Ground-State Properties of a Peierls–Hubbard Triangular Prism

Yamamoto, Shoji; Ohara, Jun; Ozaki, Masa‐aki

doi:10.1143/jpsj.79.044709

Cited by 10 publications

(5 citation statements)

References 50 publications

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“…Indeed, from a recent theoretical study on the MX-ladder system, it is also suggested that carrier (electron/hole) doping provides stabilization of characteristic electronic states. 65,74 Because the electronic ground state of nickel-based MX-chains is the Mott-Hubbard state, fabrication of MX-ladder-type nickel compounds would offer a variety of magnetic properties (i.e. spin ladders).…”

Section: Discussionmentioning

confidence: 99%

Structural design and electronic properties of halogen-bridged mixed-valence ladder systems with even numbers of legs

Otsubo

Kitagawa

2014

CrystEngComm

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Ladder materials situated in a dimensional crossover region have attracted significant attention because of their unique physical properties, which depend strongly on the number of their constituent legs. Among them, metal-organic halogen-bridged ladder systems are currently of particular interest. These new series of ladder materials are composed of two or four halogen-bridged transition-metal complexes, the so-called MX-chains, as legs that are connected to each other by organic rung units. To date, a variety of two-and four-legged halogen-bridged ladder compounds, called MX-ladders, have been synthesized. We present an overview of design strategies, crystal structures, and unique electronic properties of MX-ladder materials with even numbers of legs. Utilization of coordination chemistry provides a high number of structural and electronic degrees of freedom, a striking feature of the MX-ladder system compared with transition-metal-oxide ladder systems. Not only their structural features including tunability via rung substitution but also their unique electronic properties depending on the number of legs and electronic states have recently been revealed.

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Section: Discussionmentioning

confidence: 99%

Structural design and electronic properties of halogen-bridged mixed-valence ladder systems with even numbers of legs

Otsubo

Kitagawa

2014

CrystEngComm

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“…Thus, the chemical doping breaks the initial double periodicity, whereas the photodoping can tune the only interchain valence arrangement. We note that such a contrast may depend on the lattice geometry: tubular analog compounds, such as the three-legged and four-legged MX tubes [51,52], show the persistent π-modulated Peierls distortion under chemical doping. PtX ladder compounds with new interchain ligands have been recently synthesized [53].…”

Section: Summary and Discussionmentioning

confidence: 99%

Photocontrollable Mixed-Valent States in Platinum-Halide Ladder Compounds

Ohara

Yamamoto

2018

Applied Sciences

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Employing a two-orbital extended Peierls–Hubbard model, we demonstrate the photomanipulation of mixed-valent states in platinum-halide ladder compounds. There are two types of interchain valence arrangements, namely in-phase and out-of-phase types. The conversion of the in-phase structure to the out-of-phase structure is induced by photoirradiation, which is accelerated with increasing light intensity, while the reverse process hardly occurs. The out-of-phase arrangement is highly stabilized in the photoexcited states by the interchain electron transfer.

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“…There exists a variety of charge-ordering patterns: a CDW on the Cu sublattice (Γ-Cu-CDW), CDWs on the Mo sublattice [Γ-Mo-CDW, M-Mo-CDW(1), and M-Mo-CDW(2)], and CDWs on both the Mo and Cu sublattices [M-MoCu-CDW(1) and M-MoCu-CDW(2)]. They will be stabilized by predominant electron-phonon couplings or relevant intermetallic Coulomb interactions [34, 35]. We further find varied magnetic phases corresponding to the

Γ \overset{D}{true} false(Γ false) \otimes {\overset{S}{true}}^{normal1} \otimes {\overset{T}{true}}^{normal1}

and

M \overset{D}{true} false(M false) \otimes {\overset{S}{true}}^{normal1} \otimes {\overset{T}{true}}^{normal1}

representations.…”

Section: Model Hamiltonian and Its Symmetry Propertiesmentioning

confidence: 99%

Phototunable Magnetism in Copper Octacyanomolybdate

Ohara

Yamamoto

2014

The Scientific World Journal

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We introduce copper molybdenum cyanides of general formula Cu2[Mo(CN)8]·nH2O, which can serve as optofunctional magnetic devices. Their ground states generally stay paramagnetic down to temperatures of the K order but exhibit a spontaneous magnetization upon photoirradiation usually below a few tens of K. To interest us still further, such a ferromagnetic stateinduced by blue-laser irradiation is demagnetized step by step through further application of red or near-infrared laser pulses. We solve this intriguing photomagnetism. The ground-state properties are fully revealed by means of a group-theoretical technique. Taking account of experimental observations, we simulate applying pump laser pulses to a likely ground state and successfully reproduce both the magnetization and demagnetization dynamics. We monitor the photorelaxation process through angle-resolved photoemission spectroscopy. Electrons are fully itinerant in any of the photoinduced steady states, forming a striking contrast to the initial equilibrium state of atomic aspect. The fully demagnetized final steady state looks completely different from the initial paramagnetism but bears good analogy to one of the possible ground states available with the Coulomb repulsion on Cu sites suppressed.

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Ground-State Properties of a Peierls–Hubbard Triangular Prism

Cited by 10 publications

References 50 publications

Structural design and electronic properties of halogen-bridged mixed-valence ladder systems with even numbers of legs

Structural design and electronic properties of halogen-bridged mixed-valence ladder systems with even numbers of legs

Photocontrollable Mixed-Valent States in Platinum-Halide Ladder Compounds

Phototunable Magnetism in Copper Octacyanomolybdate

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