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Title: Y-shape spin-separator for two-dimensional group-IV nanoribbons based on quantum spin hall effect

An efficient spin-separator that operates in quantum spin hall phase has been investigated for two-dimensional group-IV materials. A three-terminal Y-shaped device has been simulated via non-equilibrium Green Function to demonstrate the separation of unpolarized current at source terminal into spin-polarized current of opposite polarity at the two drain terminals. Device controls, i.e., tunable buckling and perpendicular magnetic field have been modeled comprehensively to evaluate the device feasibility and performance. It is shown that these controls can preferentially steer current between the two drains to create a differential charge current with complementary spin polarization, thus enabling a convenient regulation of output signal.
Authors:
; ;  [1] ;  [2] ;  [3] ; ;  [4]
  1. Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117576 (Singapore)
  2. Graphene Research Centre and Department of Physics, National University of Singapore, Singapore 117542 (Singapore)
  3. Department of Physics, Northeastern University, Boston, Massachusetts 02115 (United States)
  4. Department of Physics, National Sun Yat-sen University, Kaohsiung 80424, Taiwan (China)
Publication Date:
OSTI Identifier:
22280588
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 3; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BUCKLING; COMPUTERIZED SIMULATION; ELECTRIC CURRENTS; GREEN FUNCTION; HAFNIUM; HALL EFFECT; MAGNETIC FIELDS; NANOSTRUCTURES; SPIN; SPIN ORIENTATION; TITANIUM; ZIRCONIUM