On the nature of inhomogeneous weak localization of charge carriers in the heavy fermion compound CeB6

doi:10.1088/1674-1056/adfbdd

中国物理B ›› 2026, Vol. 35 ›› Issue (3): 37202-037202.doi: 10.1088/1674-1056/adfbdd

On the nature of inhomogeneous weak localization of charge carriers in the heavy fermion compound CeB₆

A N Azarevich¹, A V Bogach¹, O N Khrykina², N B Bolotina², V M Gridchina², S Yu Gavrilkin³, A Yu Tsvetkov³, V V Voronov¹, K Flachbart⁴, S Gabani⁴, and N E Sluchanko^1,†

1 Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia;
2 Kurchatov Complex of Crystallography and Photonics, National Research Center Kurchatov Institute, Moscow, Russia;
3 Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, Russia;
4 Institute of Experimental Physics of the Slovak Academy of Sciences, Košice, Slovakia

收稿日期:2025-05-17 修回日期:2025-07-04 接受日期:2025-08-15 出版日期:2026-02-11 发布日期:2026-03-03
通讯作者: N E Sluchanko E-mail:nes@lt.gpi.ru
基金资助:
S.G. and K.F. acknowledge the support of the Slovak Research and Development Agency under contract No. APVV-23-0226 and VEGA 2/0034/24. The work was partly performed using the equipment of the Shared Research Centers of the Kurchatov Complex of ‘Crystallography and Photonics’ of NRC Kurchatov Institute and Lebedev Physical Institute of RAS. The work of O.N. Khrykina, N.B. Bolotina and V.M. Gridchina in the part of structural analysis was performed within the framework of the State Assignment of NRC ‘Kurchatov Institute’. The authors are grateful to S.V. Demishev and V.V. Glushkov for useful discussions.

On the nature of inhomogeneous weak localization of charge carriers in the heavy fermion compound CeB₆

A N Azarevich¹, A V Bogach¹, O N Khrykina², N B Bolotina², V M Gridchina², S Yu Gavrilkin³, A Yu Tsvetkov³, V V Voronov¹, K Flachbart⁴, S Gabani⁴, and N E Sluchanko^1,†

1 Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia;
2 Kurchatov Complex of Crystallography and Photonics, National Research Center Kurchatov Institute, Moscow, Russia;
3 Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, Russia;
4 Institute of Experimental Physics of the Slovak Academy of Sciences, Košice, Slovakia

Received:2025-05-17 Revised:2025-07-04 Accepted:2025-08-15 Online:2026-02-11 Published:2026-03-03
Contact: N E Sluchanko E-mail:nes@lt.gpi.ru
Supported by:
S.G. and K.F. acknowledge the support of the Slovak Research and Development Agency under contract No. APVV-23-0226 and VEGA 2/0034/24. The work was partly performed using the equipment of the Shared Research Centers of the Kurchatov Complex of ‘Crystallography and Photonics’ of NRC Kurchatov Institute and Lebedev Physical Institute of RAS. The work of O.N. Khrykina, N.B. Bolotina and V.M. Gridchina in the part of structural analysis was performed within the framework of the State Assignment of NRC ‘Kurchatov Institute’. The authors are grateful to S.V. Demishev and V.V. Glushkov for useful discussions.

1. 2026-037202-SI.pdf(301KB)

摘要/Abstract

摘要： Fine details of the electron density distribution in the heavy fermion metal CeB$_{6}$ have been studied for the first time by precision x-ray diffraction experiments in the temperature range of 30-500 K. At temperatures between 30 K and 80 K, the formation of dynamic charge stripes along the $\langle 100\rangle$ axes is observed in B$_{6}$ clusters, corresponding to gapless (weak) localization of charge carriers. Based on the achieved results, we assume that the spin-polarized 5d-2p electronic states in the conduction band are partially localized within these charge stripes and between vibrationally coupled Ce-Ce pairs. Moreover, results of thermal conductivity, heat capacity, Seebeck coefficient and resistivity measurements indicate a significant role of polaron-phonon scattering, which causes inhomogeneous weak localization of charge carriers in CeB$_{6}$.

关键词: weak localization, dynamic charge stripes, heavy fermions

Abstract: Fine details of the electron density distribution in the heavy fermion metal CeB$_{6}$ have been studied for the first time by precision x-ray diffraction experiments in the temperature range of 30-500 K. At temperatures between 30 K and 80 K, the formation of dynamic charge stripes along the $\langle 100\rangle$ axes is observed in B$_{6}$ clusters, corresponding to gapless (weak) localization of charge carriers. Based on the achieved results, we assume that the spin-polarized 5d-2p electronic states in the conduction band are partially localized within these charge stripes and between vibrationally coupled Ce-Ce pairs. Moreover, results of thermal conductivity, heat capacity, Seebeck coefficient and resistivity measurements indicate a significant role of polaron-phonon scattering, which causes inhomogeneous weak localization of charge carriers in CeB$_{6}$.

Key words: weak localization, dynamic charge stripes, heavy fermions

中图分类号: (Localization effects (Anderson or weak localization))

72.15.Rn

72.15.Qm (Scattering mechanisms and Kondo effect) 71.27.+a (Strongly correlated electron systems; heavy fermions)

A N Azarevich, A V Bogach, O N Khrykina, N B Bolotina, V M Gridchina, S Yu Gavrilkin, A Yu Tsvetkov, V V Voronov, K Flachbart, S Gabani, and N E Sluchanko. On the nature of inhomogeneous weak localization of charge carriers in the heavy fermion compound CeB₆[J]. 中国物理B, 2026, 35(3): 37202-037202.

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On the nature of inhomogeneous weak localization of charge carriers in the heavy fermion compound CeB₆

On the nature of inhomogeneous weak localization of charge carriers in the heavy fermion compound CeB₆

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