skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Intertwined charge, spin, and pairing orders in doped iron ladders

Journal Article · · Physical Review B

Motivated by recent experimental progress on iron-based ladder compounds, we study the doped two-orbital Hubbard model for the two-leg ladder BaFe2S3. The model is constructed by using ab initio hopping parameters and the ground state properties are investigated using the density matrix renormalization group method. We show that the (π,0) magnetic ordering at half filling, with ferromagnetic rungs and antiferromagnetic legs, becomes incommensurate upon hole doping. Moreover, depending on the strength of the Hubbard U coupling, other magnetic patterns, such as (0,π), are also stabilized. We found that the binding energy for two holes becomes negative for intermediate Hubbard interaction strength, indicating hole pairing. Due to the crystal-field split among orbitals, the holes primarily reside in one orbital, with the other one remaining half filled. This resembles orbital selective Mott states. The formation of tight hole pairs continues with increasing hole density, as long as the magnetic order remains antiferromagnetic in one direction. The study of pair-pair correlations indicates the dominance of the intraorbital spin-singlet channel, as opposed to other pairing channels. Although in a range of hole doping pairing correlations decay slowly, our results can also be interpreted as corresponding to a charge density wave made of pairs, a precursor of eventual superconductivity after interladder couplings are included. Such a scenario of intertwined orders has been extensively discussed before in the cuprates, and our results suggest a similar physics could exist in ladder iron-based superconductors. Finally, we also show that a robust Hund's coupling is needed for pairing to occur.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1807213
Journal Information:
Physical Review B, Vol. 103, Issue 21; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (70)

Unveiling New Magnetic Phases of Undoped and Doped Manganites journal June 2003
Projector augmented-wave method journal December 1994
Block antiferromagnetism and checkerboard charge ordering in the alkali-doped iron selenides R 1 x Fe 2 y Se 2 journal March 2012
Hole and pair structures in the t-J model journal March 1997
wannier90: A tool for obtaining maximally-localised Wannier functions journal May 2008
Block Magnetic Excitations in the Orbitally Selective Mott Insulator BaFe 2 Se 3 journal July 2015
Magnetic Precursor of the Pressure-Induced Superconductivity in Fe-Ladder Compounds journal July 2016
Pressure-induced superconductivity in the iron-based ladder material BaFe2S3 journal July 2015
Spin-gap proximity effect mechanism of high-temperature superconductivity journal September 1997
From ultrasoft pseudopotentials to the projector augmented-wave method journal January 1999
Evidence for Strong Itinerant Spin Fluctuations in the Normal State of CeFeAsO 0.89 F 0.11 Iron-Oxypnictide Superconductors journal December 2008
Superconductivity in a model of two Hubbard chains coupled with ferromagnetic exchange interaction journal June 2008
Iron-Based Layered Superconductor La[O 1- x F x ]FeAs ( x = 0.05−0.12) with T c = 26 K journal March 2008
Magnetic states of the two-leg-ladder alkali metal iron selenides A Fe 2 Se 3 journal January 2013
Unconventional Pairing Originating from the Disconnected Fermi Surfaces of Superconducting LaFeAsO 1 x F x journal August 2008
Maximally localized generalized Wannier functions for composite energy bands journal November 1997
The density matrix renormalization group for strongly correlated electron systems: A generic implementation journal September 2009
Fingerprints of an orbital-selective Mott phase in the block magnetic state of BaFe2Se3 ladders journal June 2019
The electronic phase diagram of the LaO1−xFxFeAs superconductor journal February 2009
Block magnetism coupled with local distortion in the iron-based spin-ladder compound BaFe 2 Se 3 journal February 2012
Superconductivity in the iron selenide K x Fe 2 Se 2 ( 0 x 1.0 ) journal November 2010
Surprises on the Way from One- to Two-Dimensional Quantum Magnets: The Ladder Materials journal February 1996
Density matrix formulation for quantum renormalization groups journal November 1992
Doped Stripes in Models for the Cuprates Emerging from the One-Hole Properties of the Insulator journal June 2000
High-temperature superconductivity in iron-based materials journal August 2010
Spin dynamics of the block orbital-selective Mott phase journal September 2018
Superconductivity in iron compounds journal December 2011
Iron displacements and magnetoelastic coupling in the antiferromagnetic spin-ladder compound BaFe 2 Se 3 journal November 2011
Superconductivity Tuned by the Iron Vacancy Order in K x Fe 2− y Se 2 journal February 2013
Superconductivity at 41 K and Its Competition with Spin-Density-Wave Instability in Layered CeO 1 x F x FeAs journal June 2008
Constructing quasiparticle operators in strongly correlated systems journal April 1991
Signatures of pairing in the magnetic excitation spectrum of strongly correlated two-leg ladders journal November 2017
Gap symmetry and structure of Fe-based superconductors journal October 2011
Superconductivity at 43 K in an iron-based layered compound LaO1-xFxFeAs journal April 2008
Density Matrix Renormalization Group Study of the Striped Phase in the 2D t J Model journal February 1998
Superconductivity close to magnetic instability in Fe ( Se 1 x Te x ) 0.82 journal December 2008
Colloquium : The unexpected properties of alkali metal iron selenide superconductors journal May 2013
Incommensurate Spin Fluctuations in Hole-Overdoped Superconductor KFe 2 As 2 journal February 2011
Exotic Magnetic Order in the Orbital-Selective Mott Regime of Multiorbital Systems journal March 2014
Mechanism of high-temperature superconductivity in a striped Hubbard model journal June 2004
Superconductivity in ladders and coupled planes journal March 1992
Superconductivity gets an iron boost journal March 2010
Colloquium : Theory of intertwined orders in high temperature superconductors journal May 2015
Superconductivity in the PbO-type structure  -FeSe journal September 2008
Superconductivity in the Ladder Material Sr 0.4 Ca 13.6 Cu 24 O 41.84 journal September 1996
Magnetic properties and pairing tendencies of the iron-based superconducting ladder BaFe 2 S 3 : Combined ab initio and density matrix renormalization group study journal August 2016
Fe-based superconductivity with T c =31 K bordering an antiferromagnetic insulator in (Tl,K) Fe x Se 2 journal April 2011
Anisotropy in BaFe 2 Se 3 single crystals with double chains of FeSe tetrahedra journal December 2011
Novel Magnetic Block States in Low-Dimensional Iron-Based Superconductors journal July 2019
Coexistence of pairing tendencies and ferromagnetism in a doped two-orbital Hubbard model on two-leg ladders journal February 2010
Iron-Based Layered Superconductor:  LaOFeP journal August 2006
Common Crystalline and Magnetic Structure of Superconducting A 2 Fe 4 Se 5 ( A = K , Rb , Cs , Tl ) Single Crystals Measured Using Neutron Diffraction journal September 2011
Spin glass and semiconducting behavior in one-dimensional BaFe 2 δ Se 3 ( δ 0.2 ) crystals journal December 2011
Prediction of exotic magnetic states in the alkali-metal quasi-one-dimensional iron selenide compound Na 2 FeSe 2 journal July 2020
Correlated electrons in high-temperature superconductors journal July 1994
A Novel Large Moment Antiferromagnetic Order in K 0.8 Fe 1.6 Se 2 Superconductor journal August 2011
Indications of spin-charge separation at short distance and stripe formation in the extended t-J model on ladders and planes journal December 2000
Restoring the Density-Gradient Expansion for Exchange in Solids and Surfaces journal April 2008
The Physics of Pair-Density Waves: Cuprate Superconductors and Beyond journal March 2020
Optical Study of the Sr 1 4 x Ca x Cu 24 O 41 System: Evidence for Hole-Doped Cu 2 O 3 Ladders journal March 1997
Pressure-Induced Mott Transition Followed by a 24-K Superconducting Phase in BaFe 2 S 3 journal December 2015
Orbital-selective magnetism in the spin-ladder iron selenides Ba 1 x K x Fe 2 Se 3 journal May 2012
Electronic origin of high-temperature superconductivity in single-layer FeSe superconductor journal January 2012
Emergence of superconductivity in doped multiorbital Hubbard chains journal May 2020
Magnetism and its microscopic origin in iron-based high-temperature superconductors journal October 2012
Iron telluride ladder compounds: Predicting the structural and magnetic properties of BaFe 2 Te 3 journal April 2020
Magnetic states of iron-based two-leg ladder tellurides journal November 2019
Magnetoelastic coupling in the phase diagram of Ba 1 x K x Fe 2 As 2 as seen via neutron diffraction journal May 2011
The puzzle of high temperature superconductivity in layered iron pnictides and chalcogenides journal October 2010
Block–spiral magnetism: An exotic type of frustrated order journal June 2020