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Strong magnetophonon resonance induced triple G-mode splitting in graphene on graphite probed by micromagneto Raman spectroscopy

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Strong magnetophonon resonance induced triple G-mode splitting in graphene on graphite probed by micromagneto Raman spectroscopy
นักวิจัย : Qiu, Caiyu , Shen, Xiaonan , Cao, Bingchen , Cong, Chunxiao , Saito, Riichiro , Yu, Jingjiang , Dresselhaus, Mildred S. , Yu, Ting
คำค้น : DRNTU::Science::Physics
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2556
อ้างอิง : Qiu, C., Shen, X., Cao, B., Cong, C., Saito, R., Yu, J., et al. (2013). Strong magnetophonon resonance induced triple G-mode splitting in graphene on graphite probed by micromagneto Raman spectroscopy. Physical review B, 88(16), 165407-. , http://hdl.handle.net/10220/18736 , http://dx.doi.org/10.1103/PhysRevB.88.165407
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Physical review B
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

The resonance between the G-band phonon excitation and Landau level optical transitions in graphene has been systematically studied by micromagneto Raman mapping. In purely decoupled graphene regions on a graphite substrate, eight traces of anticrossing spectral features with G-mode peaks are observed as a function of magnetic fields up to 9 T, and these traces correspond to either symmetric or asymmetric Landau level transitions. Three distinct split peaks of the G mode, named G−, Gi, and G+, are observed at the strong magnetophonon resonance condition corresponding to a magnetic field of ∼4.65 T. These three special modes are attributed to (i) the coupling between the G phonon and the magneto-optical transitions, which is responsible for G+ and G− and can be well described by the two coupled mode model and (ii) the magnetic field-dependent oscillation of the Gi band, which is currently explained by the G band of graphite modified by the interaction with G+ and G−. The pronounced interaction between Dirac fermions and phonons demonstrates a dramatically small Landau level width (∼1.3 meV), which is a signature of the ultrahigh quality graphene obtained on the surface of graphite.

NRF (Natl Research Foundation, S’pore)

บรรณานุกรม :
Qiu, Caiyu , Shen, Xiaonan , Cao, Bingchen , Cong, Chunxiao , Saito, Riichiro , Yu, Jingjiang , Dresselhaus, Mildred S. , Yu, Ting . (2556). Strong magnetophonon resonance induced triple G-mode splitting in graphene on graphite probed by micromagneto Raman spectroscopy.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Qiu, Caiyu , Shen, Xiaonan , Cao, Bingchen , Cong, Chunxiao , Saito, Riichiro , Yu, Jingjiang , Dresselhaus, Mildred S. , Yu, Ting . 2556. "Strong magnetophonon resonance induced triple G-mode splitting in graphene on graphite probed by micromagneto Raman spectroscopy".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Qiu, Caiyu , Shen, Xiaonan , Cao, Bingchen , Cong, Chunxiao , Saito, Riichiro , Yu, Jingjiang , Dresselhaus, Mildred S. , Yu, Ting . "Strong magnetophonon resonance induced triple G-mode splitting in graphene on graphite probed by micromagneto Raman spectroscopy."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2556. Print.
Qiu, Caiyu , Shen, Xiaonan , Cao, Bingchen , Cong, Chunxiao , Saito, Riichiro , Yu, Jingjiang , Dresselhaus, Mildred S. , Yu, Ting . Strong magnetophonon resonance induced triple G-mode splitting in graphene on graphite probed by micromagneto Raman spectroscopy. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2556.