Strain-driven nematicity of the odd-parity superconductivity in Sr${}_x$Bi${}_2$Se${}_3$

Abstract

We present a novel experimental evidence for the odd-parity nematic superconductivity in high-quality single crystals of doped topological insulator Sr${}_x$Bi${}_2$Se${}_3$. The X-ray diffraction shows that the grown single crystals are either weakly stretched or compressed uniaxially in the basal plane along one of the crystal axis. We show that in the superconducting state, the upper critical magnetic field $H_{c2}$ has a two-fold rotational symmetry and depends on the sign of the strain: in the stretched samples, the maximum of $H_{c2}$ is achieved when the in-plane magnetic field is transverse to the strain axis, while in the compressed samples this maximum is observed when the field is along the strain direction. This result is naturally explained within a framework of the odd-parity nematic superconductivity coupled to the strain. Magnetoresistance in the normal state is independent of the current direction and also has a two-fold rotational symmetry that demonstrates the nematicity of the electronic system in the normal state.

References in corpus (35)

• Topological Insulators
• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Topological superconductors: a review
• Majorana Zero Modes and Topological Quantum Computation
• Superconductivity in CuxBi2Se3 and its implications for pairing in the undoped topological insulator
• Colloquium: Majorana Fermions in nuclear, particle and solid-state physics
• Odd-Parity Topological Superconductors: Theory and Application to Cu${}_x$Bi${}_2$Se${}_3$
• Hexagonal Warping Effects in the Surface States of Topological Insulator Bi${}_2$Te${}_3$
• Topological Superconductivity in CuxBi2Se3
• Observation of topological order in a Superconducting doped topological insulator (based on the Bi2Se3 class)
• Spin-Rotation Symmetry Breaking in the Superconducting State of CuxBi2Se3
• Bulk superconducting phase with a full energy gap in the doped topological insulator Cu_xBi_2Se_3
• Thermodynamic evidence for nematic superconductivity in Cu${}_x$Bi${}_2$Se${}_3$
• Superconductivity with topological surface state in SrxBi2Se3
• Odd-parity topological superconductor with nematic order: Application to CuxBi2Se3
• Planar Hall effect from the surface of topological insulators
• Robustness of Majorana fermions in 2D topological superconductors
• Rotational Symmetry Breaking in a Trigonal superconductor Nb-doped Bi2Se3
• Nematic superconductivity in doped Bi2Se3 topological superconductors
• Vestigial nematic order and superconductivity in the doped topological insulator Cu${}_x$Bi${}_2$Se${}_3$
• Direct visualization of the nematic superconductivity in Cu${}_x$Bi${}_2$Se${}_3$
• Identification of nematic superconductivity from the upper critical field
• Superconductivity with two-fold symmetry in topological superconductor SrxBi2Se3
• Anomalous Supercurrent from Majorana States in Topological Insulator Josephson Junctions
• Magnetic-proximity-induced magnetoresistance on topological insulators
• Exploring Topological Superconductivity in Topological Materials
• Structural distortion behind the nematic superconductivity in Sr${}_x$Bi${}_2$Se${}_3$
• Quasi-particle evidence for the nematic state above $T_{\mathrm{c}}$ in Sr${}_x$Bi${}_2$Se${}_3$
• Longitudinal conductivity of massless fermions with tilted Dirac cone in magnetic field
• Nanocalorimetric Evidence for Nematic Superconductivity in the Doped Topological Insulator Sr${}_{0.1}$Bi${}_2$Se${}_3$
• Surface charge conductivity of topological insulator in a magnetic field: effect of hexagonal warping
• Majorana fermions at the edge of superconducting islands
• Nematic Superconductivity in Cu1.5(PbSe)5(Bi2Se3)6
• Majorana fermion from Landau quantization in 2D topological superconductors
• Effect of Sr doping on structure, morphology and transport properties of Bi${}_2$Se${}_3$ epitaxial thin films

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• Uniaxial-strain Control of Nematic Superconductivity in Sr${}_x$Bi${}_2$Se${}_3$
• Link between superconductivity and a Lifshitz transition in intercalated Bi${}_2$Se${}_3$
• Phonon-driven ultrafast symmetry lowering in a Bi${}_2$Se${}_3$ crystal
• Can bilayer graphene become a fractional metal?
• Nematic superconductivity in topological insulators induced by hexagonal warping
• Strain-tuned quantum criticality in electronic Potts-nematic systems
• Phonon-induced rotation of the electronic nematic director in superconducting Bi${}_2$Se${}_3$
• Spontaneous strain and magnetization in doped topological insulators with nematic and chiral superconductivity
• Breaking of Ginzburg-Landau description in the temperature dependence of the anisotropy in the nematic superconductor
• Lifshitz transition in dirty nematic superconductor
• Quasiparticle interference in doped topological insulators with nematic superconductivity
• 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
• Strain induced spin vortex and Majorana Kramer's pairs in doped topological insulators with nematic superconductivity
• Shear Modulus Anomaly of Unconventional Superconductor in a Symmetry Breaking Field
• Anomalous Josephson Hall effect in doped topological insulators with the nematic superconductivity
• On the existence of nematic-superconducting states in the Ginzburg-Landau regime
• Interaction between spin and Abrikosov vortices in doped topological insulators