Giant room-temperature spin caloritronics in spin-semiconducting graphene nanoribbons
نویسندگان
چکیده
Xiaobin Chen,1 Yizhou Liu,1 Bing-Lin Gu,1,2,3 Wenhui Duan,1,2,3,* and Feng Liu1,2,4,† 1Department of Physics and State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Beijing 100084, China 2Collaborative Innovation Center of Quantum Matter, Beijing 100084, China 3Institute for Advanced Study, Tsinghua University, Beijing 100084, China 4Department of Materials Science and Engineering, University of Utah, Salt Lake City, Utah 84112, USA (Received 21 April 2014; revised manuscript received 9 September 2014; published 22 September 2014)
منابع مشابه
Spin Seebeck Effect and Thermal Colossal Magnetoresistance in Graphene Nanoribbon Heterojunction
Spin caloritronics devices are very important for future development of low-power-consumption technology. We propose a new spin caloritronics device based on zigzag graphene nanoribbon (ZGNR), which is a heterojunction consisting of single-hydrogen-terminated ZGNR (ZGNR-H) and double-hydrogen-terminated ZGNR (ZGNR-H2). We predict that spin-up and spin-down currents flowing in opposite direction...
متن کاملSpin-polarized transport through a zigzag-edge graphene flake embedded between two armchair nanoribbons electrodes
We study the coherent spin-polarized transport through a zigzag-edge graphene flake (ZGF), using Hubbard model in the nearest neighbor approximation within the framework of the Green function’s technique and Landauer formalism. The system considered consists of electrode/ (ZGF)/electrode, in which the electrodes are chosen to be armchair nanoribbons. The study was performed for two types of ele...
متن کاملSpatially separated spin carriers in spin-semiconducting graphene nanoribbons.
A graphene nanoribbon with sawtooth edges has a ferromagnetic ground state. Using first-principles and tight-binding model calculations, we show that, under a transverse electrical field, the sawtooth graphene nanoribbons become a spin semiconductor whose charge carriers are not only spin polarized in energy space but also spatially separated at different edges. Low-energy excitation produces s...
متن کاملEdge-functionalized and substitutionally doped graphene nanoribbons: Electronic and spin properties
Graphene nanoribbons are the counterpart of carbon nanotubes in graphene-based nanoelectronics. We investigate the electronic properties of chemically modified ribbons by means of density functional theory. We observe that chemical modifications of zigzag ribbons can break the spin degeneracy. This promotes the onset of a semiconducting-metal transition, or of a half-semiconducting state, with ...
متن کاملSemiconducting 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 کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2014