Entropy of the quantum soliton lattice and multiple magnetization steps in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi mathvariant="normal">BiCu</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">PO</mml:mi><mml:mn>6</mml:mn></mml:msub></mml:math>

Kohama, Yoshimitsu; Mochidzuki, Kazuhiro; Terashima, T.; Miyata, Atsuhiko; Demuer, A.; Klein, Thierry; Marcenat, C.; Dun, Zhiling; Zhou, H. D.; Li, Gang; Balicas, Luis; Abe, Noritaka; Matsuda, Yasuhiro H.; Takeyama, S.; Matsuo, Akira; Kindo, Koichi

doi:10.1103/physrevb.90.060408

Cited by 23 publications

(25 citation statements)

References 17 publications

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“…The application of magnetic field then leads to reduction in the spin gap (Fig. 1b) and induces cascades of magnetic phase transitions above critical magnetic fields μ 0 H c = 20–24 T, the values of which depend on the direction of the applied field2122.…”

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confidence: 99%

Giant suppression of phononic heat transport in a quantum magnet BiCu2PO6

Jeon

Koteswararao

Park

et al. 2016

Sci Rep

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Thermal transport of quantum magnets has elucidated the nature of low energy elementary excitations and complex interplay between those excited states via strong scattering of thermal carriers. BiCu2PO6 is a unique frustrated spin-ladder compound exhibiting highly anisotropic spin excitations that contain both itinerant and localized dispersion characters along the b- and a-axes respectively. Here, we investigate thermal conductivity κ of BiCu2PO6 under high magnetic fields (H) of up to 30 tesla. A dip-feature in κ, located at ~15 K at zero-H along all crystallographic directions, moves gradually toward lower temperature (T) with increasing H, thus resulting in giant suppression by a factor of ~30 near the critical magnetic field of Hc ≅ 23.5 tesla. The giant H- and T-dependent suppression of κ can be explained by the combined result of resonant scattering of phononic heat carriers with magnetic energy levels and increased phonon scattering due to enhanced spin fluctuation at Hc, unequivocally revealing the existence of strong spin-phonon coupling. Moreover, we find an experimental indication that the remaining magnetic heat transport along the b-axis becomes almost gapless at the magnetic quantum critical point realized at Hc.

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confidence: 99%

Giant suppression of phononic heat transport in a quantum magnet BiCu2PO6

Jeon

Koteswararao

Park

et al. 2016

Sci Rep

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“…[3][4][5][6][7][8][9] Recently, MCE measurements have been combined with pulse magnetic fields and applied to various research in physics at high fields. [10][11][12][13][14][15] In the adiabatic MCE, the temperature change ∆T can be divided into reversible and irreversible terms [16][17][18] as ∆T = ∆T rev + ∆T irr .…”

Section: Introductionmentioning

confidence: 99%

“…The surplus energy can be obtained from µ 0 BdM, which mainly results in the heating as hysteresis loss. 20,21 In previous studies, [3][4][5][6][7][8][9][10][11][12][13][14][15] the authors were mainly interested in ∆T rev , which reveals isentropes in the magnetic fieldtemperature (B-T ) plane. The discontinuity in the isentropes indicates the phase boundary in the B-T phase diagram.…”

Section: Introductionmentioning

confidence: 99%

Irreversible Heating Measurement with Microsecond Pulse Magnet: Example of the α–θ Phase Transition of Solid Oxygen

et al. 2016

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Dissipation inevitably occurs in first-order phase transitions, leading to irreversible heating. Conversely, the irreversible heating effect may indicate the occurrence of the first-order phase transition. We measured the temperature change at the magnetic-field-induced α-θ phase transition of solid oxygen. A significant temperature increase from 13 to 37 K, amounting to 700 J/mol, due to irreversible heating was observed at the first-order phase transition. We argue that the hysteresis loss of the magnetization curve and the dissipative structural transformation account for the irreversible heating. The measurement of irreversible heating can be utilized to detect the first-order phase transition in combination with an ultrahigh magnetic fields generated in a time of µs order.

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“…[1,2] According to the report, since the phase transitions in high magnetic fields accompany structural phase transitions, a coupling of lattice degree of freedom is crucial to understand them. On the other hand, there are also other sequential transitions without structural change in low magnetic fields.…”

Section: Introductionmentioning

confidence: 99%

Lifshitz Transition Induced by Magnetic Field in Frustrated Two-Leg Spin-Ladder Systems

Sugimoto

Mori

Tohyama

et al. 2015

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

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The magnetization curve in a frustrated two-leg spin-ladder system is theoretically studied using both analytical and numerical methods. This spin system is mapped onto a hard-core boson system, which is composed of bond-operators describing the triplon excitation. By the analytical method using the mean-field theory on the bond-operators, we show that cusp singularities emerge in the magnetization curve as a function of a magnetic field due to the strong frustration. This originates from a change of number of Fermi points in the bosonic dispersion relation with the applied field. It is analogous to Lifshitz transition. This singularity is clarified by numerical calculation with the density-matrix renormalization-group method. Our results will be useful to understand the magnetization process observed in the frustrated two-leg spin-ladder compound BiCu 2 PO 6 .

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Entropy of the quantum soliton lattice and multiple magnetization steps inBiCu2PO6

Cited by 23 publications

References 17 publications

Giant suppression of phononic heat transport in a quantum magnet BiCu2PO6

Giant suppression of phononic heat transport in a quantum magnet BiCu2PO6

Irreversible Heating Measurement with Microsecond Pulse Magnet: Example of the α–θ Phase Transition of Solid Oxygen

Lifshitz Transition Induced by Magnetic Field in Frustrated Two-Leg Spin-Ladder Systems

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