具有动态电荷条纹的六硼化铅局部超导性

IF 1.4 4区物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY JETP Letters Pub Date : 2024-08-11 DOI:10.1134/S0021364024601696

A. N. Azarevich, A. V. Bogach, O. N. Khrykina, N. B. Bolotina, V. M. Gridchina, N. Yu. Shitsevalova, S. Yu. Gavrilkin, A. Yu. Tsvetkov, S. Gabáni, K. Flachbart, A. V. Kuznetsov, N. E. Sluchanko

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引用次数: 0

摘要

在 LaB6 中发现了 Tc ∼ 6 K 的第二类超导电性。确定了临界场，并得到了相干长度ξ(0) ∼ 240 Å、金兹堡-兰道参数κGL ∼ 2 和电子-声子耦合常数λe-ph ≈ 0.75 的估计值。在 T = 30 K 条件下进行的精密 X 射线衍射研究揭示了 LaB6 中的三维电荷条纹结构。讨论了在六硼化镧基体中产生的具有波动电子密度的丝状通道附近局部超导电性的情况。

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Localized Superconductivity in LaB6 Hexaboride with Dynamic Charge Stripes

Type II superconductivity with T_c ∼ 6 K is discovered in LaB₆. The critical fields are determined and the estimates for the coherence length ξ(0) ∼ 240 Å, the Ginzburg−Landau parameter κ_GL ∼ 2, and the electron–phonon coupling constant λ_e−ph ≈ 0.75 are obtained. Precision X-ray diffraction studies at T = 30 K reveal three-dimensional charge-stripe structures in LaB₆. The scenario of superconductivity localized near filamentary channels with a fluctuating electron density arising in the lanthanum hexaboride matrix is discussed.

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来源期刊

JETP Letters 物理-物理：综合

CiteScore

2.40

自引率

30.80%

发文量

164

审稿时长

3-6 weeks

期刊介绍： All topics of experimental and theoretical physics including gravitation, field theory, elementary particles and nuclei, plasma, nonlinear phenomena, condensed matter, superconductivity, superfluidity, lasers, and surfaces.