[演講] Electronic and optical properties of graphene nanoribbons in external fields (2015-10-28)

獻慶於2015-10-28去成功大學微奈米科技研究中心，給一場演講。

關於"奈米石墨帶於外場下的電子及光學性質"。

--------------------

這個時間點超棒的，剛好就在文章投稿之後。當晚做投影片到凌晨四點半。但是，將整理好的感覺真棒! 而且還有人可以分享!

(FB link: https://www.facebook.com/hsienching.chung/posts/1067108286635473?pnref=story )

感謝:

陳顯禎主任邀請演講。讓獻慶有這個機會，把這個題材的相關資料進行整理並分享。

鄧熙聖教授、張世慧教授，意見交流，並提供實驗上的觀點。

相關資料:

演講公告

演講人：鍾獻慶博士

演講題目：Electronic and optical properties of graphene nanoribbons in external fields

日期/時間：2015.10.28，星期三，11:10 ~ 12:00

地點：成功大學自強校區科技大樓4F    9064會議室

講綱：

      A review work is done for electronic and optical properties of graphene nanoribbons in magnetic, electric, composite, and modulated fields. Effects due to the lateral confinement, curvature, stacking, non-uniform subsystems and hybrid structures are taken into account. The special electronic properties, induced by complex competitions between external fields and geometric structures, include many one-dimensional parabolic subbands, standing waves, peculiar edge-localized states, width- and field-dependent energy gaps, magnetic-quantized quasi-Landau levels, curvature-induced oscillating Landau subbands, crossings and anti-crossings of quasi-Landau levels, coexistence and combination of energy spectra in layered structures, and various peak structures in the density of states. There exist diverse absorption spectra and different selection rules, covering edge-dependent selection rules, magneto-optical selection rule, splitting of the Landau absorption peaks, intragroup and intergroup Landau transitions, as well as coexistence of monolayer-like and bilayer-like Landau absorption spectra. Detailed comparisons are made between the theoretical calculations and experimental measurements. The predicted results, the parabolic subbands, edge-localized states, gap opening and modulation, and spatial distribution of Landau subbands, have been verified by various experimental measurements.     

---