Coexistence of gap-less and gapped excitations in NH4CuCl 3

Hiroyuki Nojiri; Hidekazu Tanaka; Buddy Kurniawan; Mitsuhiro Motokawa

doi:10.1016/S0921-4526(02)02012-4

Coexistence of gap-less and gapped excitations in NH₄CuCl ₃

Hiroyuki Nojiri, Hidekazu Tanaka, Buddy Kurniawan, Mitsuhiro Motokawa

Department of Physics

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

2 Citations (Scopus)

Abstract

A low-temperature ESR investigation is performed on a low-dimensional compound NH₄CuCl₃ with magnetization plateaux. In the phase below the 1/4-plateau, a coexistence of gapped two triplets and a gap-less mode is found. Below 1.3 K at which a part of spins show some magnetic ordering, the higher energy triplet mode exhibit no change. In addition to the previously reported gapped modes at 1/4- and 3/4- plateaux, a new low energy mode is found at the half of the saturation field. This mode may be caused by an 'irrelevant instability' of 1/2-plateau.

Original language	English
Pages (from-to)	701-702
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	329-333
Issue number	II
DOIs	https://doi.org/10.1016/S0921-4526(02)02012-4
Publication status	Published - May 2003

Keywords

Electron spin resonance
High magnetic field
Magnetization plateau
Spin gap

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10.1016/S0921-4526(02)02012-4

Cite this

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title = "Coexistence of gap-less and gapped excitations in NH4CuCl 3",

abstract = "A low-temperature ESR investigation is performed on a low-dimensional compound NH4CuCl3 with magnetization plateaux. In the phase below the 1/4-plateau, a coexistence of gapped two triplets and a gap-less mode is found. Below 1.3 K at which a part of spins show some magnetic ordering, the higher energy triplet mode exhibit no change. In addition to the previously reported gapped modes at 1/4- and 3/4- plateaux, a new low energy mode is found at the half of the saturation field. This mode may be caused by an 'irrelevant instability' of 1/2-plateau.",

keywords = "Electron spin resonance, High magnetic field, Magnetization plateau, Spin gap",

author = "Hiroyuki Nojiri and Hidekazu Tanaka and Buddy Kurniawan and Mitsuhiro Motokawa",

note = "Funding Information: This work was partly supported by Grant-in-Aid on Priority Area {\textquoteleft}Field-Induced New Quantum Phenomena in Magnetic Systems{\textquoteright} from the Ministry of Education, Science, Sports and Culture of Japan.",

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doi = "10.1016/S0921-4526(02)02012-4",

language = "English",

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TY - JOUR

T1 - Coexistence of gap-less and gapped excitations in NH4CuCl 3

AU - Nojiri, Hiroyuki

AU - Tanaka, Hidekazu

AU - Kurniawan, Buddy

AU - Motokawa, Mitsuhiro

N1 - Funding Information: This work was partly supported by Grant-in-Aid on Priority Area ‘Field-Induced New Quantum Phenomena in Magnetic Systems’ from the Ministry of Education, Science, Sports and Culture of Japan.

PY - 2003/5

Y1 - 2003/5

N2 - A low-temperature ESR investigation is performed on a low-dimensional compound NH4CuCl3 with magnetization plateaux. In the phase below the 1/4-plateau, a coexistence of gapped two triplets and a gap-less mode is found. Below 1.3 K at which a part of spins show some magnetic ordering, the higher energy triplet mode exhibit no change. In addition to the previously reported gapped modes at 1/4- and 3/4- plateaux, a new low energy mode is found at the half of the saturation field. This mode may be caused by an 'irrelevant instability' of 1/2-plateau.

AB - A low-temperature ESR investigation is performed on a low-dimensional compound NH4CuCl3 with magnetization plateaux. In the phase below the 1/4-plateau, a coexistence of gapped two triplets and a gap-less mode is found. Below 1.3 K at which a part of spins show some magnetic ordering, the higher energy triplet mode exhibit no change. In addition to the previously reported gapped modes at 1/4- and 3/4- plateaux, a new low energy mode is found at the half of the saturation field. This mode may be caused by an 'irrelevant instability' of 1/2-plateau.

KW - Electron spin resonance

KW - High magnetic field

KW - Magnetization plateau

KW - Spin gap

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U2 - 10.1016/S0921-4526(02)02012-4

DO - 10.1016/S0921-4526(02)02012-4

M3 - Article

AN - SCOPUS:23044488081

SN - 0921-4526

VL - 329-333

SP - 701

EP - 702

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

IS - II

ER -

Coexistence of gap-less and gapped excitations in NH₄CuCl ₃

Abstract

Keywords

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