Valley filter in strain engineered graphene

Fujita, T.; Jalil, M. B. A.; Tan, S. G.
July 2010
Applied Physics Letters;7/26/2010, Vol. 97 Issue 4, p043508
Academic Journal
We propose a simple, yet highly efficient and robust device for producing valley polarized current in graphene. The device comprises of two distinct components; a region of uniform uniaxial strain, adjacent to an out-of-plane magnetic barrier configuration formed by patterned ferromagnetic stripes. We show that when the amount of strain, magnetic field strength, and Fermi level are properly tuned, the output current can be made to consist of only a single valley contribution. Perfect valley filtering is achievable within experimentally accessible parameters.


Related Articles

  • Energy gaps at neutrality point in bilayer graphene in a magnetic field. Gorbar, E. V.; Gusynin, V. P.; Miransky, V. A. // JETP Letters;May2010, Vol. 91 Issue 6, p314 

    Utilizing the Baym-Kadanoff formalism with the polarization function calculated in the random phase approximation, the dynamics of the ν = 0 quantum Hall state in bilayer graphene is analyzed. Two phases with nonzero energy gap, the ferromagnetic and layer asymmetric ones, are found. The...

  • Tunneling Charge Transport in Graphene-Based Superconductor Junctions. Wojciechowski, R.J.; Kowalewski, L.; Nogala, M. // Acta Physica Polonica, A.;May/Jun2012, Vol. 121 Issue 5/6, p1092 

    We study the spin polarized electron and hole tunneling transport through a graphene-based ferromagnet(GF1)-insulator(GI1)-superconductor(GS)-insulator(GI2)-ferromagnet(GF2) junction. Proximity induced spin polarization and superconductivity in a graphene sheet are assumed to be created by...

  • Change in the Polarization Characteristics of the [sup 1]P[sub 1]—[sup 1]S[sub 0] Transition of Helium-Like Ions under the Action of Collisions in the Presence of a Strong Magnetic Field. Petrashen’, A. G. // Optics & Spectroscopy;Feb2003, Vol. 94 Issue 2, p157 

    The effect of a strong magnetic field on the collision-induced change in the polarization characteristics of radiation emitted by excited helium-like ions is considered. Concrete calculations for the C V, Al XII, and Ti XXI ions in the ¹P[sub 1] state showed that magnetic fields of a few...

  • Current Sheets in Magnetic Configurations with Singular X-Lines. Bogdanov, S. Yu.; Kyrie, N. P.; Markov, V. S.; Frank, A. G. // JETP Letters;1/25/2000, Vol. 71 Issue 2, p53 

    The possibility of the formation of current sheets in 3D magnetic configurations with singular X-lines was studied experimentally. It is shown that a sheet can be formed in the presence of the longitudinal magnetic-field component directed along the X-line, in which case the longitudinal...

  • Thin-film magnetic patterns in an external field. Bryant, Paul; Suhl, Harry // Applied Physics Letters;5/29/1989, Vol. 54 Issue 22, p2224 

    The behavior of ideally soft ferromagnetic films in the presence of a weak coplanar magnetic field is explored by the method of characteristics. Solutions are found which have no internal field or in some cases have field-free zones. Results are specifically given for circular and elliptic...

  • Spiral Vortices in Ferromagnets. Borisov, A. B. // JETP Letters;3/10/2001, Vol. 73 Issue 5, p242 

    New types of magnetic defects in two-dimensional ferromagnets are found in the exchange approximation, and the influence of magnetic anisotropy on their structure is analyzed. � 2001 MAIK �Nauka / Interperiodica�.

  • Photothermally modulated stray field imaging of magnetic materials. Hoppstadter, D.; Netzelmann, U. // Applied Physics Letters;7/25/1994, Vol. 65 Issue 4, p499 

    Presents a technique for ferromagnetic material imaging using photothermally modulated stray fields of the surfaces. Use of focused laser beam heating; Measurement of magnetic flux changes; Lateral resolution of the images achieved.

  • Helical magnetic configuration formed by using shaped ferromagnetic material. Nishimura, K.; Komori, A.; Koide, Y.; Sato, N. // Review of Scientific Instruments;Oct88, Vol. 59 Issue 10, p2169 

    Formation of a straight helical magnetic field is attempted by using ferromagnetic material. A shaped ferromagnetic cylinder, which modifies an external uniform magnetic field, is demonstrated to realize an l=3 helical magnetic field that is suitable for plasma experiments. The measured values...

  • Magnetic and transport behaviors of La[sub 0.5](Sr[sub 0.53]Ca[sub 0.47])[sub 0.5]MnO[sub 3] under pressure, magnetic field, and Fe doping. Sun, J. R.; Liu, Z. X.; Yeung, C. F.; Chan, H. N.; Wong, H. K.; Li, R. W.; Shen, B. G. // Journal of Applied Physics;3/1/2002, Vol. 91 Issue 5, p3139 

    Effects of pressure, magnetic field, and Mn-site doping on the magnetic structure and resistive behavior of La[sub 0.5](Sr[sub 0.53]Ca[sub 0.47])[sub 0.5]Mn[sub 1 - χFe[sub χ (0≤ χ ≤ 0.10) have been experimentally studied. The system experiences two magnetic transitions...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics