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Imajo S, Miyake A, Kurihara R, Tokunaga M, Kindo K, Horiuchi S, Kagawa F. Quantum Liquid States of Spin Solitons in a Ferroelectric Spin-Peierls State. PHYSICAL REVIEW LETTERS 2024; 132:096601. [PMID: 38489634 DOI: 10.1103/physrevlett.132.096601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 01/31/2024] [Indexed: 03/17/2024]
Abstract
In this study, we performed high-magnetic-field magnetization, dielectric, and ultrasound measurements on an organic salt showing a ferroelectric spin-Peierls (FSP) state, which is in close proximity to a quantum critical point. In contrast to the sparsely distributed gaslike spin solitons typically observed in conventional spin-Peierls (SP) states, the FSP state exhibits dense liquidlike spin solitons resulting from strong quantum fluctuations, even at low fields. Nevertheless, akin to conventional SP systems, a magnetic-field-induced transition is observed in the FSP state. In conventional high-field SP states, an emergent wave vector results in the formation of a spin-soliton lattice. However, in the present high-field FSP state, the strong quantum fluctuations preclude the formation of such a soliton lattice, causing the dense solitons to remain in a quantum-mechanically melted state. This observation implies the realization of a quantum liquid-liquid transition of topological particles carrying spin and charge in a ferroelectric insulator.
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Affiliation(s)
- Shusaku Imajo
- Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - Atsushi Miyake
- Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
- Institute for Materials Research, Tohoku University, Oarai, Ibaraki 311-1313, Japan
| | - Ryosuke Kurihara
- Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
- Department of Physics, Faculty of Science and Technology, Tokyo University of Science, Noda, Chiba 278-8510, Japan
| | - Masashi Tokunaga
- Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - Koichi Kindo
- Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - Sachio Horiuchi
- Research Institute of Advanced Electronics and Photonics (RIAEP), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan
| | - Fumitaka Kagawa
- Department of Physics, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan
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Shahee A, Sharma S, Kumar D, Yadav P, Bhardwaj P, Ghodke N, Singh K, Lalla NP, Chaddah P. Low-temperature high magnetic field powder x-ray diffraction setup for field-induced structural phase transition studies from 2 to 300 K and at 0 to 8-T field. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2016; 87:105110. [PMID: 27802723 DOI: 10.1063/1.4963843] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A low-temperature and high magnetic field powder x-ray diffractometer (XRD) has been developed at UGC-DAE CSR (UGC: University Grant Commission, DAE: Department of Atomic Energy, and CSR: Consortium for scientific research), Indore, India. The setup has been developed around an 18 kW rotating anode x-ray source delivering Cu-Kα x-rays coming from a vertical line source. It works in a symmetric θ-2θ parallel beam geometry. It consists of a liquid helium cryostat with an 8 T split-pair Nb-Ti superconducting magnet comprising two x-ray windows each covering an angular range of 65°. This is mounted on a non-magnetic type heavy duty goniometer equipped with all necessary motions along with data collection accessories. The incident x-ray beam has been made parallel using a parabolic multilayer mirror. The scattered x-ray is detected using a NaI detector through a 0.1° acceptance solar collimator. To control the motions of the goniometer, a computer programme has been developed. The wide-angle scattering data can be collected in a range of 2°-115° of 2θ with a resolution of ∼0.1°. The whole setup is tightly shielded for the scattered x-rays using a lead hutch. The functioning of the goniometer and the artifacts arising possibly due to the effect of stray magnetic field on the goniometer motions, on the x-ray source, and on the detector have been characterized by collecting powder XRD data of a National Institute of Standards and Technology certified standard reference material LaB6 (SRM-660b) and Si powder in zero-field and in-field conditions. Occurrence of field induced structural-phase transitions has been demonstrated on various samples like Pr0.5Sr0.5MnO3, Nd0.49Sr0.51MnO3-δ and La0.175Pr0.45Ca0.375MnO3 by collecting data in zero field cool and field cool conditions.
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Affiliation(s)
- Aga Shahee
- UGC-DAE Consortium for Scientific Research, University Campus, Khandawa Road, Indore, MP 452001, India
| | - Shivani Sharma
- UGC-DAE Consortium for Scientific Research, University Campus, Khandawa Road, Indore, MP 452001, India
| | - Dhirendra Kumar
- UGC-DAE Consortium for Scientific Research, University Campus, Khandawa Road, Indore, MP 452001, India
| | - Poonam Yadav
- UGC-DAE Consortium for Scientific Research, University Campus, Khandawa Road, Indore, MP 452001, India
| | - Preeti Bhardwaj
- UGC-DAE Consortium for Scientific Research, University Campus, Khandawa Road, Indore, MP 452001, India
| | - Nandkishor Ghodke
- UGC-DAE Consortium for Scientific Research, University Campus, Khandawa Road, Indore, MP 452001, India
| | - Kiran Singh
- UGC-DAE Consortium for Scientific Research, University Campus, Khandawa Road, Indore, MP 452001, India
| | - N P Lalla
- UGC-DAE Consortium for Scientific Research, University Campus, Khandawa Road, Indore, MP 452001, India
| | - P Chaddah
- UGC-DAE Consortium for Scientific Research, University Campus, Khandawa Road, Indore, MP 452001, India
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Casola F, Shiroka T, Feiguin A, Wang S, Grbić MS, Horvatić M, Krämer S, Mukhopadhyay S, Conder K, Berthier C, Ott HR, Rønnow HM, Rüegg C, Mesot J. Field-induced quantum soliton lattice in a frustrated two-leg spin-1/2 ladder. PHYSICAL REVIEW LETTERS 2013; 110:187201. [PMID: 23683239 DOI: 10.1103/physrevlett.110.187201] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Indexed: 06/02/2023]
Abstract
Based on high-field (31)P nuclear magnetic resonance experiments and accompanying numerical calculations, it is argued that in the frustrated S=1/2 ladder compound BiCu(2)PO(6) a field-induced soliton lattice develops above a critical field of μ(0)H(c1)=20.96(7) T. Solitons result from the fractionalization of the S=1, bosonlike triplet excitations, which in other quantum antiferromagnets are commonly known to experience Bose-Einstein condensation or to crystallize in a superstructure. Unlike in spin-Peierls systems, these field-induced quantum domain walls do not arise from a state with broken translational symmetry and are triggered exclusively by magnetic frustration. Our model predicts yet another second-order phase transition at H(c2)>H(c1), driven by soliton-soliton interactions, most likely corresponding to the one observed in recent magnetocaloric and other bulk measurements.
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Affiliation(s)
- F Casola
- Laboratorium für Festkörperphysik, ETH Hönggerberg, CH-8093 Zürich, Switzerland.
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Ronnow HM, Enderle M, McMorrow DF, Regnault L, Dhalenne G, Revcolevschi A, Hoser A, Prokes K, Vorderwisch P, Schneider H. Neutron scattering study of the field-induced soliton lattice in CuGeO3. PHYSICAL REVIEW LETTERS 2000; 84:4469-4472. [PMID: 10990713 DOI: 10.1103/physrevlett.84.4469] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/1999] [Indexed: 05/23/2023]
Abstract
CuGeO3 undergoes a transition from a spin-Peierls phase to an incommensurate phase at a critical field of H(c) approximately 12.5 T. In the high-field phase a lattice of solitons forms, with both structural and magnetic components, and these have been studied using neutron scattering techniques. Our results provide direct evidence for a long-ranged magnetic soliton structure which has both staggered and uniform magnetizations with amplitudes that are broadly in accord with theoretical estimates. The magnetic soliton width gamma(m) and the field dependence of the incommensurability deltak(SP) are found to agree well with theoretical predictions.
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Affiliation(s)
- HM Ronnow
- Condensed Matter Physics and Chemistry Department, Riso National Laboratory, DK-4000 Roskilde, Denmark
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