Chiral Spin Liquid Ground State in 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>YBaCo</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi>FeO</mml:mi></mml:mrow><mml:mrow><mml:mn>7</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

Schweika, W.; Valldor, Martin; Reim, Johannes; Rößler, U.

doi:10.1103/physrevx.12.021029

Cited by 6 publications

(3 citation statements)

References 82 publications

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“…This is a perfect example of how sensitive the magnetic lattices in the swedenborgites are to minor structural and compositional changes. The title compound exhibits a long-range spin-ordered ground state, while YBaCo 3 FeO 7 possesses a unique magnetic ground state with partial spin order [11]. By further changing the elemental composition but conserving the hexagonal (or trigonal) swedenborgite lattice, the magnetic ground state can be affected; the parent compound YBaCo 4 O 7 [9] is reported with both long-range magnetic order [34][35][36] and with short-range ordering [9,37].…”

Section: Discussionmentioning

confidence: 99%

“…By introducing Ca at the Y site, thus changing also the average oxidation state of Co, diffuse neutron scattering was reported for partial replacement [38,39], and a structural transition with longrange magnetic ordering was observed for the composition CaBaCo 4 O 7 [40]. When replacing Co in YBaCo 4 O 7 , a manifold of magnetic ground states has been reported: a spin-liquid in YBaCo 3 FeO 7 [11], a mixture of long-and short-range ordering in CaBaCo 2 Fe 2 O 7 [13], and further. As the swedenborgites are reported with various oxygen compositions, from stoichiometric 7.0 up to ∼8.5 [29,41], the oxidation states of the magnetic ions can be further controlled, with consequences for the magnetic properties (see, for example, Ref.…”

Section: Discussionmentioning

confidence: 99%

“…In this hexagonal compound, only short-range magnetic order was observed based on the diffuse neutron scattering from powder samples, and by diluting the magnetic lattice with a nonmagnetic ion in YBa(Co 4−x Zn x )O 7 (x = 0-3), the properties gradually change into a spin-glass [9,10]. A chiral spin-liquid ground state has been reported for YBaCo 3 FeO 7 in which antisymmetric magnetic diffuse scattering was observed using single-crystal neutron diffraction with XYZ polarization analysis [11]. CaBaCo 2 Fe 2 O 7 , on the other hand, remains hexagonal at all investigated temperatures [12] but reveals a long-range magnetic order below T N = 160 K (typically referred to as the √ 3 × √ 3 structure), * qureshi@ill.fr at least partially, since a significant amount of diffuse scattering was still present between the magnetic Bragg peaks [13] at low temperatures.…”

Section: Introductionmentioning

confidence: 99%

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Magnetic structure of the swedenborgite compound CaBaMn2Fe2O7 derived by powder neutron diffraction and Mössbauer spectroscopy

Qureshi

Morrow²,

Valldor³

et al. 2022

Phys. Rev. B

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We present a study combining neutron diffraction and 57 Fe Mössbauer spectroscopy on a powder sample of CaBaMn 2 Fe 2 O 7 belonging to the large family of swedenborgite compounds. The undistorted hexagonal crystal structure (space group P6 3 mc) is preserved down to low temperatures, and all employed techniques reveal a transition into a magnetically long-range ordered phase at T N = 205 K. The magnetic Bragg peak intensities from the powder diffraction patterns together with a symmetry analysis of the employed models unambiguously reveal the classical √ 3 × √ 3 magnetic structure on a hexagonal lattice with propagation vector q = ( 1 3 1 3 0). The nuclear Bragg peak intensities allowed the statistical distribution of Fe and Mn ions on both trigonal and kagome sites of the complex swedenborgite structure to be analyzed which was considered to explain the complex shape of the Mössbauer spectra.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Magnetic structure of the swedenborgite compound CaBaMn2Fe2O7 derived by powder neutron diffraction and Mössbauer spectroscopy

Qureshi

Morrow²,

Valldor³

et al. 2022

Phys. Rev. B

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Unveiling chiral states in the XXZ chain: finite-size scaling probing symmetry-enriched c = 1 conformal field theories

Wei,

Mkhitaryan,

Sedrakyan

2024

J. High Energ. Phys.

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We study the low-energy properties of the one-dimensional spin-1/2 XXZ chain with time-reversal symmetry-breaking pseudo-scalar chiral interaction and propose a phase diagram for the model. In the integrable case of the isotropic Heisenberg model with the chiral interaction, we employ the thermodynamic Bethe ansatz to find “chiralization”, the response of the ground state versus the strength of the pseudo-scalar chiral interaction of a chiral Heisenberg chain. Unlike the magnetization case, the chirality of the ground state remains zero until the transition point corresponding to critical coupling αc = 2J/π with J being the antiferromagnetic spin-exchange interaction. The central-charge c = 1 conformal field theories (CFTs) describe the two phases with zero and finite chirality. We show for this particular case and conjecture more generally for similar phase transitions that the difference between two emergent CFTs with identical central charges lies in the symmetry of their ground state (lightest weight) primary fields, i.e., the two phases are symmetry-enriched CFTs. At finite but small temperatures, the non-chiral Heisenberg phase acquires a finite chirality that scales with the temperature quadratically. We show that the finite-size effect around the transition point probes the transition.

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Green's function method for the two-dimensional frustrated spin- 12 Heisenberg magnetic lattice

2022

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Chiral Spin Liquid Ground State in YBaCo3FeO7

Cited by 6 publications

References 82 publications

Magnetic structure of the swedenborgite compound CaBaMn2Fe2O7 derived by powder neutron diffraction and Mössbauer spectroscopy

Magnetic structure of the swedenborgite compound CaBaMn2Fe2O7 derived by powder neutron diffraction and Mössbauer spectroscopy

Unveiling chiral states in the XXZ chain: finite-size scaling probing symmetry-enriched c = 1 conformal field theories

Green's function method for the two-dimensional frustrated spin- 12 Heisenberg magnetic lattice

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