石墨烯/超導體複合系統之傳輸特性研究

Transport in hybrid graphene/superconductor systems

林正全(Jheng-Cyuan Lin)

指導教授 ： 梁啟德

國立臺灣大學/理學院/物理研究所/碩士(2012年)

https://doi.org/10.6342/NTU.2012.10072

摘要

在本篇論文我們關注超導體與石墨烯複合系統的傳輸特性。主要的發想是想研究超導與石墨烯之間的特殊的安德烈夫反射現象(Andreev reflection)。並側重在整合高溫超導體(如YBCO、EuBCO)與石墨烯。我們可能觀察到在超導體與石墨稀介面發生安德烈夫反射現象的證據。更進一步我們嘗試結合鐵基超導體與石墨烯，並嘗試研究不均勻磁場如何影響石墨稀的傳輸特性。這有可能是可以看到任意子(Anyon)的一種系統。
我們的實驗結合高溫超導與石墨烯，這是以往別人未做過的嘗試。期望未來有更進一步的發展與前瞻的應用。

關鍵字

石墨烯 ； 超導體

並列摘要

In this thesis, we study transport properties of superconductor/graphene systems. The main purpose is to study Andreev reflection between graphene and superconductor. In particular, our study is focusing on integrating graphene with a high-temperature superconductor such as YBCO and EuBCO. We have observed possible evidence for Andreev reflection between graphene and EuBCO. We also attempt to combine an iron-based superconductor, such as FeTeSe, with graphene so as to study how a non-uniform magnetic field can affect the transport properties of a graphene flake. It is predicted that anyon statistics can be observed even in the weakly interacting regime. Our new experimental results may well represent the first experimental realization of combining a high-temperature superconductor with graphene.

並列關鍵字

graphene ； superconductor

參考文獻

CH 1

[1] H. K. Onnes, Commun. Phys. Lab. Univ. Leiden 12, 120 (1911).

[2] Charles P. Poole, Jr., Horacio A. Farach, Richard J. Creswick, “Superconductivity”, (Academic Press, 1995).

[3] M. K. Wu, J. R. Ashburn, C. J. Torng, P. H. Hor, R. L. Meng, L. Gao, Z. J. Huang, Y. Q. Wang, and C. W. Chu, Physical Review Letters 58, 908 (1987).

[4] J. Bardeen, L. N. Cooper and J. R. Schrieffer, Physical Review 108, 1175 (1957).