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Title: Manipulating chiral spin transport with ferroelectric polarization

Journal Article · · Nature Materials
ORCiD logo [1]; ORCiD logo [2];  [3];  [4]; ORCiD logo [1];  [5];  [1]; ORCiD logo [1];  [1]; ORCiD logo [6]; ORCiD logo [7]; ORCiD logo [8]; ORCiD logo [1];  [1]; ORCiD logo [9]; ORCiD logo [1]; ORCiD logo [2];  [1];  [9]; ORCiD logo [8] more »; ORCiD logo [1]; ORCiD logo [10]; ORCiD logo [11]; ORCiD logo [9]; ORCiD logo [12]; ORCiD logo [5];  [13]; ORCiD logo [2]; ORCiD logo [14]; ORCiD logo [15]; ORCiD logo [3]; ORCiD logo [9]; ORCiD logo [2] « less
  1. Univ. of California, Berkeley, CA (United States)
  2. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  3. Univ. of California, Riverside, CA (United States)
  4. Luxembourg Institute of Science and Technology (Luxembourg)
  5. Cornell Univ., Ithaca, NY (United States)
  6. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Arizona State Univ., Tempe, AZ (United States)
  7. Kavli Institute at Cornell for Nanoscale Science, Ithaca, NY (United States)
  8. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  9. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  10. Politecnico di Bari (Italy)
  11. Argonne National Laboratory (ANL), Argonne, IL (United States); Seagate Technology, Bloomington, MN (United States)
  12. Luxembourg Institute of Science and Technology (Luxembourg); Univ. of Luxembourg, Belvaux, (Luxembourg)
  13. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
  14. Univ. of California, Berkeley, CA (United States); Canadian Institute for Advanced Research (CIFAR), Toronto, ON (Canada). Quantum Materials
  15. Cornell Univ., Ithaca, NY (United States); Kavli Institute at Cornell for Nanoscale Science, Ithaca, NY (United States)

A magnon is a collective excitation of the spin structure in a magnetic insulator and can transmit spin angular momentum with negligible dissipation. This quantum of a spin wave has always been manipulated through magnetic dipoles (that is, by breaking time-reversal symmetry). Here we report the experimental observation of chiral spin transport in multiferroic BiFeO3 and its control by reversing the ferroelectric polarization (that is, by breaking spatial inversion symmetry). The ferroelectrically controlled magnons show up to 18% modulation at room temperature. The spin torque that the magnons in BiFeO3 carry can be used to efficiently switch the magnetization of adjacent magnets, with a spin-torque efficiency comparable to the spin Hall effect in heavy metals. Utilizing such controllable magnon generation and transmission in BiFeO3, an all-oxide, energy-scalable logic is demonstrated composed of spin-orbit injection, detection and magnetoelectric control. In conclusion, our observations open a new chapter of multiferroic magnons and pave another path towards low-dissipation nanoelectronics.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
US Air Force Office of Scientific Research (AFOSR); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)
Grant/Contract Number:
AC02-05CH11231; SC0017671
OSTI ID:
2472558
Journal Information:
Nature Materials, Journal Name: Nature Materials Journal Issue: 7 Vol. 23; ISSN 1476-1122
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English

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