Xiaolong Feng

Observation of the amplified transverse thermoelectric signals by reduced-dimensionality transport anisotropy

Honghui Wang, Bin He, Xiaolong Feng, Haihua Hu et autres

Abstract Transverse thermoelectric devices offer simplified geometries with flexible designs for next-generation cryogenic technologies. However, mechanisms on geometrical amplification of transverse thermoelectric effects remain elusive. Here we establish a general framework linking reduced dimensionality with its geometrical anisotropy to enhanced transverse thermoelectric …

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Cooperative Goniopolar and Anomalous Nernst Transverse Thermoelectricity in Kagome Magnets

Honghui Wang, Xiaolong Feng, Haihua Hu, Xuemin Shi et autres

ABSTRACT Transverse thermoelectrics (TEs), enabling interconversion between orthogonal heat and electric currents, offers unique advantages in device geometry and design flexibility. Yet, achieving large transverse TE signals at room temperature remains challenging. Here, we establish a cooperative framework in which the goniopolar …

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Fermiology-driven goniopolar transverse thermoelectricity in kagome metals

Haihua Hu, Yiwei Ju, Erjian Cheng, Xiaolong Feng et autres

Abstract The exotic geometry of the kagome lattice drives emergent quantum states and advances energy technologies; however, the anomalous Nernst effect (ANE)-based magnetic systems are fundamentally limited by low thermopowers (<6μ V K −1 ) and stray-field interference. Here we propose goniopolarity …

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Efficient spin-pumping and spin transport across epitaxial Mn3Sn(0001) noncollinear antiferromagnet/permalloy interfaces

Surya N. Panda, Ning Mao, Nikolai Peshcherenko, Xiaolong Feng et autres

Abstract The generation and control of spin currents are crucial for advancing next-generation spintronic technologies. These technologies depend on materials capable of efficiently sourcing and interconverting spin and charge currents, while overcoming some limitations associated with conventional ferromagnets and heavy metals. Kagome …

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CCDC 2415705: Experimental Crystal Structure Determination

Hanqing Zeng, Beiquan Jia, Xiaolong Feng, Jiaxue You et autres

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, …

Study on Influencing Factors of Calendar Aging and Cycle Aging of LFP Batteries

Zhihao Yang, Xue Li, Jinhan Li, Hao Li et autres

Lithium iron phosphate (LFP) batteries are widely deployed in electric vehicles and large-scale energy storage systems due to their low cost, high safety, and excellent cycling stability. However, long-term operation introduces aging phenomena that critically limit performance and lifetime. In this study, …

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Modeling the Coupled Stress Relaxation and SEI Evolution in Preload-Constrained Lithium-Ion Cells

Jinhan Li, Xue Li, Zhihao Yang, Hao Li et autres

This work investigates the role of preload pressure in governing the electro-chemo-mechanical (ECM) behavior of lithium iron phosphate (LFP)/graphite pouch cells during calendar aging. Cells aged at 60 °C under different preload levels were systematically evaluated through in situ monitoring of force …

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The influence of heavy valence band in Bi88Sb12

Bin He, Haiyao Hu, Xiaolong Feng, Claudia Felser

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Interlayer Charge Transfer Induced by Electronic Instabilities in the Natural van der Waals Heterostructure 4 H b − TaS 2

R. Mathew Roy, Xiaolong Feng, M. Wenzel, Vicky Hasse et autres

The natural van der Waals heterostructure 4H_{b}-TaS_{2} composed of alternating 1T- and 1H-TaS_{2} layers serves as a platform for investigating the electronic correlations and layer-dependent properties of novel quantum materials. The temperature evolution of the conductivity spectra σ(ω) obtained through infrared spectroscopy …

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Orbital-selective band modifications in a charge-ordered kagome metal LuNb$_6$Sn$_6$

Rui Lou, Yumeng Zhang, Erjian Cheng, Xiaolong Feng et autres

The origin of the charge order in kagome lattice materials has attracted great interest due to the unique electronic structure features connected to kagome networks and the interplay between electron and lattice degrees of freedom. Recently, compounds with composition $Ln$Nb$_6$Sn$_6$ ($Ln$ = …

Flat phonon soft modes and unconventional charge density wave formation in ScV 6 Sn 6 : Microscopic and effective theory

Haoyu Hu, Y. Jiang, Dumitru Călugăru, Xiaolong Feng et autres

Kagome materials with flat bands exhibit wildly different physical properties depending on symmetry group and electron number. We analyze the case of the kagome 166 material ${\mathrm{ScV}}_{6}{\mathrm{Sn}}_{6}$ in symmetry group 191, with the Fermi level away from the flat bands. Experimentally, an …

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Multipocket synergy towards high thermoelectric performance in topological semimetal TaAs2

Xiaolong Feng, Yu Pan, Vicky Hasse, Honghui Wang et autres

Abstract Charge-carrier compensation in topological semimetals amplifies the Nernst signal and simultaneously degrades the Seebeck coefficient. In this study, we report the simultaneous achievement of both a large Nernst signal and an unsaturating magneto-Seebeck coefficient in a topological nodal-line semimetal TaAs2 single …

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