Microscopic phase separation in triangular-lattice quantum spin magnetκ-(BEDT-TTF) 2Cu 2(CN) 3 probed by muon spin relaxation

Saor Nakajima, Takao Suzuki, Yasuyuki Ishii, Kazuk Ohishi, Isa Watanabe, Takayuk Goto, Akir Oosawa, Naok Yoneyama, Nori Kobayashi, Francis L. Pratt, Takahik Sasaki

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

The ground state of the quantum spin system κ-(BEDT-TTF) 2Cu 2(CN) 3, in which antiferromagnetically interacting S = 1=2 spins are located on a nearly equilateral triangular lattice, attracts considerable interest from both experimental and theoretical aspects, because a simple antiferromagnetic order may be inhibited owing to geometrical frustration, and hence, an exotic ground state is expected. Furthermore, two recent reports on the ground state of this system have increased the intrigue by showing completely controversial results: one indicates the gapless state and the other the gapped state. By utilizing the SR microscopic probe, we have investigated its spin dynamics below 0.1 K, unveiling its microscopically phase-separated ground state at zero field.

Original languageEnglish
Article number063706
JournalJournal of the Physical Society of Japan
Volume81
Issue number6
DOIs
Publication statusPublished - 2012 Jun

Fingerprint

muons
magnets
ground state
frustration
spin dynamics
probes

Keywords

  • μSR
  • Frustration
  • Organic superconductors
  • Quantum spin antiferromagnet
  • Triangular lattice

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Microscopic phase separation in triangular-lattice quantum spin magnetκ-(BEDT-TTF) 2Cu 2(CN) 3 probed by muon spin relaxation. / Nakajima, Saor; Suzuki, Takao; Ishii, Yasuyuki; Ohishi, Kazuk; Watanabe, Isa; Goto, Takayuk; Oosawa, Akir; Yoneyama, Naok; Kobayashi, Nori; Pratt, Francis L.; Sasaki, Takahik.

In: Journal of the Physical Society of Japan, Vol. 81, No. 6, 063706, 06.2012.

Research output: Contribution to journalArticle

Nakajima, Saor ; Suzuki, Takao ; Ishii, Yasuyuki ; Ohishi, Kazuk ; Watanabe, Isa ; Goto, Takayuk ; Oosawa, Akir ; Yoneyama, Naok ; Kobayashi, Nori ; Pratt, Francis L. ; Sasaki, Takahik. / Microscopic phase separation in triangular-lattice quantum spin magnetκ-(BEDT-TTF) 2Cu 2(CN) 3 probed by muon spin relaxation. In: Journal of the Physical Society of Japan. 2012 ; Vol. 81, No. 6.
@article{3733b84721b6469992419a93baa76713,
title = "Microscopic phase separation in triangular-lattice quantum spin magnetκ-(BEDT-TTF) 2Cu 2(CN) 3 probed by muon spin relaxation",
abstract = "The ground state of the quantum spin system κ-(BEDT-TTF) 2Cu 2(CN) 3, in which antiferromagnetically interacting S = 1=2 spins are located on a nearly equilateral triangular lattice, attracts considerable interest from both experimental and theoretical aspects, because a simple antiferromagnetic order may be inhibited owing to geometrical frustration, and hence, an exotic ground state is expected. Furthermore, two recent reports on the ground state of this system have increased the intrigue by showing completely controversial results: one indicates the gapless state and the other the gapped state. By utilizing the SR microscopic probe, we have investigated its spin dynamics below 0.1 K, unveiling its microscopically phase-separated ground state at zero field.",
keywords = "μSR, Frustration, Organic superconductors, Quantum spin antiferromagnet, Triangular lattice",
author = "Saor Nakajima and Takao Suzuki and Yasuyuki Ishii and Kazuk Ohishi and Isa Watanabe and Takayuk Goto and Akir Oosawa and Naok Yoneyama and Nori Kobayashi and Pratt, {Francis L.} and Takahik Sasaki",
year = "2012",
month = "6",
doi = "10.1143/JPSJ.81.063706",
language = "English",
volume = "81",
journal = "Journal of the Physical Society of Japan",
issn = "0031-9015",
publisher = "Physical Society of Japan",
number = "6",

}

TY - JOUR

T1 - Microscopic phase separation in triangular-lattice quantum spin magnetκ-(BEDT-TTF) 2Cu 2(CN) 3 probed by muon spin relaxation

AU - Nakajima, Saor

AU - Suzuki, Takao

AU - Ishii, Yasuyuki

AU - Ohishi, Kazuk

AU - Watanabe, Isa

AU - Goto, Takayuk

AU - Oosawa, Akir

AU - Yoneyama, Naok

AU - Kobayashi, Nori

AU - Pratt, Francis L.

AU - Sasaki, Takahik

PY - 2012/6

Y1 - 2012/6

N2 - The ground state of the quantum spin system κ-(BEDT-TTF) 2Cu 2(CN) 3, in which antiferromagnetically interacting S = 1=2 spins are located on a nearly equilateral triangular lattice, attracts considerable interest from both experimental and theoretical aspects, because a simple antiferromagnetic order may be inhibited owing to geometrical frustration, and hence, an exotic ground state is expected. Furthermore, two recent reports on the ground state of this system have increased the intrigue by showing completely controversial results: one indicates the gapless state and the other the gapped state. By utilizing the SR microscopic probe, we have investigated its spin dynamics below 0.1 K, unveiling its microscopically phase-separated ground state at zero field.

AB - The ground state of the quantum spin system κ-(BEDT-TTF) 2Cu 2(CN) 3, in which antiferromagnetically interacting S = 1=2 spins are located on a nearly equilateral triangular lattice, attracts considerable interest from both experimental and theoretical aspects, because a simple antiferromagnetic order may be inhibited owing to geometrical frustration, and hence, an exotic ground state is expected. Furthermore, two recent reports on the ground state of this system have increased the intrigue by showing completely controversial results: one indicates the gapless state and the other the gapped state. By utilizing the SR microscopic probe, we have investigated its spin dynamics below 0.1 K, unveiling its microscopically phase-separated ground state at zero field.

KW - μSR

KW - Frustration

KW - Organic superconductors

KW - Quantum spin antiferromagnet

KW - Triangular lattice

UR - http://www.scopus.com/inward/record.url?scp=84861941918&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84861941918&partnerID=8YFLogxK

U2 - 10.1143/JPSJ.81.063706

DO - 10.1143/JPSJ.81.063706

M3 - Article

VL - 81

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

SN - 0031-9015

IS - 6

M1 - 063706

ER -