Valence-bond-glass state with a singlet gap in the spin-
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 square-lattice random 
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 Heisenberg antiferromagnet 
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Watanabe, Masari; Kurita, Nobuyuki; Tanaka, Hidekazu; Ueno, Wataru; Matsui, Kazuki; Goto, Takayuki

doi:10.1103/physrevb.98.054422

Cited by 35 publications

(54 citation statements)

References 53 publications

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“…16,19,[21][22][23][24] Upon introducing a mixture of W 6+ and Te 6+ , the material evades ordering over a wide portion (x = 0.05 -0.6) of the Sr2CuTe1-xWxO6 solution. 7,10,[25][26][27][28] The 50:50 mixture Sr2CuTe0.5W0.5O6 closely resembles a quantum spin-liquid, an exotic magnetic state where the moments remain dynamic at zero Kelvin and have been highly sought since they were first proposed in the 1970s. [29][30][31][32] The question remains whether similarly exotic magnetic behavior can be introduced by d 10 /d 0 doping in other magnetic lattices than the square-lattice, and whether this can be extended from perovskites to perovskite-derived structures?…”

Section: Cations and O 2p Orbitals (Ie B'-o-b''-o-b')mentioning

confidence: 99%

Site-Selective d¹⁰/d⁰ Substitution in an S = ¹/₂ Spin Ladder Ba₂CuTe_1–xW_xO₆ (0 ≤ x ≤ 0.3)

et al. 2022

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Section: Cations and O 2p Orbitals (Ie B'-o-b''-o-b')mentioning

confidence: 99%

Site-Selective d¹⁰/d⁰ Substitution in an S = ¹/₂ Spin Ladder Ba₂CuTe_1–xW_xO₆ (0 ≤ x ≤ 0.3)

et al. 2022

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“…On the other hand, it has random singlet (RS) state [42][43][44][45] if there is a randomness, a distribution of next-nearest site couplings. Whether a RS like state has a gap or not depends on the details of the lattice symmetry as well as the size of the randomness [46][47][48][49][50][51][52]. Our philosophy is to bypass all such details and characterize the system only by a few order parameter, assuming this is possible at least near the critical points.…”

Section: Parity Symmetry Breaking Casementioning

confidence: 99%

Ginzberg-Landau-Wilson theory for flat band, Fermi-arc and surface states of strongly correlated systems

Seo

Yuk

et al. 2021

J. High Energ. Phys.

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We show that we can realize the surface state together with the bulk state of various types of topological matters in holographic context, by considering various types of Lorentz symmetry breaking. The fermion spectral functions in the presence of order show features like the gap, pseudo-gap, flat disk bands and the Fermi-arc connecting the two Dirac cones, which are familiar in Weyl and Dirac materials or Kondo lattice. Many of above features are associated with the zero modes whose presence is tied with a discrete symmetry of the interaction and these zero modes are associated with the surface states. Some of the order parameters in the bulk theory do not have an interpretation of symmetry breaking in terms of the boundary space, which opens the possibility of ‘an order without symmetry breaking’. We also pointed out that the spectrum of the symmetry broken phase mimics that of weakly interacting theory, although their critical version describe the strongly interacting system.

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“…Another interesting example is Sr CuTeO , a quasi-two dimensional Heisenberg antiferromagnet, where Cu ( S = 1/2) ions form a planar square lattice and develop Néel order below 29 K 35 . Interestingly, magnetic susceptibility, specific heat and SR studies on Sr CuTe W O demonstrated a quantum disordered ground state for x = 0.5 36 . This is a promising candidate to tune electron correlation by quenched disorder in the J - J Heisenberg model on a square lattice.…”

Section: Introductionmentioning

confidence: 99%

Development of short and long-range magnetic order in the double perovskite based frustrated triangular lattice antiferromagnet Ba$$_{2}$$MnTeO$$_{6}$$

Khatua

Arh

Mishra

et al. 2021

Sci Rep

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Frustrated magnets based on oxide double perovskites offer a viable ground wherein competing magnetic interactions, macroscopic ground state degeneracy and complex interplay between emergent degrees of freedom can lead to correlated quantum phenomena with exotic excitations highly relevant for potential technological applications. By local-probe muon spin relaxation ($$\mu$$ μ SR) and complementary thermodynamic measurements accompanied by first-principles calculations, we here demonstrate novel electronic structure and magnetic phases of Ba$$_{2}$$ 2 MnTeO$$_{6}$$ 6 , where Mn$$^{2+}$$ 2 + ions with S = 5/2 spins constitute a perfect triangular lattice. Magnetization results evidence the presence of strong antiferromagnetic interactions between Mn$$^{2+}$$ 2 + spins and a phase transition at $$T_{N}$$ T N = 20 K. Below $$T_{N}$$ T N , the specific heat data show antiferromagnetic magnon excitations with a gap of 1.4 K, which is due to magnetic anisotropy. $$\mu$$ μ SR reveals the presence of static internal fields in the ordered state and short-range spin correlations high above $$T_{N}$$ T N . It further unveils critical slowing-down of spin dynamics at $$T_{N}$$ T N and the persistence of spin dynamics even in the magnetically ordered state. Theoretical studies infer that Heisenberg interactions govern the inter- and intra-layer spin-frustration in this compound. Our results establish that the combined effect of a weak third-nearest-neighbour ferromagnetic inter-layer interaction (owing to double-exchange) and intra-layer interactions stabilizes a three-dimensional magnetic ordering in this frustrated magnet.

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Valence-bond-glass state with a singlet gap in the spin- 12 square-lattice random J1−J2 Heisenberg antiferromagnet
Masari Watanabe
¹
,
Nobuyuki Kurita
²
,
Hidekazu Tanaka
³

et al.

Cited by 35 publications

References 53 publications

Site-Selective d¹⁰/d⁰ Substitution in an S = ¹/₂ Spin Ladder Ba₂CuTe_1–xW_xO₆ (0 ≤ x ≤ 0.3)

Site-Selective d¹⁰/d⁰ Substitution in an S = ¹/₂ Spin Ladder Ba₂CuTe_1–xW_xO₆ (0 ≤ x ≤ 0.3)

Ginzberg-Landau-Wilson theory for flat band, Fermi-arc and surface states of strongly correlated systems

Development of short and long-range magnetic order in the double perovskite based frustrated triangular lattice antiferromagnet Ba$$_{2}$$MnTeO$$_{6}$$

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Valence-bond-glass state with a singlet gap in the spin- 12 square-lattice random J1−J2 Heisenberg antiferromagnet Masari Watanabe1, Nobuyuki Kurita2, Hidekazu Tanaka3 et al.

Cited by 35 publications

References 53 publications

Site-Selective d10/d0 Substitution in an S = 1/2 Spin Ladder Ba2CuTe1–xWxO6 (0 ≤ x ≤ 0.3)

Site-Selective d10/d0 Substitution in an S = 1/2 Spin Ladder Ba2CuTe1–xWxO6 (0 ≤ x ≤ 0.3)

Ginzberg-Landau-Wilson theory for flat band, Fermi-arc and surface states of strongly correlated systems

Development of short and long-range magnetic order in the double perovskite based frustrated triangular lattice antiferromagnet Ba$$_{2}$$MnTeO$$_{6}$$

Contact Info

Product

Resources

About

Valence-bond-glass state with a singlet gap in the spin- 12 square-lattice random J1−J2 Heisenberg antiferromagnet
Masari Watanabe
¹
,
Nobuyuki Kurita
²
,
Hidekazu Tanaka
³

et al.

Site-Selective d¹⁰/d⁰ Substitution in an S = ¹/₂ Spin Ladder Ba₂CuTe_1–xW_xO₆ (0 ≤ x ≤ 0.3)

Site-Selective d¹⁰/d⁰ Substitution in an S = ¹/₂ Spin Ladder Ba₂CuTe_1–xW_xO₆ (0 ≤ x ≤ 0.3)