoner-type instability to produce a ferrimagnetic order of adatom DBs around the adsorbed H atom. Meanwhile, the H adsorption on an adatom site cannot induce spin polarization, but, as adsorbed H atoms increase, the ferrimagnetic order of rest-atom DBs emerges through the charge transfer from rest atoms to adatoms. Our findings provide a microscopic mechanism of the H-induced spin orderings of Si DBs at the atomic scale, which paves the way for the design of nanoscale magnetism in the representative semiconductor surface. | en_US |
dc.description.sponsorship | We are grateful for discussions with Y. Jia. This work is supported by the NSFC of China (Grants No. 11804306, No. 11674289, and No. 11504332) and National Research Foundation of Korea (NRF) funded by the Korean Government (Grants No. 2015M3D1A1070639 and No. 2016K1A4A3914691). The calculations were performed at the High Performance Computational Center of Zhengzhou University. J.-H.C. acknowledges the strategic support program (KSC-2017-C3-0080) for supercomputing application research from the KISTI supercomputing center. | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | AMER PHYSICAL SOC | en_US |
dc.subject | ATOMIC-HYDROGEN | en_US |
dc.subject | FERROMAGNETISM | en_US |
dc.subject | DIFFUSION | en_US |
dc.subject | METALS | en_US |
dc.subject | PATHS | en_US |
dc.title | Hydrogen adsorption induced nanomagnetism at the Si(111)-(7 x 7) surface | en_US |
dc.type | Article | en_US |
dc.relation.no | 19 | - |
dc.relation.volume | 98 | - |
dc.identifier.doi | 10.1103/PhysRevB.98.195424 | - |
dc.relation.page | 195424-195424 | - |
dc.relation.journal | PHYSICAL REVIEW B | - |
dc.contributor.googleauthor | Ren, Xiao-Yan | - |
dc.contributor.googleauthor | Niu, Chun-Yao | - |
dc.contributor.googleauthor | Yi, Seho | - |
dc.contributor.googleauthor | Li, Shunfang | - |
dc.contributor.googleauthor | Cho, Jun-Hyung | - |
dc.relation.code | 2018003681 | - |
dc.sector.campus | S | - |
dc.sector.daehak | COLLEGE OF NATURAL SCIENCES[S] | - |
dc.sector.department | DEPARTMENT OF PHYSICS | - |
dc.identifier.pid | chojh | - |
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