Direct Observation of the Spin Gap in NaV2O5 by Submillimeter Wave ESR

Sebastian Luther; Hiroyuki Nojiri; Mitsuhiro Motokawa; Masahiko Isobe; Yutaka Ueda; Sebastian Luther; Hiroyuki Nojiri

doi:10.1143/JPSJ.67.3715

Direct Observation of the Spin Gap in NaV₂O₅ by Submillimeter Wave ESR

Sebastian Luther, Hiroyuki Nojiri, Mitsuhiro Motokawa, Masahiko Isobe, Yutaka Ueda, Sebastian Luther, Hiroyuki Nojiri

IMR - Institute for Materials Research (institute affiliation only)

Research output: Contribution to journal › Article › peer-review

33 Citations (Scopus)

Abstract

Transitions between the singlet ground state and the first excited triplet state in NaV₂O₅ have been observed by means of submillimeter wave ESR for the first time. The distinct Zeeman splitting clearly indicates that the first excited state is a triplet state. The singlet-triplet energy gap at zero field has been determined as Δ = 8.13 meV at T = 4.2 K A considerable anisotropy of the absorption intensity with respect to the magnetic field orientation has been observed. The intensity is strongest for B//a and weakest for B//c. We propose that this result can be explained by including in the Hamiltonian the Dzyaloshinsky-Moriya interaction which breaks the selection rule.

Original language	English
Pages (from-to)	3715-3717
Number of pages	3
Journal	Journal of the Physical Society of Japan
Volume	67
Issue number	11
DOIs	https://doi.org/10.1143/JPSJ.67.3715
Publication status	Published - 1998

Keywords

ESR
high magnetic fields
NaVO
spin gap
spin-Peierls system

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10.1143/JPSJ.67.3715

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abstract = "Transitions between the singlet ground state and the first excited triplet state in NaV2O5 have been observed by means of submillimeter wave ESR for the first time. The distinct Zeeman splitting clearly indicates that the first excited state is a triplet state. The singlet-triplet energy gap at zero field has been determined as Δ = 8.13 meV at T = 4.2 K A considerable anisotropy of the absorption intensity with respect to the magnetic field orientation has been observed. The intensity is strongest for B//a and weakest for B//c. We propose that this result can be explained by including in the Hamiltonian the Dzyaloshinsky-Moriya interaction which breaks the selection rule.",

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TY - JOUR

T1 - Direct Observation of the Spin Gap in NaV2O5 by Submillimeter Wave ESR

AU - Luther, Sebastian

AU - Nojiri, Hiroyuki

AU - Motokawa, Mitsuhiro

AU - Isobe, Masahiko

AU - Ueda, Yutaka

AU - Luther, Sebastian

AU - Nojiri, Hiroyuki

PY - 1998

Y1 - 1998

N2 - Transitions between the singlet ground state and the first excited triplet state in NaV2O5 have been observed by means of submillimeter wave ESR for the first time. The distinct Zeeman splitting clearly indicates that the first excited state is a triplet state. The singlet-triplet energy gap at zero field has been determined as Δ = 8.13 meV at T = 4.2 K A considerable anisotropy of the absorption intensity with respect to the magnetic field orientation has been observed. The intensity is strongest for B//a and weakest for B//c. We propose that this result can be explained by including in the Hamiltonian the Dzyaloshinsky-Moriya interaction which breaks the selection rule.

AB - Transitions between the singlet ground state and the first excited triplet state in NaV2O5 have been observed by means of submillimeter wave ESR for the first time. The distinct Zeeman splitting clearly indicates that the first excited state is a triplet state. The singlet-triplet energy gap at zero field has been determined as Δ = 8.13 meV at T = 4.2 K A considerable anisotropy of the absorption intensity with respect to the magnetic field orientation has been observed. The intensity is strongest for B//a and weakest for B//c. We propose that this result can be explained by including in the Hamiltonian the Dzyaloshinsky-Moriya interaction which breaks the selection rule.

KW - ESR

KW - high magnetic fields

KW - NaVO

KW - spin gap

KW - spin-Peierls system

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Direct Observation of the Spin Gap in NaV₂O₅ by Submillimeter Wave ESR

Abstract

Keywords

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