Pressure effect on the superconducting and the normal state of 
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Pristáš, G.; Orendáč, M.; Gabáni, S.; Kačmarčı́k, J.; Gažo, E.; Correa-Orellana, A.; Herrera, Edwin; Suderow, Hermann; Samuely, P.

doi:10.1103/physrevb.97.134505

Cited by 16 publications

(20 citation statements)

References 33 publications

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“…5). The Sommerfeld coefficient value matches well with the α-PdBi reported value, but a large deviation from αand β-PdBi 2 is observed [32,35,36]. According to the free-electron theory, the Sommerfeld coefficient is used to evaluate the density of state at Fermi level as per the relation , where R = 8.314 J mol −1 K −1 is a gas constant.…”

Section: B Superconducting and Normal State Propertiessupporting

confidence: 68%

Superconductivity in Bi based Bi2PdPt

Kataria¹,

T.²,

Sharma³

et al. 2022

Preprint

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We report synthesis and properties of superconducting Bi2PdPt, a new member of Bi-Pd based compounds known for their simultaneous existence of topological surfaces states and superconductivity. It crystallizes in a hexagonal structure having space group P 63/mmc. A detailed investigation of the properties via transport, magnetization, and specific heat measurements confirm bulk superconductivity with transition temperature, T C = 4.0(1) K in moderate coupling limit.

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Section: B Superconducting and Normal State Propertiessupporting

confidence: 68%

Superconductivity in Bi based Bi2PdPt

Kataria¹,

T.²,

Sharma³

et al. 2022

Preprint

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“…If we consider that λ(T ) = λ(0)/ 1 − (T /T c ) 4 , we estimate T c,def ect = 4.38 K. According to the study of Ref. 42, this T c corresponds to a local pressure of ∼ 20 kbar. This subtle local change in T c is very difficult to detect (we provide further details in the Appendix E).…”

Section: Discussionmentioning

confidence: 97%

“…Generally, with dT c /dP > 0, vortices are repelled from places with internal stress and the opposite occurs with dT c /dP < 0. The pressure dependence of T c in β-Bi 2 Pd was measured in bulk samples 42,43 , giving dT c /dP = −0.025 K/kbar. T c,bulk = 5 K for the unstressed region and our SOT measurements are performed at T = 4.2 K. Thus, a variation in T c of a fraction of a degree is sufficient to change penetration depth by a factor ∼2.…”

Section: Discussionmentioning

confidence: 99%

Observation of a gel of quantum vortices in a superconductor at very low magnetic fields

Llorens

Embon

Correa

et al. 2020

Phys. Rev. Research

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A gel consists of a network of particles or molecules formed for example using the sol-gel process, by which a solution transforms into a porous solid. Particles or molecules in a gel are mainly organized on a scaffold that makes up a porous system. Quantized vortices in type II superconductors mostly form spatially homogeneous ordered or amorphous solids. Here we present high-resolution imaging of the vortex lattice displaying dense vortex clusters separated by sparse or entirely vortex-free regions in β-Bi2Pd superconductor. We find that the intervortex distance diverges upon decreasing the magnetic field and that vortex lattice images follow a multifractal behavior. These properties, characteristic of gels, establish the presence of a novel vortex distribution, distinctly different from the well-studied disordered and glassy phases observed in high-temperature and conventional superconductors. The observed behavior is caused by a scaffold of one-dimensional structural defects with enhanced stress close to the defects. The vortex gel might often occur in type-II superconductors at low magnetic fields. Such vortex distributions should allow to considerably simplify control over vortex positions and manipulation of quantum vortex states. arXiv:1904.10999v2 [cond-mat.supr-con]

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“…The recently discovered superconductor β-PdBi 2 provides a promising candidate for the long-sought stoichiometric topological superconductor [10][11][12][13]. Previous studies have shown that β-PdBi 2 holds a superconducting transition temperature, ranging from 4.25 K to 5.4 K, depending on sample quality [14][15][16]. Angle-resolved photoemission spectroscopy (ARPES) reveals the presence of topological surface states with in-plane spin polarizations [15], which is useful for future spintronics research using a topological superconductor.…”

Section: Introductionmentioning

confidence: 99%

Thickness Dependence of Superconductivity in Layered Topological Superconductor β-PdBi2

Wang

Gao

et al. 2021

Nanomaterials

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We report a systematic study on the thickness-dependent superconductivity and transport properties in exfoliated layered topological superconductor β-PdBi2. The superconducting transition temperature Tc is found to decrease with the decreasing thickness. Below a critical thickness of 45 nm, the superconductivity is suppressed, but followed by an abrupt resistance jump near Tc, which is in opposite to the behavior in a superconductor. We attribute suppressed Tc to the enhanced disorder as the thickness decreases. The possible physical mechanisms were discussed for the origination of sharply increased resistance in thinner β-PdBi2 samples.

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Pressure effect on the superconducting and the normal state of β−Bi2Pd

Cited by 16 publications

References 33 publications

Superconductivity in Bi based Bi2PdPt

Superconductivity in Bi based Bi2PdPt

Observation of a gel of quantum vortices in a superconductor at very low magnetic fields

Thickness Dependence of Superconductivity in Layered Topological Superconductor β-PdBi2

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