Talk:Ming-Fa Lin

English Title of PhD Dissertation

The English title listed in the National Digital Library in Taiwan is "Mand-Body Effects in Graphite Intercalation Compounds and Graphene Tubules" (https://hdl.handle.net/11296/z92prp).

The English title listed in the National Tsing Hua University Library is "Many- Body Effects in Graphite Intercalation Compounds and Graphene Tubules" (https://nthu.primo.exlibrisgroup.com/permalink/886UST_NTHU/13efpo6/alma990001089380206774).

The English title should be corrected as "Many-Body Effects in Graphite Intercalation Compounds and Graphene Tubules".

I've informed the two libraries to correct the English title. I will modify the typo on the Wikipedia article page after the libraries correct the issues.

Hsienching (talk) 15:18, 26 April 2024 (UTC)

On Apr. 29th, The English title listed in the National Tsing Hua University Library was corrected to "Many-Body Effects in Graphite Intercalation Compounds and Graphene Tubules". (https://nthu.primo.exlibrisgroup.com/permalink/886UST_NTHU/13efpo6/alma990001089380206774)

I'll modify the title and add the original data source on the Wiki page.

Hsienching (talk) 02:14, 7 May 2024 (UTC)

On May 10th, The English title listed in the National Digital Library in Taiwan was corrected to "Many-Body Effects in Graphite Intercalation Compounds and Graphene Tubules" (https://hdl.handle.net/11296/z92prp).

The English title listed on the Wiki page has been corrected.

Hsienching (talk) 15:59, 11 May 2024 (UTC)

Research highlights

A section of "Research highlights" can be added, putting the representative research contribution of Prof. Ming-Fa Lin. The subsections are representative research topics. The order of sections should be adjusted for smooth reading.

Hsienching (talk) 09:09, 26 June 2024 (UTC)

Research highlights - Optical properties of graphene nanoribbons

Prof. Ming-Fa Lin has representative contribution in "optical properties of graphene nanoribbons", which can be found in Graphene nanoribbon#Optical properties. A brief description about the research contribution can be added to a subsection of "Research highlights".

Here is the Wikipedia content backup (date=2024-06-26):

Main article: Graphene nanoribbon § Optical properties

The earliest numerical results on the optical properties of graphene nanoribbons were obtained by Lin and Shyu in 2000. The different selection rules for optical transitions in graphene nanoribbons with armchair and zigzag edges were reported. These results were supplemented by a comparative study of zigzag nanoribbons with single wall armchair carbon nanotubes by Hsu and Reichl in 2007. It was demonstrated that selection rules in zigzag ribbons are different from those in carbon nanotube and the eigenstates in zigzag ribbons can be classified as either symmetric or antisymmetric. Also, it was predicted that edge states should play an important role in the optical absorption of zigzag nanoribbons. Optical transitions between the edge and bulk states should enrich the low-energy region ($<3$ eV) of the absorption spectrum by strong absorption peaks. Analytical derivation of the numerically obtained selection rules was presented in 2011. The selection rule for the incident light polarized longitudinally to the zigzag ribbon axis is that $\Delta J=J_{2}-J_{1}$ is odd, where $J_{1}$ and $J_{2}$ number the energy bands, while for the perpendicular polarization $\Delta J=J_{2}-J_{1}$ is even. Intraband (intersubband) transitions between the conduction (valence) sub-bands are also allowed if $\Delta J=J_{2}-J_{1}$ is even.

Optical selection rules of zigzag graphene nanoribbons

For graphene nanoribbons with armchair edges the selection rule is $\Delta J=J_{2}-J_{1}=0$. Similar to tubes transitions intersubband transitions are forbidden for armchair graphene nanoribbons. Despite different selection rules in single wall armchair carbon nanotubes and zigzag graphene nanoribbons a hidden correlation of the absorption peaks is predicted. The correlation of the absorption peaks in tubes and ribbons should take place when the number of atoms in the tube unit cell $N_{t}$ is related to the number of atoms in the zigzag ribbon unit cell $N_{r}$ as follows: $N_{t}=2N_{r}+4$, which is so-called matching condition for the periodic and hard wall boundary conditions. These results obtained within the nearest-neighbor approximation of the tight-binding model have been corroborated with first principles density functional theory calculations taking into account exchange and correlation effects.

First-principle calculations with quasiparticle corrections and many-body effects explored the electronic and optical properties of graphene-based materials. With GW calculation, the properties of graphene-based materials are accurately investigated, including graphene nanoribbons, edge and surface functionalized armchair graphene nanoribbons and scaling properties in armchair graphene nanoribbons.

Hsienching (talk) 09:22, 26 June 2024 (UTC) Hsienching (talk) 09:22, 26 June 2024 (UTC)

A brief description about the research contribution is shown below.

Absorption spectra of monolayer graphene nanoribbons with $N_{y}=72$
(a) The zigzag graphene nanoribbons possess an optical selection rule of $\Delta J=odd$. (b) The armchair graphene nanoribbons possess an optical selection rule of $\Delta J=0$.

In 2000, Lin cooperated with Shyu to calculate the optical properties of graphene nanoribbons numerically.[REF] The different selection rules for optical transitions in zigzag and armchair graphene nanoribbons were first reported. In 2007, these results were supplemented by a comparative study of zigzag graphene nanoribbons with single-wall armchair carbon nanotubes by Hsu and Reichl.[REF] In 2011, Lin conducted Chung et al. to analyze and report the edge-dependent optical selection rules analytically.[REF] In the meantime, Sasaki et al. also reported their theoretical prediction as a confirmation.[REF]

The selection rule in zigzag graphene nanoribbons differs from that in armchair graphene nanoribbons. Optical transitions between the edge and bulk states enrich the low-energy region absorption spectrum ($<$ 3 eV) with high-intensity absorption peaks. Analytical derivation of the numerically obtained selection rules was presented in 2011.[REF] The selection rule for the incident light polarized longitudinally to the zigzag nanoribbon axis is that $|\Delta J|=|J^{c}-J^{v}|=odd$, where $J^{c}$ and $J^{v}$ are index number for the conduction and valence energy subbands, respectively. For armchair graphene nanoribbons, the selection rule is $\Delta J=J^{c}-J^{v}=0$.

Hsienching (talk) 13:02, 26 June 2024 (UTC)

The above brief description about the research contribution has been added.

Hsienching (talk) 13:51, 26 June 2024 (UTC)