Quantum capacitance in monolayers of silicene and related buckled materials

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• 作者：S. Nawaz^a ; ^b ; ^c ; ^{shadi665@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; M. Tahir^d ; ^{m.tahir06@alumni.imperial.ac.uk" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Silicene and related materials ; Quantum capacitance ; Spin Orbit Interactions ; Puddle effects
• 刊名：Physica E: Low-dimensional Systems and Nanostructures
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：76
• 期：Complete
• 页码：169-172
• 全文大小：374 K

文摘

Silicene and related buckled materials are distinct from both the conventional two dimensional electron gas and the famous graphene due to strong spin orbit coupling and the buckled structure. These materials have potential to overcome limitations encountered for graphene, in particular the zero band gap and weak spin orbit coupling. We present a theoretical realization of quantum capacitance which has advantages over the scattering problems of traditional transport measurements. We derive and discuss quantum capacitance as a function of the Fermi energy and temperature taking into account electron–hole puddles through a Gaussian broadening distribution. Our predicted results are very exciting and pave the way for future spintronic and valleytronic devices.