Patents by Inventor K M Masum Habib

K M Masum Habib has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Extremely large spin hall angle in topological insulator pn junction
    Patent number: 9865713
    Abstract: The interplay between chiral tunneling and spin-momentum locking of helical surface states leads to spin amplification and filtering in a 3D Topological Insulator (TI). Chiral tunneling across a TI pn junction allows normally incident electrons to transmit, while the rest are reflected with their spins flipped due to spin-momentum locking. The net result is that the spin current is enhanced while the dissipative charge current is simultaneously suppressed, leading to an extremely large, tunable longitudinal spin Hall angle (˜20) at the reflected end. At the transmitted end, the angle stays close to one and the electrons are completely spin polarized.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: January 9, 2018
    Assignee: UNIVERSITY OF VIRGINIA PATENT FOUNDATION
    Inventors: K. M. Masum Habib, Redwan Noor Sajjad, Avik Ghosh
  • EXTREMELY LARGE SPIN HALL ANGLE IN TOPOLOGICAL INSULATOR PN JUNCTION
    Publication number: 20160351696
    Abstract: The interplay between chiral tunneling and spin-momentum locking of helical surface states leads to spin amplification and filtering in a 3D Topological Insulator (TI). Chiral tunneling across a TI pn junction allows normally incident electrons to transmit, while the rest are reflected with their spins flipped due to spin-momentum locking. The net result is that the spin current is enhanced while the dissipative charge current is simultaneously suppressed, leading to an extremely large, tunable longitudinal spin Hall angle (˜20) at the reflected end. At the transmitted end, the angle stays close to one and the electrons are completely spin polarized.
    Type: Application
    Filed: September 30, 2015
    Publication date: December 1, 2016
    Inventors: K M Masum Habib, Redwan Noor Sajjad, Avik Ghosh