Kondo screening cloud in a superconductor with mixed s-wave and p-wave pairing states

Huang, Zhen-Zhen; Peng, Xiong-Tao; Wang, Wansheng; Sun, Jinhua

doi:10.1088/1674-1056/ac7213

Cited by 3 publications

(2 citation statements)

References 56 publications

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“…The variational method has been widely used in the ground states of Anderson impurity problems in normal metals, 47,48 systems with SOCs, 37,[49][50][51][52][53] and superconductors. [54][55][56][57] The HFQMC technique is a numerically exact method which has been used to study magnetic impurities in metals, 46,[58][59][60][61][62] dilute magnetic semiconductors, 63 graphene based systems [64][65][66][67] and in the presence of SOCs. 68,69 By combining the two methods, we can obtain not only a heuristic physical picture, but also the numerically exact results about the correlations.…”

Section: Introductionmentioning

confidence: 99%

Tunable correlation effects of magnetic impurities by the cubic Rashba spin-orbit couplings

Peng¹,

Lin²,

Chen³

et al. 2023

Preprint

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We theoretically study the influence of the k-cubic Rashba spin-orbit coupling (SOC) on the correlation effects of magnetic impurities by combining the variational method and the Hirsch-Fye quantum Monte Carlo (HFQMC) simulations. Markedly different from the normal k-linear Rashba SOC, even a small cubic Rashba term can greatly alter the band structure and induce a Van Hove singularity in a wide range of energy, thus the single impurity local moment becomes largely tunable. The cubic Rashba SOC adopted in this work breaks the rotational symmetry, but the host material is still invariant under the operations R z (π), IR z (π/2), Mxz, Myz, where R z (θ) is the rotation of angle θ about the z-axis, I is the inversion operator and Mxz (Myz) is the mirror reflection about the x-z (y-z) principal plane. Saliently, various components of spin-spin correlation between the single magnetic impurity and the conduction electrons show three-or sixfold rotational symmetry. This unique feature is due to the triple winding of the spins with a 2π rotation of k, which is a hallmark of the cubic Rashba effect, and can possibly be an identifier to distinguish the cubic Rashba SOC from the normal k-linear Rashba term in experiments. Although the cubic Rashba term drastically alters the electronic properties of the host, we find that the spatial decay rate of the spin-spin correlation function remains essentially unchanged. Moreover, the carrier-mediated Ruderman-Kittel-Kasuya-Yosida interactions between two magnetic impurities show twisted features, the ferromagnetic diagonal terms dominate when two magnetic impurities are very close, but the off-diagonal terms become important at long distances.

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Section: Introductionmentioning

confidence: 99%

Tunable correlation effects of magnetic impurities by the cubic Rashba spin-orbit couplings

Peng¹,

Lin²,

Chen³

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…In statistics mechanics, Wang and Huang present prominent studies on hydrodynamic metamaterials in porous media, non-porous media, creeping flows, and non-creeping flows from several perspectives. [28] Ding et al give a critical review of progress in thermal diodes and transistors, especially in the classical regime, followed by a brief introduction on new developing research directions such as topological phononics and quantum phononics. [29] In high pressure physics, Zhuang and Hu review the electronic conductivity and metallization of iron oxides under high-pressure conditions found in Earth's deep interiors.…”

mentioning

confidence: 99%