Zero Landau level in folded graphene nanoribbons.

نویسندگان

  • E Prada
  • P San-Jose
  • L Brey
چکیده

Graphene nanoribbons can be folded into a double layer system keeping the two layers decoupled. In the quantum Hall regime folds behave as a new type of Hall bar edge. We show that the symmetry properties of the zero Landau level in metallic nanoribbons dictate that the zero energy edge states traversing a fold are perfectly transmitted onto the opposite layer. This result is valid irrespective of fold geometry, magnetic field strength, and crystallographic orientation of the nanoribbon. Backscattering suppression on the N=0 Hall plateau is ultimately due to the orthogonality of forward and backward channels, much like in the Klein paradox.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Reference Transport through Graphene on SrTiO

We report transport measurements through graphene on SrTiO3 substrates as a function of magnetic field B, carrier density n, and temperature T. The large dielectric constant of SrTiO3 very effectively screens long-range electron-electron interactions and potential fluctuations, making Dirac electrons in graphene virtually noninteracting. The absence of interactions results in an unexpected beha...

متن کامل

Magnetoplasmons in quasineutral epitaxial graphene nanoribbons.

We present an infrared transmission spectroscopy study of the inter-Landau-level excitations in quasineutral epitaxial graphene nanoribbon arrays. We observed a substantial deviation in energy of the L(0(-1)) → L(1(0)) transition from the characteristic square root magnetic-field dependence of two-dimensional graphene. This deviation arises from the formation of an upper-hybrid mode between the...

متن کامل

Semiconducting graphene nanoribbon retains band gap on amorphous or crystalline SiO2

Related Articles Excitation of discrete and continuous spectrum for a surface conductivity model of graphene J. Appl. Phys. 110, 114305 (2011) Abnormal electronic transport and negative differential resistance of graphene nanoribbons with defects Appl. Phys. Lett. 99, 192102 (2011) The effect of doping on the energetics and quantum conductance in graphene nanoribbons with a metallocene adsorbat...

متن کامل

بررسی خواص مغناطیسی ریزساختارهای نانومتری گرافینی و نانوروبان‌های گرافینی زیگزاگ‎

The discovery of graphene and its remarkable electronic and magnetic properties has initiated great research interest in this material. Furthermore, there are many derivatives in these graphene related materials among which graphene nanoribbons and graphene nanofragments are candidates for future carbon-based nanoelectronics and spintronics. Theoretical studies have shown that magnetism can ari...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Physical review letters

دوره 105 10  شماره 

صفحات  -

تاریخ انتشار 2010