Triplon current generation in solids

Abstract

A triplon refers to a fictitious particle that carries angular momentum $S=1$ corresponding to the elementary excitation in a broad class of quantum dimerized spin systems. Such systems without magnetic order have long been studied as a testing ground for quantum properties of spins. Although triplons have been found to play a central role in thermal and magnetic properties in dimerized magnets with singlet correlation, a spin angular momentum flow carried by triplons, a triplon current, has not been detected yet. Here we report spin Seebeck effects induced by a triplon current: triplon spin Seebeck effect, using a spin-Peierls system CuGeO${}_3$. The result shows that the heating-driven triplon transport induces spin current whose sign is positive, opposite to the spin-wave cases in magnets. The triplon spin Seebeck effect persists far below the spin-Peierls transition temperature, being consistent with a theoretical calculation for triplon spin Seebeck effects.

References in corpus (14)

• Time-dependent transport in interacting and non-interacting mesoscopic systems
• Direct electronic measurement of the spin Hall effect
• Long distance transport of magnon spin information in a magnetic insulator at room temperature
• Antiferromagnetic spin Seebeck Effect
• Thermal generation of spin current in an antiferromagnet
• Critical suppression of spin Seebeck effect by magnetic fields
• Observation of spin current in quantum spin liquid
• New phase diagram of Zn-doped CuGeO3
• Spin Seebeck effect in the layered ferromagnetic insulators CrSiTe${}_3$ and CrGeTe${}_3$
• Paramagnetic spin pumping
• Efficient spin transport in a paramagnetic insulator
• Coefficients of bosonized dimer operators in spin-1/2 XXZ chains and their applications
• Neutron scattering study of the field-induced soliton lattice in CuGeO${}_3$
• Magnon Pairs and Spin-Nematic Correlation in the Spin-Seebeck Effect

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• Microscopic theory of spin Seebeck effect in antiferromagnets
• Spin Seebeck Effect as a Probe for Majorana Fermions in Kitaev Spin Liquids
• Dynamical phase transition in a strongly hybridized phonon-triplon chain
• Cryogenic spin Peltier effect detected by a RuO${}_2$-AlO${}_x$ on-chip microthermometer
• Signature of BKT-like spin transport in a quasi-2D antiferromagnet BaNi${}_2$V${}_2$O${}_8$
• Low temperature spin Seebeck effect in non-magnetic vanadium dioxide
• Spin Seebeck effect in two-sublattice ferrimagnets in the vicinity of $T_{\mathrm{C}}$
• Spin Seebeck effect of interacting spinons
• Phase diagram of the J1-J2 Heisenberg second-order topological quantum magnet
• Spin caloritronics: History and future prospects of experiments
• Spin Seebeck Effect in Correlated Antiferromagnetic V2O3
• Spin Seebeck in the weak exchange coupled van der Waals antiferromagnet