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New insights into the diverse electronic phases of a novel vanadium dioxide polymorph : a terahertz spectroscopy study

หน่วยงาน Nanyang Technological University, Singapore

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ชื่อเรื่อง : New insights into the diverse electronic phases of a novel vanadium dioxide polymorph : a terahertz spectroscopy study
นักวิจัย : Lourembam, James , Srivastava, Amar , La-o-vorakiat, Chan , Rotella, H. , Venkatesan, T. , Chia, Elbert Ee Min
คำค้น : DRNTU::Science::Physics
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2558
อ้างอิง : Lourembam, J., Srivastava, A., La-o-vorakiat, C., Rotella, H., Venkatesan, T., & Chia, E. E. M. (2015). New insights into the diverse electronic phases of a novel vanadium dioxide polymorph : a terahertz spectroscopy study. Scientific reports, 5. , 2045-2322 , http://hdl.handle.net/10220/25387 , http://dx.doi.org/10.1038/srep09182
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Scientific reports
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

A remarkable feature of vanadium dioxide is that it can be synthesized in a number of polymorphs. The conductivity mechanism in the metastable layered polymorph VO2(B) thin films has been investigated by terahertz time-domain spectroscopy (THz-TDS). In VO2(B), a critical temperature of 240 K marks the appearance of a non-zero Drude term in the observed complex conductivity, indicating the evolution from a pure insulating state towards a metallic state. In contrast, the THz conductivity of the well-known VO2(M1) is well fitted only by a modification of the Drude model to include backscattering. We also identified two different THz conductivity regimes separated by temperature in these two polymorphs. The electronic phase diagram is constructed, revealing that the width and onset of the metal-insulator transition in the B phase develop differently from the M1 phase.

บรรณานุกรม :
Lourembam, James , Srivastava, Amar , La-o-vorakiat, Chan , Rotella, H. , Venkatesan, T. , Chia, Elbert Ee Min . (2558). New insights into the diverse electronic phases of a novel vanadium dioxide polymorph : a terahertz spectroscopy study.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Lourembam, James , Srivastava, Amar , La-o-vorakiat, Chan , Rotella, H. , Venkatesan, T. , Chia, Elbert Ee Min . 2558. "New insights into the diverse electronic phases of a novel vanadium dioxide polymorph : a terahertz spectroscopy study".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Lourembam, James , Srivastava, Amar , La-o-vorakiat, Chan , Rotella, H. , Venkatesan, T. , Chia, Elbert Ee Min . "New insights into the diverse electronic phases of a novel vanadium dioxide polymorph : a terahertz spectroscopy study."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2558. Print.
Lourembam, James , Srivastava, Amar , La-o-vorakiat, Chan , Rotella, H. , Venkatesan, T. , Chia, Elbert Ee Min . New insights into the diverse electronic phases of a novel vanadium dioxide polymorph : a terahertz spectroscopy study. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2558.