Superconductivity as a function of carrier density and magnetic spin concentration in the SnTe-MnTe system

Mathur, M. P.; Deis, D. W.; Jones, C. K.; Carr, W. J.

doi:10.1016/0022-3697(73)90075-9

Cited by 17 publications

(15 citation statements)

References 9 publications

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“…On the metal site characteristics, Pb and Sn prefer a valence state of +2 in an NaCl-type structure. 23,24) In addition, AgBiCh2 can be crystalized in a NaCl-type structure at high temperatures by alloying Ag + and Bi 3+ . 25,26) .…”

Section: Resultsmentioning

confidence: 99%

Superconductivity in High-Entropy-Alloy Telluride AgInSnPbBiTe₅

Mizuguchi

2019

J. Phys. Soc. Jpn.

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A polycrystalline sample of the high-entropy-alloy-type telluride AgInSnPbBiTe5 was synthesized using high-pressure synthesis. Superconductivity with a transition temperature (Tc) of 2.6 K was observed in AgInSnPbBiTe5. Elemental and structural analyses revealed that five metals are mixed in a metal site of an NaCl-type structure. Since AgInSnPbBiTe5 has a cation site (Ag, In, Sn, Pb, and Bi) and an anion site (Te), this is the first example of a high-entropy-alloy (HEA) pseudo-binary superconductor.

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Section: Resultsmentioning

confidence: 99%

Superconductivity in High-Entropy-Alloy Telluride AgInSnPbBiTe₅

Mizuguchi

2019

J. Phys. Soc. Jpn.

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“…As we cooled to 6 K, the resistivity dropped rapidly to zero, in a manner consistent with the onset of superconductivity. Indeed, there have been previous reports of low temperature, carrier concentration dependent superconductivity in SnTe 9,[32][33][34] .…”

Section: Resultsmentioning

confidence: 99%

Tin telluride: A weakly co-elastic metal

et al. 2010

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We report resonant ultrasound spectroscopy (RUS), dilatometry/magnetostriction, magnetotransport, magnetization, specific-heat, and 119 Sn Mössbauer spectroscopy measurements on SnTe and Sn0.995Cr0.005Te. Hall measurements at T = 77 K indicate that our Bridgman-grown single crystals have a p-type carrier concentration of 3.4×10 19 cm −3 and that our Cr-doped crystals have an n-type concentration of 5.8 × 10 22 cm −3 . Although our SnTe crystals are diamagnetic over the temperature range 2 K ≤ T ≤ 1100 K, the Cr-doped crystals are room temperature ferromagnets with a Curie temperature of 294 K. For each sample type, three-terminal capacitive dilatometry measurements detect a subtle 0.5 micron distortion at Tc ≈ 85 K. Whereas our RUS measurements on SnTe show elastic hardening near the structural transition, pointing to co-elastic behavior, similar measurements on Sn0.995Cr0.005Te show a pronounced softening, pointing to ferroelastic behavior. Effective Debye temperature, θD, values of SnTe obtained from 119 Sn Mössbauer studies show a hardening of phonons in the range 60-115K (θD = 162K) as compared with the 100-300K range (θD = 150K). In addition, a precursor softening extending over approximately 100 K anticipates this collapse at the critical temperature, and quantitative analysis over three decades of its reduced modulus finds ∆C44/C44 = A|(T − T0)/T0| −κ with κ = 0.50 ± 0.02, a value indicating a three-dimensional softening of phonon branches at a temperature T0 ∼ 75 K, considerably below Tc. We suggest that the differences in these two types of elastic behaviors lie in the absence of elastic domain wall motion in the one case and their nucleation in the other.

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“…Particularly, SnTe has been extensively studied because it is a topological crystalline insulator [15] and shows superconductivity when the Sn site was substituted by In or Ag [8][9][10][11][12][13][14]. Although non-doped SnTe also shows superconductivity below 0.3 K [16], hole doping effectively increases Tc to 4.8 K in the In-substituted system [8][9][10][11][12] and to 2.4 K in the Ag-substituted system [13,14]. In addition, possible topological superconductivity has been proposed for the Sn1-xInxTe system [15,17].…”

Section: Introductionmentioning

confidence: 99%

High-Pressure Synthesis and Superconducting Properties of NaCl-Type In1−xPbxTe (x = 0–0.8)

et al. 2020

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We have investigated the Pb-substitution effect on the superconductivity of NaCl-type In1-xPbxTe samples obtained using high-pressure synthesis. Polycrystalline samples with x = 0-0.8 were obtained, and the lattice parameter systematically increased by Pb substitution. The superconducting transition temperature (Tc ~3 K for x = 0) increased to 5.3 K (for x = 0.4) by Pb substitutions. According to the comparison of the electronic states between NaCl-type InTe and PbTe, we consider that the Pb substitution increases electron carriers. Possible mechanisms of the enhancement of Tc in this system have been discussed on the basis of conventional pairing mechanism and the possibility of the relation to the valence-skipping state of In.

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Superconductivity as a function of carrier density and magnetic spin concentration in the SnTe-MnTe system

Cited by 17 publications

References 9 publications

Superconductivity in High-Entropy-Alloy Telluride AgInSnPbBiTe₅

Superconductivity in High-Entropy-Alloy Telluride AgInSnPbBiTe₅

Tin telluride: A weakly co-elastic metal

High-Pressure Synthesis and Superconducting Properties of NaCl-Type In1−xPbxTe (x = 0–0.8)

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Superconductivity as a function of carrier density and magnetic spin concentration in the SnTe-MnTe system

Cited by 17 publications

References 9 publications

Superconductivity in High-Entropy-Alloy Telluride AgInSnPbBiTe5

Superconductivity in High-Entropy-Alloy Telluride AgInSnPbBiTe5

Tin telluride: A weakly co-elastic metal

High-Pressure Synthesis and Superconducting Properties of NaCl-Type In1−xPbxTe (x = 0–0.8)

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Superconductivity in High-Entropy-Alloy Telluride AgInSnPbBiTe₅

Superconductivity in High-Entropy-Alloy Telluride AgInSnPbBiTe₅