“Devil’s Staircase”-Type Phase Transition in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>NaV</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi>O</mml:mi></mml:mrow><mml:mrow><mml:mn>5</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>under High Pressure

Ohwada, Kenji; Fujii, Yasuhiko; Takesue, Naohisa; Isobe, Masahiko; Ueda, Yutaka; Nakao, Hironori; Wakabayashi, Yusuke; Murakami, Youichi; Ito, Kazuki; Amemiya, Yoshiyuki; Fujihisa, Hiroshi; Aoki, Kenneth H.; Shobu, Takahisa; Noda, Yukio; Ikeda, Naoshi

doi:10.1103/physrevlett.87.086402

Cited by 58 publications

(52 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The phase transition in NaV 2 O 5 quadruples the unit cell in the stacking direction, and the recent X-ray experiments, carried out deep in the ordered phase [23,33] revealed peculiar stacking ordering patterns of the super-antiferroelectrically charge-ordered planes. In addition, the pressure can change these patterns and even generate a multitude of higherorder commensurate superstructures in the stacking direction (devil's staircase) [29]. To explain these phenomena we proposed a 3D extension of the Ising sector with additional competing couplings between the nearest and nextnearest planes [24].…”

Section: Summary and Discussionmentioning

confidence: 99%

“…(28,29) there is no re-entrance when λ = 0. This is a well-known fact for the pure IMTF, as on the mean-field level, as well as beyond MFA [3,26].…”

Section: Re-entrancementioning

confidence: 99%

“…Indeed, combining Eqs. (28,29) we obtain the equation (29), thus no re-entrance. At λ = 0 continuous evolution of T c (g) between the regimes of strong Ising coupling and BCS-[cf.…”

Section: Re-entrancementioning

confidence: 99%

“…It appears experimentally that, e.g., external pressure cannot modify the in-plane parameters of NaV 2 O 5 strongly enough, such that re-entrance would be generated. The variations of the interlayer couplings under pressure, on the other hand, generate various types of order (including devil's staircase) with regard to the plane stacking, while the in-plane SAF order remains unaffected [24,29].…”

Section: Re-entrancementioning

confidence: 99%

See 3 more Smart Citations

Ordering in two-dimensional Ising models with competing interactions

Chitov

Gros

2005

Low Temperature Physics

View full text Add to dashboard Cite

We study the 2D Ising model on a square lattice with additional non-equal diagonal next-nearest neighbor interactions. The cases of classical and quantum (transverse) models are considered. Possible phases and their locations in the space of three Ising couplings are analyzed. In particular, incommensurate phases occurring only at non-equal diagonal couplings, are predicted. We also analyze a spin-pseudospin model comprised of the quantum Ising model coupled to XY spin chains in a particular region of interactions, corresponding to the Ising sector's super-antiferromagnetic (SAF) ground state. The spin-SAF transition in the coupled Ising-XY model into a phase with co-existent SAF Ising (pseudospin) long-range order and a spin gap is considered. Along with destruction of the quantum critical point of the Ising sector, the phase digram of the Ising-XY model can also demonstrate a re-entrance of the spin-SAF phase. A detailed study of the latter is presented. The mechanism of the re-entrance, due to interplay of interactions in the coupled model, and the conditions of its appearance are established. Applications of the spin-SAF theory for the transition in the quarter-filled ladder compound NaV2O5 are discussed.

show abstract

Section: Summary and Discussionmentioning

confidence: 99%

“…(28,29) there is no re-entrance when λ = 0. This is a well-known fact for the pure IMTF, as on the mean-field level, as well as beyond MFA [3,26].…”

Section: Re-entrancementioning

confidence: 99%

“…Indeed, combining Eqs. (28,29) we obtain the equation (29), thus no re-entrance. At λ = 0 continuous evolution of T c (g) between the regimes of strong Ising coupling and BCS-[cf.…”

Section: Re-entrancementioning

confidence: 99%

Section: Re-entrancementioning

confidence: 99%

See 2 more Smart Citations

Ordering in two-dimensional Ising models with competing interactions

Chitov

Gros

2005

Low Temperature Physics

View full text Add to dashboard Cite

show abstract

“…Then the metal to charge ordering transition must be accompanied with structural phase transition because inequivalent transition metal sites with different valences are arranged periodically in the charge ordered state. [1][2][3] However, in several materials including the transition metal ions with non-integer valences and non-metallic conductivities, superlattice reflection and/or structural phase transition showing charge ordering are not observed. [4,5] It is expected that because the electrons are localized only with a short-range ordering in such materials, the arrangement of the inequivalent sites with the different valences also has shortrange correlation, resulting in the absence of superlattice Bragg reflection.…”

Section: Introductionmentioning

confidence: 99%

Local Lattice Distortion Caused by Short-Range Charge Ordering in Transition Metal Oxides

Igawa¹,

Shamoto²,

Ikeda³

et al. 2015

Proceedings of the 2nd International Symposium on Science at J-Parc — Unlocking the Mysteries of Life, Matter and the Universe

View full text Add to dashboard Cite

We have performed local structural analysis by using the atomic pair distribution function (PDF) on LiMn 2 O 4 and YBaCo 2 O 5 which contain the single Mn and Co sites with the half-integer valences of +3.5 and +2.5, respectively, to reveal the local lattice distortion caused by the short-range charge ordering. The local structure of cubic spinel compound LiMn 2 O 4 at room temperature determined by the PDF analysis has an orthorhombic lattice distortion and includes inequivalent Mn sites with the valences of +3 and +4. The local structure of tetragonal phase of YBaCo 2 O 5 at 450 K has an orthorhombic lattice distortion including the inequivalent Co 2+ and Co 3+ sites. These results suggest that the valence electrons are localized at their transition metal sites only with short-range correlation, resulting in the non-metallic conductivity in these materials.

show abstract

First Step Towards a Devil's Staircase in Spin‐Crossover Materials

et al. 2016

View full text Add to dashboard Cite

The unprecedented bimetallic 2D coordination polymer {Fe[(Hg(SCN)3)2](4,4′‐bipy)2}n exhibits a thermal high‐spin (HS)↔low‐spin (LS) staircase‐like conversion characterized by a multi‐step dependence of the HS molar fraction γHS. Between the fully HS (γHS=1) and LS (γHS=0) phases, two steps associated with different ordering appear in terms of spin‐state concentration waves (SSCW). On the γHS≈0.5 step, a periodic SSCW forms with a HS‐LS‐HS‐LS sequence. On the γHS≈0.34 step, the 4D superspace crystallography structural refinement reveals an aperiodic SSCW, with a HS‐LS sequence incommensurate with the molecular lattice. The formation of these different long‐range spatially ordered structures of LS and HS states during the multi‐step spin‐crossover is discussed within the framework of “Devil's staircase”‐type transitions. Spatially modulated phases are known in various types of materials but are uniquely related to molecular HS/LS bistability in this case.

show abstract

“Devil’s Staircase”-Type Phase Transition inNaV2O5under High Pressure

Cited by 58 publications

References 21 publications

Ordering in two-dimensional Ising models with competing interactions

Ordering in two-dimensional Ising models with competing interactions

Local Lattice Distortion Caused by Short-Range Charge Ordering in Transition Metal Oxides

First Step Towards a Devil's Staircase in Spin‐Crossover Materials

Contact Info

Product

Resources

About