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Title: Colossal anisotropic absorption of spin currents induced by chirality

Journal Article · · Science Advances
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [2]; ORCiD logo [2];  [2];  [3]; ORCiD logo [3]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [5];  [6]; ORCiD logo [7]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [2]
  1. North Carolina State University, Raleigh, NC (United States); North Carolina State University
  2. North Carolina State University, Raleigh, NC (United States)
  3. University of Pittsburgh, PA (United States)
  4. Chinese Academy of Sciences, Beijing (China)
  5. Beijing Normal University (China)
  6. University of North Carolina at Chapel Hill, NC (United States)
  7. University of Illinois at Urbana-Champaign, IL (United States)

The chiral induced spin selectivity (CISS) effect, in which the structural chirality of a material determines the preference for the transmission of electrons with one spin orientation over that of the other, is emerging as a design principle for creating next-generation spintronic devices. CISS implies that the spin preference of chiral structures persists upon injection of pure spin currents and can act as a spin analyzer without the need for a ferromagnet. Here, we report an anomalous spin current absorption in chiral metal oxides that manifests a colossal anisotropic nonlocal Gilbert damping with a maximum-to-minimum ratio of up to 1000%. A twofold symmetry of the damping is shown to result from differential spin transmission and backscattering that arise from chirality-induced spin splitting along the chiral axis. These studies reveal the rich interplay of chirality and spin dynamics and identify how chiral materials can be implemented to direct the transport of spin current.

Research Organization:
North Carolina State University, Raleigh, NC (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0020992
OSTI ID:
2349513
Journal Information:
Science Advances, Journal Name: Science Advances Journal Issue: 18 Vol. 10; ISSN 2375-2548
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English

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