Anisotropy reversal of the upper critical field at low temperatures and spin-locked superconductivity in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mtext>K</mml:mtext><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mtext>Cr</mml:mtext><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mtext>As</mml:mtext><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math>

Balakirev, Fedor; Kong, Tai; Jaime, M.; McDonald, R. D.; Mielke, C. H.; Gurevich, A.; Canfield, Paul C.; Bud’ko, Sergey L.

doi:10.1103/physrevb.91.220505

Cited by 66 publications

(76 citation statements)

References 36 publications

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“…S2 and S3 in SM). Overall, the obtained H c2 − T phase diagram is similar to the previous profile [19], featured by the crossing of H ⊥ c2 (T ) and H c2 (T ). The "crossover" temperature is 3.1 K, somewhat lower than the value (≈ 4 K) previously reported [19].…”

Section: A Hc2(t θ) Resultssupporting

confidence: 84%

“…This is probably due to the chemical reaction between sample and the silver-paste electrodes, which forms a non-superconducting KCr 3 As 3 phase [33]. Nevertheless, the partial deterioration of the sample does not affect the H c2 determination because the onset transition temperature T onset c value is not altered, compared with the previous reports [11,18,19,32].…”

Section: A Hc2(t θ) Resultsmentioning

confidence: 73%

“…(2) K 2 Cr 3 As 3 shows a large upper critical field H c2 , which exceeds the BCS weak-coupling Pauli limit [16,17], H P c2 = 18.4T c ≈ 110 kOe, by 3−4 times [11,18,19]. (3) The 75 As nuclear quadrapole resonance (NQR) shows a strong enhancement of Cr-spin fluctuations above T c and, there is no Hebel-Slichter coherence peak in the temperature dependence of nuclear spinlattice relaxation rate just below T c for K 2 Cr 3 As 3 [20].…”

Section: Introductionmentioning

confidence: 98%

“…Measurements using single crystals revealed a large initial slope, −(dH c2 /dT )| Tc , of 120 kOe/K [18] or 161 kOe/K [32], for field parallel to the crystallographic c axis (H c). H c2 (T ) exhibits a strongly negative curvature, and it saturates at about 230 kOe, indicating a Paulilimiting scenario with significant spin-orbit coupling [19].…”

Section: Introductionmentioning

confidence: 99%

“…The temperature and angular dependence of H c2 reflect the mechanisms of Cooper-pair breaking due to an orbital and/or Zeeman effect. H c2 (T ) data of K 2 Cr 3 As 3 have been measured for different samples [11,18,19,32]. Measurements using single crystals revealed a large initial slope, −(dH c2 /dT )| Tc , of 120 kOe/K [18] or 161 kOe/K [32], for field parallel to the crystallographic c axis (H c).…”

Section: Introductionmentioning

confidence: 99%

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Temperature and angular dependence of the upper critical field in K2Cr3As3

et al. 2017

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We report measurements of the upper critical field Hc2 as functions of temperature T , polar angle θ (of the field direction with respect to the crystallographic c axis), and azimuthal angle φ (of the field direction relative to the a axis within the ab plane) for the Cr-based superconductor K2Cr3As3 with a quasi-one-dimensional and non-centrosymmetric crystal structure. We confirm that the anisotropy in Hc2(T ) becomes inverse with decreasing temperature. At low temperatures, Hc2(θ) data are featured by two maxima at θ = 0 (H c) and π/2 (H⊥c), which can be quantitatively understood only if uniaxial effective-mass anisotropy and absence of Pauli paramagnetic effect for H⊥c are taken simultaneously into consideration. The in-plane Hc2(φ) profile shows a unique threefold modulation especially at low temperatures. Overall, the characteristic of the Hc2(θ, φ, T ) data mostly resemble those of the heavy-fermion superconductor UPt3, and we argue a dominant spin-triplet superconductivity with odd parity in K2Cr3As3.

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Section: A Hc2(t θ) Resultssupporting

confidence: 84%

Section: A Hc2(t θ) Resultsmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Temperature and angular dependence of the upper critical field in K2Cr3As3

et al. 2017

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Exploring Topological Superconductivity in Topological Materials

2019

Adv Quantum Tech

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The exploration of topological superconductivity and Majorana zero modes has become a rapidly developing field. Many types of proposals to realize topological superconductors have been presented, and significant advances have been recently made. In this review, a survey is conducted on the experimental progress in possible topological superconductors and induced superconductivity in topological insulators or semimetals as well as artificial structures. The approaches to inducing superconductivity in topological materials mainly include high pressure application, the hard-tip point contact method, chemical doping or intercalation, the use of artificial topological superconductors, and electric field gating. The evidence supporting topological superconductivity and signatures of Majorana zero modes are also discussed and summarized.

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Electronic Structures of Newly Discovered Quasi-One-Dimensional Superconductors A2Mo3As3 (A=K,Rb,Cs)

Yang

Feng

et al. 2019

J Supercond Nov Magn

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Anisotropy reversal of the upper critical field at low temperatures and spin-locked superconductivity inK2Cr3As3

Cited by 66 publications

References 36 publications

Temperature and angular dependence of the upper critical field in K2Cr3As3

Temperature and angular dependence of the upper critical field in K2Cr3As3

Exploring Topological Superconductivity in Topological Materials

Electronic Structures of Newly Discovered Quasi-One-Dimensional Superconductors A2Mo3As3 (A=K,Rb,Cs)

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