Microscopic Properties of the Pinwheel Kagome Compound Rb2Cu3SnF12

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• Autor: Mihael Srđan Grbić
• Autor: Steffen Kramer
• Autor: Claude Berthier
• Autor: Fabien Trousselet
• Autor: Olivier Cepas
• Autor: Hidekazu Tanaka
• Autor: Mladen Horvatić; MBZ: 112333
• Autorova ustanova: Sveučilište u Zagrebu; Prirodoslovno-matematički fakultet; (Fizički odsjek)
• Znanstveno / umjetničko područje, polje i grana: PRIRODNE ZNANOSTI; Fizika

Sažetak (engleski)

Using 63,65Cu nuclear magnetic resonance in magnetic fields up to 30 T, we study the microscopic properties of the 12-site valence-bond-solid ground state in the “pinwheel” kagome compound Rb2Cu3SnF12. We find that the ground state is characterized by a strong transverse staggered spin polarization whose temperature and field dependence points to a mixing of the singlet and triplet states. This is further corroborated by the field dependence of the gap Δ(H), which has a level anticrossing with a large minimum gap value of ≈Δ(0)/2, with no evidence of a phase transition down to 1.5 K. By the exact diagonalization of small clusters, we show that the observed anticrossing is mainly due to staggered tilts of the g tensors defined by the crystal structure and reveal symmetry properties of the low-energy excitation spectrum compatible with the absence of level crossing.

• Ključne riječi (engleski): frustration; magnetism; singlet; valence bond
• Jezik: engleski
• Vrsta publikacije: Znanstveni rad - Izvorni znanstveni rad
• Status objave: Objavljen
• Vrsta recenzije: Recenziran - međunarodna recenzija
• Verzija publikacije: Objavljena verzija rada (izdavačev PDF)
• Naslov časopisa: Physical Review Letters
• Brojčani podaci: vol. 110, br. 24, 247203
• p-ISSN: 0031-9007
• e-ISSN: 1079-7114
• DOI: https://doi.org/10.1103/PhysRevLett.110.247203
• URN:NBN: urn:nbn:hr:217:679116
• Datum objave publikacije: 2013
• Projekt: Šifra: 119-1191458-1022; Naziv (hrvatski): Mikrovalna istraživanja novih materijala; Voditelj: Miroslav Požek; Pravna nadležnost: Hrvatska; Financijer: MZOS; Linija financiranja: ZP
• URL dokumenta: https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.110.247203
• Vrsta resursa: Tekst
• Prava pristupa: Otvoreni pristup
• Javna napomena: Copyright (2013) by the American Physical Society. Received 5 November 2012; revised manuscript received 31 March 2013; published 12 June 2013.
• Datum i vrijeme pohrane: 2019-11-26 13:45:18