Crystal growth and properties of the non-centrosymmetric superconductor, Ru7B3

Singh, R. P.; Parzyk, N.; Lees, Martin R.; Paul, D. McK.

doi:10.1016/j.jcrysgro.2014.03.003

Cited by 10 publications

(9 citation statements)

References 14 publications

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“…arXiv:1810.03876v1 [cond-mat.supr-con] 9 Oct 2018 It forms a NCS crystal structure with the space group P 6 3 mc [35], which is hexagonal in the basal plane. Our single-crystal sample has a superconducting transition temperature of T c = 2.6 K [36], which sits within the range of 2.5 to 3.4 K observed in earlier studies [37][38][39]. It is reported to have an isotropic s-wave gap [38], rather than the singlet-triplet mixture predicted for NCS superconductors.…”

Section: Introductionsupporting

confidence: 77%

Rotation of the magnetic vortex lattice in Ru7B3 driven by the effects of broken time-reversal and inversion symmetry

et al. 2019

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We observe a hysteretic reorientation of the magnetic vortex lattice in the noncentrosymmetric superconductor Ru7B3, with the change in orientation driven by altering magnetic field below Tc. Normally a vortex lattice chooses either a single or degenerate set of orientations with respect to a crystal lattice at any given field or temperature, a behavior well described by prevailing phenomenological and microscopic theories. Here, in the absence of any typical VL structural transition, we observe a continuous rotation of the vortex lattice which exhibits a pronounced hysteresis and is driven by a change in magnetic field. We propose that this rotation is related to the spontaneous magnetic fields present in the superconducting phase, which are evidenced by the observation of time-reversal symmetry breaking, and the physics of broken inversion symmetry. Finally, we develop a model from the Ginzburg-Landau approach which shows that the coupling of these to the vortex lattice orientation can result in the rotation we observe.

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Section: Introductionsupporting

confidence: 77%

Rotation of the magnetic vortex lattice in Ru7B3 driven by the effects of broken time-reversal and inversion symmetry

et al. 2019

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“…Almost three decades later, the absence of the inversion symmetry in its crystal structure was highlighted by Morniroli et al 22 . In various transport and thermodynamic measurements in the past 23 – 25 , it was seen that and 2 ) in Ru B were approximately 1.4 and 3.3, respectively, indicating a weak-coupling superconducting state. These measurements also indirectly indicated that a predominant fully gapped s -wave order parameter could describe the superconducting state of Ru B well.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic evidence of mixed angular momentum symmetry in non-centrosymmetric Ru$$_7$$B$$_3$$

Datta

Vasdev

Ramachandran

et al. 2021

Sci Rep

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Superconducting crystals with a lack of inversion symmetry can potentially host unconventional pairing. However, till today, no direct conclusive experimental evidence of such unconventional order parameters in non-centrosymmetric superconductors has been reported. In this paper, through direct measurement of the superconducting energy gap by scanning tunnelling spectroscopy, we report the existence of both s-wave (singlet) and p-wave (triplet) pairing symmetries in non-centrosymmetric Ru$$_7$$ 7 B$$_3$$ 3 . Our temperature and magnetic field-dependent studies also indicate that the relative amplitudes of the singlet and triplet components change differently with temperature.

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“…Almost three decades later, the absence of the inversion symmetry in its crystal structure was highlighted by Morniroli et al [22]. In various transport and thermodynamic measurements in the past [23][24][25], it was seen that ∆C e /(γ n T c ) and 2∆ 0 /(k B T c ) in Ru 7 B 3 were approximately 1.4 and 3.3 respectively indicating a weak-coupling superconducting state. These measurements also indirectly indicated that a predominant fully gapped s-wave order parameter could describe the superconducting state of Ru 7 B 3 well.…”

mentioning

confidence: 98%

Spectroscopic evidence of mixed angular momentum symmetry in non-centrosymmetric Ru$_7$B$_3$

Datta¹,

Vasdev²,

Ramachandran³

et al. 2021

Preprint

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Superconducting crystals with lack of inversion symmetry can potentially host unconventional pairing. However, till date, no direct conclusive experimental evidence of such unconventional order parameters in non-centrosymmetric superconductors has been reported. In this paper, through direct measurement of the superconducting energy gap by scanning tunnelling spectroscopy, we report the existence of both s-wave (singlet) and p-wave (triplet) pairing symmetries in noncentrosymmetric Ru 7 B 3 . Our temperature and magnetic field dependent studies also indicate that the relative amplitudes of the singlet and triplet components of the order parameter change differently with temperature.

show abstract

Crystal growth and properties of the non-centrosymmetric superconductor, Ru7B3

Cited by 10 publications

References 14 publications

Rotation of the magnetic vortex lattice in Ru7B3 driven by the effects of broken time-reversal and inversion symmetry

Rotation of the magnetic vortex lattice in Ru7B3 driven by the effects of broken time-reversal and inversion symmetry

Spectroscopic evidence of mixed angular momentum symmetry in non-centrosymmetric Ru$$_7$$B$$_3$$

Spectroscopic evidence of mixed angular momentum symmetry in non-centrosymmetric Ru$_7$B$_3$

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