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Chemically and electrically tunable spin polarization in ferroelectric Cd-based hybrid organic-inorganic perovskites

Journal Article · · Physical Review. B
 [1];  [2];  [3];  [4];  [3]
  1. University of South Florida, Tampa, FL (United States); OSTI
  2. University of South Florida, Tampa, FL (United States); Bhabha Atomic Research Centre, Mumbai (India)
  3. University of South Florida, Tampa, FL (United States)
  4. Indian Institute of Technology Madras, Chennai (India)
Density functional theory computations are used to predict the electronic structure of Cd-based hybrid organic-inorganic high-TC ferroelectric perovskites with TMCM-CdCl3 being one representative. Here we report Rashba-Dresselhaus spin splitting in the valence band of these nonmagnetic compounds. Interestingly, we find in computations that the splitting is not necessarily sensitive to the polarization of the material but to the organic molecule itself which opens a way to its chemical tunability through the choice of the molecule. Further chemical tunability of spin splitting is shown to be possible through a substitution of Cl in the CdCl3 chains as the valence band was found to originate from Cl-Cl weekly bonding orbitals. For example, the substitution of Cl with Br in TMCM-CdCl3 resulted in a ten times increase of spin splitting. Furthermore, the spin polarization in these materials gives origin to persistent spin textures which are coupled to the polarization direction, and, therefore, can be controlled by the electric field. This is promising for spintronics applications.
Research Organization:
University of South Florida, Tampa, FL (United States)
Sponsoring Organization:
Department Of Science & Technology (DST); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)
Grant/Contract Number:
SC0005245
OSTI ID:
1979691
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Journal Issue: 23 Vol. 104; ISSN 2469-9950; ISSN PRBMDO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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