Can deeply underdoped superconducting cuprates be topological superconductors?

Abstract

The nodal $d_{x^2-y^2}$ superconducting gap is a hallmark of the cuprate high T${}_c$ superconductors. Surprisingly recent angle-resolved photoemission spectroscopy of deeply underdoped cuprates revealed a nodeless energy gap which is adhered to the Fermi surface. Importantly this phenomenon is observed for compounds across several different cuprate families. In this letter we propose an exciting possibility, namely the fully gapped state is a topological superconductor.

4 pages, 1 table, 3 figures + 4.5 pages supplemental materials

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• Classification of topological insulators and superconductors in three spatial dimensions
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• Distinct Fermi-Momentum Dependent Energy Gaps in Deeply Underdoped Bi2212
• Phase competition in trisected superconducting dome
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Cited by in corpus (25)

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• Route to Topological Superconductivity via Magnetic Field Rotation
• Observation of Topological Surface State in High Temperature Superconductor MgB2
• Majorana surface modes of nodal topological pairings in spin-$\frac{3}{2}$ semi-metals
• Topological superconducting states in monolayer FeSe/SrTiO${}_3$
• Topological superconductivity and Majorana states in low-dimensional systems
• Tip-induced Superconductivity Coexisting with Preserved Topological Properties in Line-nodal Semimetal ZrSiS
• Superconducting phase diagram of itinerant antiferromagnets
• Induced spin-triplet pairing in the coexistence state of antiferromagnetism and singlet superconductivity: collective modes and microscopic properties
• Chemical Principles of Intrinsic Topological Superconductors
• Surprises in the t-J model: Implications for cuprates
• Quantum many-body scars with unconventional superconducting pairing symmetries via multibody interactions
• Stability of superconducting gap symmetries arising from antiferromagnetic magnons
• Doping-driven Antiferromagnetic Insulator -- Superconductor Transition: a Quantum Monte Carlo Study
• Prediction of $f$-wave pairing symmetry in YBa${}_2$Cu${}_3$O${}_{6+x}$ cuprates
• Exotic Superconductivity in the Extended Attractive Hubbard Model
• Superconductivity, pair density wave, and Neel order in cuprates
• Superfluid density in the slave-boson theory
• Topological phase in a $d_{x^2-y^2}+(p+ip)$ superconductor in presence of spin-density-wave
• Chiral Majorana Edge Modes and Vortex Majorana Zero Modes in Superconducting Antiferromagnetic Topological Insulator
• Crucial role of Internal Collective Modes in Underdoped Cuprates
• Anomalous Nodal Gap in a Doped Spin-1/2 Antiferromagnetic Mott Insulator