High-pressure study of the basal-plane anisotropy of the upper critical field of the topological superconductor SrxBi2Se3

Abstract

We report a high-pressure transport study of the upper-critical field, $B_{c2}(T)$, of the topological superconductor Sr${}_{0.15}$Bi${}_2$Se${}_3$ ($T_c=3.0$ K). $B_{c2}(T)$ was measured for magnetic fields directed along two orthogonal directions, $a$ and $a^{\ast }$, in the trigonal basal plane. While superconductivity is rapidly suppressed at the critical pressure $p_c\sim 3.5$ GPa, the pronounced two-fold basal-plane anisotropy $B_{c2}^a/B_{c2}^{a^{\ast }}=3.2$ at $T=0.3$ K, recently reported at ambient pressure (Pan et al., 2016), is reinforced and attains a value of $\sim 5$ at the highest pressure (2.2 GPa). The data reveal that the unconventional superconducting state with broken rotational symmetry is robust under pressure.

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Cited by in corpus (27)

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• Nematic superconductivity in doped Bi2Se3 topological superconductors
• Nematic superconductivity stabilized by density wave fluctuations: Possible application to twisted bilayer graphene
• Structural distortion behind the nematic superconductivity in Sr${}_x$Bi${}_2$Se${}_3$
• Generalized Anderson's theorem for superconductors derived from topological insulators
• Uniaxial-strain Control of Nematic Superconductivity in Sr${}_x$Bi${}_2$Se${}_3$
• Nanocalorimetric Evidence for Nematic Superconductivity in the Doped Topological Insulator Sr${}_{0.1}$Bi${}_2$Se${}_3$
• Direction and symmetry transition of the vector order parameter in topological superconductors Cu${}_x$Bi${}_2$Se${}_3$
• Chiral Higgs Mode in Nematic Superconductors
• Nematic Superconductivity in Cu1.5(PbSe)5(Bi2Se3)6
• Spin triplet nematic pairing symmetry and superconducting double transition in U${}_{1-x}$Th${}_x$Be${}_{13}$
• Superconductivity, pairing symmetry, and disorder in the doped topological insulator Sn${}_{1-x}$In${}_x$Te for x $\ge$ 0.10
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• Muon spin rotation study of the topological superconductor SrxBi2Se3
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• The effect of interorbital scattering on superconductivity in doped Dirac materials
• Phonon-induced rotation of the electronic nematic director in superconducting Bi${}_2$Se${}_3$
• Universal superconductivity phase diagram for pressurized tetradymite topological insulators
• Spin-Nernst Effect in Time-Reversal-Invariant Topological Superconductors
• An increase in $T_c$ under hydrostatic pressure in the superconducting doped topological insulator Nb${}_{0.25}$Bi${}_2$Se${}_3$
• Evidence for conventional superconductivity in Sr0.1Bi2Se3 from high pressure studies
• Anisotropic Upper Critical Field, Seebeck and Nernst Coefficient in Nb0.20Bi2Se3 Topological Superconductor
• Pauli paramagnetism of triplet Cooper pairs in a nematic superconductor
• Odd-frequency pairs and anomalous proximity effect in nematic and chiral states of superconducting topological insulators
• Superconducting and normal-state anisotropy of the doped topological insulator Sr${}_{0.1}$Bi${}_2$Se${}_3$
• Surface chiral superconductivity in odd-parity nematic superconductors with magnetic impurities
• Quantum Oscillations and Superconductivity in YPtBi Under Pressure