Turning a Band Insulator Into an Exotic Superconductor

Abstract

Understanding exotic, non s--wave--like states of Cooper pairs is important and may lead to new superconductors with higher critical temperatures and novel properties. Their existence is known to be possible but has always been thought to be associated with non--traditional mechanisms of superconductivity where electronic correlations play an important role. Here we use a first principles linear response calculation to show that in doped Bi${}_2$Se${}_3$ an unconventional p--wave--like state can be favored via a conventional phonon--mediated mechanism, as driven by an unusual, almost singular behavior of the electron--phonon interaction at long wavelengths. This may provide a new platform for our understanding superconductivity phenomena in doped band insulators.

Published version

References in corpus (11)

• Classification of topological insulators and superconductors in three spatial dimensions
• Pressure-Induced Unconventional Superconducting Phase in the Topological Insulator Bi2Se3
• Local Measurements of the Superconducting Pairing Symmetry in CuxBi2Se3
• Odd-Parity Pairing and Topological Superconductivity in a Strongly Spin-Orbit Coupled Semiconductor
• Electrochemical synthesis and superconducting phase diagram of Cu_xBi2Se3
• Evolution of the fermi surface of a doped topological insulator with carrier concentration
• Pressure-induced Superconductivity in CaC2
• Unconventional superconducting pairing by conventional phonons
• Phonon-mediated tuning of instabilities in the Hubbard model at half-filling
• Topological superfluids with time reversal symmetry
• Unconventional superconducting pairing symmetry induced by phonons

Cited by in corpus (40)

• Colloquium: Topological Band Theory
• Topological Crystalline Insulators and Topological Superconductors: From Concepts to Materials
• Topology of crystalline insulators and superconductors
• Spin-Rotation Symmetry Breaking in the Superconducting State of CuxBi2Se3
• Superconductivity with topological surface state in SrxBi2Se3
• Odd-parity topological superconductor with nematic order: Application to CuxBi2Se3
• Weak-Pairing Higher Order Topological Superconductors
• Two-dimensional time-reversal-invariant topological superconductivity in a doped quantum spin Hall insulator
• Pressure-induced semimetal to superconductor transition in a three-dimensional topological material ZrTe5
• Symmetry Protected Topological Superfluids and Superconductors --- From the Basics to ${}^3$He ---
• Odd-parity superconductivity in the vicinity of inversion symmetry breaking in spin-orbit-coupled systems
• Topological superconductivity and unconventional pairing in oxide interfaces
• Odd-parity superconductors with two-component order parameters: nematic and chiral, full gap and Majorana node
• Odd-parity superconductivity from phonon-mediated pairing: Application to Cu${}_x$Bi${}_2$Se${}_3$
• Manipulation of type-I and type-II Dirac points in PdTe2 superconductor by external pressure
• Identification of nematic superconductivity from the upper critical field
• Topological superconducting phases from inversion symmetry breaking order in spin-orbit-coupled systems
• Exploring Topological Superconductivity in Topological Materials
• Topological phase transitions in multi-component superconductors
• Pressure induced re-emergence of superconductivity in superconducting topological insulator Sr0.065Bi2Se3
• Pressure-induced Superconductivity in the Three-component Fermion Topological Semimetal Molybdenum Phosphide
• Spin-triplet superconductivity from interband effect in doped insulators
• Uniaxial-strain Control of Nematic Superconductivity in Sr${}_x$Bi${}_2$Se${}_3$
• Superconducting doped topological materials
• Nematic and chiral superconductivity induced by odd-parity fluctuations
• Pressure-induced superconductivity in topological semimetal NbAs2
• Plasmon-enhanced electron-phonon coupling in Dirac surface states of the thin-film topological insulator Bi2Se3
• Novel three-dimensional Fermi surface and electron-correlation-induced charge density wave in FeGe
• A combined method for synthesis of superconducting Cu doped Bi2Se3
• Evidence for singular-phonon-induced nematic superconductivity in a topological superconductor candidate Sr${}_{0.1}$Bi${}_2$Se${}_3$
• Time-reversal-invariant topological superconductivity in n-doped BiH
• Link between superconductivity and a Lifshitz transition in intercalated Bi${}_2$Se${}_3$
• Antichiral and nematicity-wave superconductivity
• Nematic superconductivity in topological insulators induced by hexagonal warping
• Charge correlations suppress unconventional pairing in the Holstein model
• Shear Modulus Anomaly of Unconventional Superconductor in a Symmetry Breaking Field
• Possible two-component pairings in electron-doped Bi${}_2$Se${}_3$ based on a tight-binding model
• Anomalous 140 K electronic transition in Bi${}_2$Se${}_3$: Possible charge order in a defect-engineered system
• Resolving phonon-mediated superconducting pairing symmetries from first-principles calculation
• Unconventional Pairings and Radial Line Nodes in Inversion Symmetry Broken Superconductors