Nematic superconductivity in doped Bi2Se3 topological superconductors

Abstract

Nematic superconductivity is a novel class of superconductivity characterized by spontaneous rotational-symmetry breaking in the superconducting gap amplitude and/or Cooper-pair spins with respect to the underlying lattice symmetry. Doped Bi2Se3 superconductors, such as CuxBi2Se3, SrxBi2Se3, and NbxBi2Se3, are considered as candidates for nematic superconductors, in addition to the anticipated topological superconductivity. Recently, various bulk probes, such as nuclear magnetic resonance, specific heat, magnetotransport, magnetic torque, and magnetization, have consistently revealed two-fold symmetric behavior in their in-plane magnetic-field-direction dependence, although the underlying crystal lattice possesses three-fold rotational symmetry. More recently, nematic superconductivity is directly visualized using scanning tunneling microscopy and spectroscopy. In this short review, we summarize the current researches on the nematic behavior in superconducting doped Bi2Se3 systems, and discuss issues and perspectives.

20 pages (incl. 5 pages of reference list), 4 figures; Submitted for the proceedings of Erice Workshop 2018 "Majorana Fermions and Topological Materials Science". Small revisions are made on 14th Dec. Comments are welcome

References in corpus (23)

• Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
• High Resolution Polar Kerr Effect Measurements of Sr2RuO4: Evidence for Broken Time Reversal Symmetry in the Superconducting State
• Lattice symmetry breaking in cuprate superconductors: Stripes, nematics, and superconductivity
• Nematic and meta-nematic transitions in the iron pnictides
• Formation of a Nematic Fluid at High Fields in Sr3Ru2O7
• Bulk superconducting phase with a full energy gap in the doped topological insulator Cu_xBi_2Se_3
• Observation of broken time-reversal symmetry in the heavy fermion superconductor UPt${}_3$
• Odd-parity topological superconductor with nematic order: Application to CuxBi2Se3
• Topological surface states in nodal superconductors
• Electrochemical synthesis and superconducting phase diagram of Cu_xBi2Se3
• Evidence for broken time-reversal symmetry in the superconducting phase of URu${}_2$Si${}_2$
• First-Order Superconducting Transition of Sr2RuO4
• Colossal thermomagnetic response in the exotic superconductor URu2Si2
• A new superconductor derived from topological insulator heterostructure
• Suppression of superconductivity by non-magnetic disorder in the organic superconductor (TMTSF)2(ClO4)(1-x)(ReO4)x
• Superconducting doped topological materials
• Specific-heat evidence of the first-order superconducting transition in Sr2RuO4
• High-pressure study of the basal-plane anisotropy of the upper critical field of the topological superconductor SrxBi2Se3
• Anomalous suppression of the superfluid density in the CuxBi2Se3 superconductor upon progressive Cu intercalation
• Non-fragile superconductivity with nodes in the superconducting topological insulator CuxBi2Se3: Zeeman orbital field and non-magnetic impurities
• Effect of Fermi surface evolution on superconducting gap in superconducting topological insulator
• Anomalous Field-Angle Dependence of the Specific Heat of Heavy-Fermion Superconductor UPt3
• On the superconducting state of the organic conductor $(TMTSF{)}_{2}Cl{O}_4$

Cited by in corpus (38)

• Unconventional Superconductivity in UTe2
• A comprehensive review on topological superconducting materials and interfaces
• Chiral to Nematic Crossover in the Superconducting State of 4Hb-TaS${}_2$
• Charge-$4e$ superconductivity from nematic superconductors in 2D and 3D
• Nonreciprocal optical response in parity-breaking superconductors
• Intrinsic first and higher-order topological superconductivity in a doped topological insulator
• Spontaneous rotational symmetry breaking in KTaO${}_3$ heterointerface superconductors
• Electronic multipoles and multiplet pairs induced from Pomeranchuk and Cooper instabilities of Bogoliubov Fermi surfaces
• Directly visualizing nematic superconductivity driven by the pair density wave in NbSe${}_2$
• Violation of Emergent Rotational Symmetry in the Hexagonal Kagome Superconductor CsV3Sb5
• The Vertical Position of Sr Dopants in the Sr${}_x$Bi${}_2$Se${}_3$ Superconductor
• Superconducting properties of the spin Hall candidate Ta3Sb with eightfold degeneracy
• Spin-Nernst Effect in Time-Reversal-Invariant Topological Superconductors
• The absence of Ginzburg-Landau mechanism for vestigial order in the normal phase above a two-component superconductor
• Observability of superconductivity in Sr-doped Bi2Se3 at the surface using scanning tunneling microscope
• Lifshitz transition in dirty nematic superconductor
• Full superconducting gap in the candidate topological superconductor In${}_{1-x}$Pb${}_x$Te for x = 0.2
• Anisotropic Upper Critical Field, Seebeck and Nernst Coefficient in Nb0.20Bi2Se3 Topological Superconductor
• Bound states around impurities in a superconducting bilayer
• Probing three-state Potts nematic fluctuations by ultrasound attenuation
• Spin caloritronics as a probe of nonunitary superconductors
• Anisotropic multiband superconductivity in 2M-WS${}_2$ probed by controlled disorder
• Anisotropic spin-current spectroscopy of ferromagnetic superconducting gap symmetries
• Investigation of superconducting properties and possible nematic superconductivity in self-doped BiCh2-based superconductor CeOBiS1.7Se0.3
• Strain induced spin vortex and Majorana Kramer's pairs in doped topological insulators with nematic superconductivity
• Superconductivity and vortex structure on Bi${}_2$Te${}_3$/FeTe${}_{0.55}$Se${}_{0.45}$ heterostructures with different thickness of Bi${}_2$Te${}_3$ films
• Possible two-component pairings in electron-doped Bi${}_2$Se${}_3$ based on a tight-binding model
• Unconventional superconductivity from electronic dipole fluctuations
• Interaction between spin and Abrikosov vortices in doped topological insulators
• Anomalous Josephson Hall effect in doped topological insulators with the nematic superconductivity
• Revisiting vestigial order in nematic superconductors: gauge-field mechanisms and model constraints
• Superconducting Gap Structures in Wallpaper Fermion Systems
• Anomalous behavior of the $E_u^1$ infrared-active phonon mode in a Bi${}_{2-x}$Sr${}_x$Se${}_3$ crystal
• Strain-induced Berry phase in chiral superconductors
• Double-twisted surface spectrum from hybridized Majorana Kramers pairs and wallpaper fermions
• Terahertz electro-optic effect in Bi${}_2$Se${}_3$ crystals
• Current-induced superconducting anisotropy of Sr${}_2$RuO${}_4$
• Evolution of two bulk-superconducting phases in Sr0.5RE0.5FBiS2 (RE: La, Ce, Pr, Nd, Sm) by external hydrostatic pressure effect