Giant effect of spin–lattice coupling on the thermal transport in two-dimensional ferromagnetic CrI3

2020 ◽  
Vol 8 (10) ◽  
pp. 3520-3526 ◽  
Author(s):  
Guangzhao Qin ◽  
Huimin Wang ◽  
Lichuan Zhang ◽  
Zhenzhen Qin ◽  
Ming Hu
Keyword(s):  
Thermal Conductivity ◽  
Thermal Transport ◽  
Magnetic Storage ◽  
Two Dimensional ◽  
Spin Lattice ◽  
Lattice Coupling

The thermal conductivity of monolayer CrI3 is enlarged more than two orders of magnitude by the spin–lattice coupling, which would be large enough for its applications in nanoelectronics and magnetic storage.

Nature of spin-lattice coupling in two-dimensional CrI3 and CrGeTe3

2021 ◽  
Vol 64 (8) ◽  
Author(s):  
Jing Li ◽  
JunSheng Feng ◽  
PanShuo Wang ◽  
ErJun Kan ◽  
HongJun Xiang
Keyword(s):  
Two Dimensional ◽  
Spin Lattice ◽  
Lattice Coupling

The thermal conductivity of Ni 2 + doped KMgF 3 in a magnetic field at low temperatures: the effect of single ions and coupled pairs

1970 ◽  
Vol 315 (1523) ◽  
pp. 551-568 ◽  
Keyword(s):  
Magnetic Field ◽  
Thermal Conductivity ◽  
Elastic Constants ◽  
Low Temperatures ◽  
Coupling Constants ◽  
Thermal Resistivity ◽  
Paramagnetic Resonance ◽  
Spin Lattice ◽  
Average Spin ◽  
Lattice Coupling

The thermal conductivity between 0.4 and 4.2 K and in magnetic fields up to 50 kOe of KMgF 3 doped with Ni 2+ has been measured. The results are analysed to give values of the average spin-lattice coupling constants ( x Sl ) for the Ni 2+ ion. These are in agreement with values calculated using the magneto-elastic constants (GX1 and 6r44) derived from acoustic paramagnetic resonance (a.p.r.) experiments. Below IK the thermal resistivity as a function of magnetic field shows a number of anomalies, for which possible causes are discussed; it is concluded that they result from phonon interactions with exchange-coupled pairs of Ni 2+ ions. Such pairs are also observed in a.p.r. experiments.

Monolayer and bilayer polyaniline C3N: two-dimensional semiconductors with high thermal conductivity

Nanoscale ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 4301-4310 ◽  
Author(s):  
Yang Hong ◽  
Jingchao Zhang ◽  
Xiao Cheng Zeng
Keyword(s):  
Thermal Conductivity ◽  
Thermal Transport ◽  
Md Simulation ◽  
Transport Processes ◽  
High Thermal Conductivity ◽  
Two Dimensional

Lateral and flexural thermal transport processes in monolayer and bilayer C3N are systematically investigated using MD simulation.

scholarly journals Lattice thermal transport in two-dimensional alloys and fractal heterostructures

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Aravind Krishnamoorthy ◽  
Nitish Baradwaj ◽  
Aiichiro Nakano ◽  
Rajiv K. Kalia ◽  
Priya Vashishta
Keyword(s):  
Thermal Conductivity ◽  
Thermal Transport ◽  
Lattice Thermal Conductivity ◽  
Material Design ◽  
Two Dimensional ◽  
Scale Free ◽  
Dopant Atoms ◽  
Non Equilibrium Molecular Dynamics ◽  
Dynamics Simulations ◽  
The Impact

AbstractEngineering thermal transport in two dimensional materials, alloys and heterostructures is critical for the design of next-generation flexible optoelectronic and energy harvesting devices. Direct experimental characterization of lattice thermal conductivity in these ultra-thin systems is challenging and the impact of dopant atoms and hetero-phase interfaces, introduced unintentionally during synthesis or as part of deliberate material design, on thermal transport properties is not understood. Here, we use non-equilibrium molecular dynamics simulations to calculate lattice thermal conductivity of $${\mathrm {(Mo|W)Se_2}}$$ ( Mo | W ) Se 2 monolayer crystals including $${\mathrm {Mo}}_{1-x}{\mathrm {W}}_x{\mathrm {Se_2}}$$ Mo 1 - x W x Se 2 alloys with substitutional point defects, periodic $${\mathrm {MoSe_2}|\mathrm {WSe_2}}$$ MoSe 2 | WSe 2 heterostructures with characteristic length scales and scale-free fractal $${\mathrm {MoSe_2}}|{\mathrm {WSe_2}}$$ MoSe 2 | WSe 2 heterostructures. Each of these features has a distinct effect on phonon propagation in the crystal, which can be used to design fractal and periodic alloy structures with highly tunable thermal conductivities. This control over lattice thermal conductivity will enable applications ranging from thermal barriers to thermoelectrics.

scholarly journals HexagonalRMnO3: a model system for two-dimensional triangular lattice antiferromagnets

2016 ◽  
Vol 72 (1) ◽  
pp. 3-19 ◽  
Author(s):  
Hasung Sim ◽  
Joosung Oh ◽  
Jaehong Jeong ◽  
Manh Duc Le ◽  
Je-Geun Park
Keyword(s):  
Triangular Lattice ◽  
Nearest Neighbor ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Model System ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
Spin Lattice ◽  
Lattice Coupling ◽  
Coherent Picture

The hexagonalRMnO3(h-RMnO3) are multiferroic materials, which exhibit the coexistence of a magnetic order and ferroelectricity. Their distinction is in their geometry that both results in an unusual mechanism to break inversion symmetry and also produces a two-dimensional triangular lattice of Mn spins, which is subject to geometrical magnetic frustration due to the antiferromagnetic interactions between nearest-neighbor Mn ions. This unique combination makes theh-RMnO3a model system to test ideas of spin-lattice coupling, particularly when both the improper ferroelectricity and the Mn trimerization that appears to determine the symmetry of the magnetic structure arise from the same structure distortion. In this review we demonstrate how the use of both neutron and X-ray diffraction and inelastic neutron scattering techniques have been essential to paint this comprehensive and coherent picture ofh-RMnO3.

Effects of hydrostatic pressure on spin-lattice coupling in two-dimensional ferromagnetic Cr2Ge2Te6

2018 ◽  
Vol 112 (7) ◽  
pp. 072409 ◽  
Author(s):  
Y. Sun ◽  
R. C. Xiao ◽  
G. T. Lin ◽  
R. R. Zhang ◽  
L. S. Ling ◽  
...  
Keyword(s):  
Hydrostatic Pressure ◽  
Two Dimensional ◽  
Spin Lattice ◽  
Lattice Coupling

Doping dependence of spin-lattice coupling and two-dimensional ordering in multiferroic hexagonalY1−xLuxMnO3(0≤x≤1)

2010 ◽  
Vol 82 (5) ◽  
Author(s):  
Junghwan Park ◽  
Seongsu Lee ◽  
Misun Kang ◽  
Kwang-Hyun Jang ◽  
Changhee Lee ◽  
...  
Keyword(s):  
Two Dimensional ◽  
Doping Dependence ◽  
Spin Lattice ◽  
Lattice Coupling

Electron–Phonon and Spin–Lattice Coupling in Atomically Thin Layers of MnBi2Te4

Nano Letters ◽  
2021 ◽  
Author(s):  
Jeongheon Choe ◽  
David Lujan ◽  
Martin Rodriguez-Vega ◽  
Zhipeng Ye ◽  
Aritz Leonardo ◽  
...  
Keyword(s):  
Thin Layers ◽  
Spin Lattice ◽  
Lattice Coupling

scholarly journals Fluorine intercalated graphene: Formation of a two-dimensional spin lattice through pseudoatomization

2020 ◽  
Vol 4 (7) ◽  
Author(s):  
Shashi B. Mishra ◽  
Satyesh K. Yadav ◽  
D. G. Kanhere ◽  
B. R. K. Nanda
Keyword(s):  
Two Dimensional ◽  
Spin Lattice

scholarly journals Decoupling electron and phonon transport in single-nanowire hybrid materials for high-performance thermoelectrics

2021 ◽  
Vol 7 (20) ◽  
pp. eabe6000
Author(s):  
Lin Yang ◽  
Madeleine P. Gordon ◽  
Akanksha K. Menon ◽  
Alexandra Bruefach ◽  
Kyle Haas ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermal Transport ◽  
Electrical Transport ◽  
High Performance ◽  
Figure Of Merit ◽  
Phonon Transport ◽  
Core Shell ◽  
Nanowire Diameter ◽  
High Performing ◽  
Polycrystalline Thin Films

Organic-inorganic hybrids have recently emerged as a class of high-performing thermoelectric materials that are lightweight and mechanically flexible. However, the fundamental electrical and thermal transport in these materials has remained elusive due to the heterogeneity of bulk, polycrystalline, thin films reported thus far. Here, we systematically investigate a model hybrid comprising a single core/shell nanowire of Te-PEDOT:PSS. We show that as the nanowire diameter is reduced, the electrical conductivity increases and the thermal conductivity decreases, while the Seebeck coefficient remains nearly constant—this collectively results in a figure of merit, ZT, of 0.54 at 400 K. The origin of the decoupling of charge and heat transport lies in the fact that electrical transport occurs through the organic shell, while thermal transport is driven by the inorganic core. This study establishes design principles for high-performing thermoelectrics that leverage the unique interactions occurring at the interfaces of hybrid nanowires.

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