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Title: Impurity effects on local electronic structure of twisted bilayer cuprates

Journal Article · · Physical Review. B

It has been recently proposed that a fully gapped d-wave superconducting phase emerges in twisted bilayer cuprates when twist angle is in the vicinity of 45°. By considering a twisted bilayer model with a moiré cell, we study the local electronic structure around a single-site impurity and impurity dimer in both topologically trivial and nontrivial superconducting states. Here we find that the topological nontrivial superconducting phase is robust against single scalar-potential impurity scattering but is very sensitive to the interlayer impurity dimer scattering, which avoids and enforces the creation of the subgap quasiparticle state. This behavior is intrinsic to the bilayer structure and topological nature, in contrast to the other types of impurities that inevitably bring subgap quasiparticle states. We expect that our results can contribute to the understanding of electronic properties of twisted bilayer cuprates systems.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
89233218CNA000001
OSTI ID:
2475605
Report Number(s):
LA-UR--24-22121
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Journal Issue: 13 Vol. 110; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (66)

Encapsulating High‐Temperature Superconducting Twisted van der Waals Heterostructures Blocks Detrimental Effects of Disorder journal January 2023
Bogoliubov-de Gennes Method and Its Applications book January 2016
Impurity- and magnetic-field-induced quasiparticle states in chiral p-wave superconductors journal May 2017
Theory of dirty superconductors journal September 1959
Effect of spin–orbit impurity scattering in d-wave superconductors journal May 2001
Local structure of impurity states in d-wave superconductors journal November 2000
Twisted cuprate van der Waals heterostructures with controlled Josephson coupling journal July 2023
Modulations of orders around magnetic impurities in high-temperature superconductors journal September 2010
Correlated insulator behaviour at half-filling in magic-angle graphene superlattices journal March 2018
Unconventional superconductivity in magic-angle graphene superlattices journal March 2018
Anomalous Hall effect, magneto-optical properties, and nonlinear optical properties of twisted graphene systems journal May 2020
Chern insulators, van Hove singularities and topological flat bands in magic-angle twisted bilayer graphene journal February 2021
Correlated electronic phases in twisted bilayer transition metal dichalcogenides journal June 2020
High-temperature topological superconductivity in twisted double-layer copper oxides journal February 2021
Superconductors, orbital magnets and correlated states in magic-angle bilayer graphene journal October 2019
High-temperature superconductivity in monolayer Bi2Sr2CaCu2O8+δ journal October 2019
Strongly correlated Chern insulators in magic-angle twisted bilayer graphene journal December 2020
Signatures of fractional quantum anomalous Hall states in twisted MoTe2 journal June 2023
Nematic superconductivity in magic-angle twisted bilayer graphene from atomistic modeling journal April 2022
Interaction effects and superconductivity signatures in twisted double-bilayer WSe 2 journal January 2020
Correlated insulating phases in the twisted bilayer graphene* journal January 2021
Josephson effects in twisted cuprate bilayers journal February 2022
Doping phase diagram of a Hubbard model for twisted bilayer cuprates journal June 2022
Doping a moiré Mott insulator: A t−J model study of twisted cuprates journal May 2022
Twisted multilayer nodal superconductors journal July 2022
Chiral Majorana modes via proximity to a twisted cuprate bilayer journal November 2022
Bound states around impurities in a superconducting bilayer journal April 2023
Magic angles and correlations in twisted nodal superconductors journal May 2023
High-temperature Majorana corner modes in a d+id′ superconductor heterostructure: Application to twisted bilayer cuprate superconductors journal June 2023
Impurity and vortex states in the bilayer high-temperature superconductor La3Ni2O7 journal November 2023
Inhomogeneity-induced time-reversal symmetry breaking in cuprate twist junctions journal September 2023
Doping dependence of chiral superconductivity in near 45∘ twisted bilayer cuprates journal January 2024
Impurity scattering and localization in d -wave superconductors journal September 1996
Spectral properties of quasiparticle excitations induced by magnetic moments in superconductors journal May 1997
Magnetic impurities ind-wave superconductors journal October 1999
Quasiparticle resonant states induced by a unitary impurity in a d -wave superconductor journal April 2000
Local quasiparticle states around an Anderson impurity in ad-wave superconductor: Kondo effects journal December 2000
Local quasiparticle states near a Zn impurity with induced magnetic moment in a high-Tcsuperconductor journal July 2001
Local magnetic moments around a nonmagnetic impurity in the two-dimensional t-J model journal September 2001
Zeeman effects on the impurity-induced resonances ind-wave superconductors journal January 2002
Single impurity effects in the mixed state ofd-wave superconductors journal August 2002
Interplay of quantum magnetic and potential scattering around Zn and Ni impurity ions in superconducting cuprates journal September 2002
Impurity and interface bound states indx2−y2+idxyandpx+ipysuperconductors journal March 2004
Electronic structure and spontaneous internal field around nonmagnetic impurities in spin-triplet chiralp-wave superconductors journal December 2005
Quasiparticle resonance states around a magnetic impurity in a two-dimensionalf-wave superconductor journal April 2008
Continuum model of the twisted graphene bilayer journal October 2012
Moiré impurities in twisted bilayer black phosphorus: Effects on the carrier mobility journal November 2017
Mean-field theory for superconductivity in twisted bilayer graphene journal December 2018
Polar Kerr Effect and Time Reversal Symmetry Breaking in Bilayer Graphene journal August 2011
Interpretation of Scanning Tunneling Quasiparticle Interference and Impurity States in Cuprates journal May 2015
Probing Time Reversal Symmetry Breaking Topological Superconductivity in Twisted Double Layer Copper Oxides with Polar Kerr Effect journal October 2021
High-Temperature Majorana Zero Modes journal March 2022
Localized states in a d -wave superconductor journal September 1993
Local Density of States around a Magnetic Impurity in High- T c Superconductors Based on the t − J Model journal April 2000
Impurity in a d -Wave Superconductor: Kondo Effect and STM Spectra journal January 2001
Impurity States and Interlayer Tunneling in High Temperature Superconductors journal February 2002
States of Local Moment Induced by Nonmagnetic Impurities in Cuprate Superconductors journal February 2004
Impurity-induced states in conventional and unconventional superconductors journal May 2006
Scanning tunneling spectroscopy of high-temperature superconductors journal March 2007
Tuning superconductivity in twisted bilayer graphene journal January 2019
Emergent ferromagnetism near three-quarters filling in twisted bilayer graphene journal July 2019
Stacking-engineered ferroelectricity in bilayer boron nitride journal May 2021
Time-reversal symmetry breaking superconductivity between twisted cuprate superconductors journal December 2023
Classical Spins in Superconductors journal September 1968
Spin-orbit scattering in d -wave superconductors journal November 1999
Nematic Superconductivity in Doped Bi2Se3 Topological Superconductors journal December 2018