Chirality enables thermal magnon transistors

Yu, Tao; Cai, Chengyuan; Bauer, Gerrit E. W.

doi:10.1007/s11433-023-2294-1

Sci. China Phys. Mech. Astron.

2024

DOI: 10.1007/s11433-023-2294-1

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Chirality enables thermal magnon transistors

Tao Yu,

Chengyuan Cai,

Gerrit E. W. Bauer

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2024

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Cited by 3 publications

References 46 publications

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A Homochiral Hexagadolinium Phosphonate Cluster: Structure, Chiral Electrochemical Recognition and a Large Magnetocaloric Effect

Qian,

Huang,

Jia

et al. 2024

Eur J Inorg Chem

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Chiral lanthanide clusters have promising applications in chiral recognition, magneto‐optical memories, and spintronic devices. Nonetheless, the precise prediction and controlled development of homochiral polynuclear Ln‐complexes is still a challenge. Herein, through multidentate chelate synthetic strategy, a new homochiral hexagadolinium phosphonate cluster designated as R/S‐[Gd6(pmhpH)8(NO3)2(H2O)8]·19H2O (R/S‐1) was successfully obtained by reacting chiral phosphonomethylhomoproline(pmhpH3) with Gd(III) salt. The cluster, shaped like a lantern, is constructed from {GdO8} polyhedra and {PO3C} tetrahedra surrounded by eight pmhpH2‐ ligands. Within the structure, two types of gadolinium ions with different coordination modes are observed. Each Gd(III) ion is bound to two carboxylate oxygens and six phosphonate oxygens from the coordinated pmhpH2‐ ligands. Circular dichroism spectra comfirmed that R/S‐1 exists as a pair of enantiomers. Moreover, the cluster exhibits high thermal stability, decomposing at temperatures exceeding 335 °C. Notably, the chiral cluster materials can be used for enantiomeric recognition for tryptophan (Trp) with the differential pulse voltammetry (DPV) peak current ratio (ID/IL) 2.74. Besides, the magnetic measurements revealed that compound R‐1 exhibits a good magnetocaloric effect (MCE) with a maximum entropy change of −ΔSmmax =36.84 Jkg−1 K−1 at T = 2K and ΔH = 7 T.

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A Homochiral Hexagadolinium Phosphonate Cluster: Structure, Chiral Electrochemical Recognition and a Large Magnetocaloric Effect

Qian,

Huang,

Jia

et al. 2024

Eur J Inorg Chem

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A nonvolatile magnon field effect transistor at room temperature

Cheng,

Yu,

Sun

et al. 2024

Nat Commun

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Information industry is one of the major drivers of the world economy. Its rapid growth, however, leads to severe heat problem which strongly hinders further development. This calls for a non-charge-based technology. Magnon, capable of transmitting spin information without electron movement, holds tremendous potential in post-Moore era. Given the cornerstone role of the field effect transistor in modern electronics, creating its magnonic equivalent is highly desired but remains a challenge. Here, we demonstrate a nonvolatile three-terminal lateral magnon field effect transistor operating at room temperature. The device consists of a ferrimagnetic insulator (Y 3 Fe 5 O 12 ) deposited on a ferroelectric material [Pb(Mg 1/3 Nb 2/3 ) 0.7 Ti 0.3 O 3 or Pb(Zr 0.52 Ti 0.48 )O 3 ], with three Pt stripes patterned on Y 3 Fe 5 O 12 as the injector, gate, and detector, respectively. The magnon transport in Y 3 Fe 5 O 12 can be regulated by the gate voltage pulses in a nonvolatile manner with a high on/off ratio. Our findings provide a solid foundation for designing energy-efficient magnon-based devices.

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Nonreciprocal transport of thermally generated magnons

Cosset-Chéneau,

Tirion,

Wei

et al. 2024

Phys. Rev. B

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We demonstrate the nonreciprocity of electrically and thermally generated incoherent magnon transport using the magnetization direction of a Py wire placed on top of an ultrathin YIG film. We show that the transport properties of thermally generated magnons under a Py wire depend on the relative orientation between the temperature gradient and the Py-magnetization direction. The symmetries of this nonreciprocal magnon transport match with those predicted by the remote dipolar interaction between YIG and Py magnons, controlled by the chirality of the YIG magnon dipolar stray fields. We also show that the directional magnon generation by the spin Seebeck effect from the Py wire displays the symmetries expected from the chiral spin Seebeck effect. Published by the American Physical Society 2024

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Chirality enables thermal magnon transistors

Cited by 3 publications

References 46 publications

A Homochiral Hexagadolinium Phosphonate Cluster: Structure, Chiral Electrochemical Recognition and a Large Magnetocaloric Effect

A Homochiral Hexagadolinium Phosphonate Cluster: Structure, Chiral Electrochemical Recognition and a Large Magnetocaloric Effect

A nonvolatile magnon field effect transistor at room temperature

Nonreciprocal transport of thermally generated magnons

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