Abstract
Over the past 20 years, fullerides have been studied as the source of high-transition-temperature (Tc) superconductivity except for copper oxides. The recent finding of the Mott insulating state right beside superconductivity in Cs3C60 has suggested that magnetism helps raise Tc even in fullerides as in heavy-fermion compounds, high-Tc copper oxides, two-dimensional organic conductors, and iron pnictides. Namely, one tends to think that the link between Mott insulator and superconductivity takes place in fullerides, which can give rise to the mechanism beyond the Bardeen-Cooper-Schrieffer framework. However, the relationship between the Mott state and the superconductivity in Cs 3C60 is still under debate. By nuclear magnetic resonance measurements under pressure, we find that the magnetism and superconductivity in Cs3C60 are competing orders. Different from previous reports, the phase separation of Cs3C60 crystals into the Mott and metallic states allows us to systematically study the evolution of the ground state under pressure. Our careful experiments have found that the prevention of a magnetic order is rather essential for the superconductivity in face-centred cubic Cs3C60, which presents a basic strategy for finding still higher Tc in this system.
| Original language | English |
|---|---|
| Article number | 014709 |
| Journal | Journal of the Physical Society of Japan |
| Volume | 82 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Jan 2013 |
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Keywords
- CsC
- Fulleride
- Mott state
- NMR
- Pressure
- Superconductivity
ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
The Mott state and superconductivity in face-centred cubic structured Cs3C60 : A 133Cs-nuclear magnetic resonance study under pressure. / Kawasaki, Shinji; Fukui, Junji; Motoyama, Takeshi; Suzuki, Yuta; Shibasaki, Seiji; Zheng, Guo-Qing.
In: Journal of the Physical Society of Japan, Vol. 82, No. 1, 014709, 01.2013.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The Mott state and superconductivity in face-centred cubic structured Cs3C60
T2 - A 133Cs-nuclear magnetic resonance study under pressure
AU - Kawasaki, Shinji
AU - Fukui, Junji
AU - Motoyama, Takeshi
AU - Suzuki, Yuta
AU - Shibasaki, Seiji
AU - Zheng, Guo-Qing
PY - 2013/1
Y1 - 2013/1
N2 - Over the past 20 years, fullerides have been studied as the source of high-transition-temperature (Tc) superconductivity except for copper oxides. The recent finding of the Mott insulating state right beside superconductivity in Cs3C60 has suggested that magnetism helps raise Tc even in fullerides as in heavy-fermion compounds, high-Tc copper oxides, two-dimensional organic conductors, and iron pnictides. Namely, one tends to think that the link between Mott insulator and superconductivity takes place in fullerides, which can give rise to the mechanism beyond the Bardeen-Cooper-Schrieffer framework. However, the relationship between the Mott state and the superconductivity in Cs 3C60 is still under debate. By nuclear magnetic resonance measurements under pressure, we find that the magnetism and superconductivity in Cs3C60 are competing orders. Different from previous reports, the phase separation of Cs3C60 crystals into the Mott and metallic states allows us to systematically study the evolution of the ground state under pressure. Our careful experiments have found that the prevention of a magnetic order is rather essential for the superconductivity in face-centred cubic Cs3C60, which presents a basic strategy for finding still higher Tc in this system.
AB - Over the past 20 years, fullerides have been studied as the source of high-transition-temperature (Tc) superconductivity except for copper oxides. The recent finding of the Mott insulating state right beside superconductivity in Cs3C60 has suggested that magnetism helps raise Tc even in fullerides as in heavy-fermion compounds, high-Tc copper oxides, two-dimensional organic conductors, and iron pnictides. Namely, one tends to think that the link between Mott insulator and superconductivity takes place in fullerides, which can give rise to the mechanism beyond the Bardeen-Cooper-Schrieffer framework. However, the relationship between the Mott state and the superconductivity in Cs 3C60 is still under debate. By nuclear magnetic resonance measurements under pressure, we find that the magnetism and superconductivity in Cs3C60 are competing orders. Different from previous reports, the phase separation of Cs3C60 crystals into the Mott and metallic states allows us to systematically study the evolution of the ground state under pressure. Our careful experiments have found that the prevention of a magnetic order is rather essential for the superconductivity in face-centred cubic Cs3C60, which presents a basic strategy for finding still higher Tc in this system.
KW - CsC
KW - Fulleride
KW - Mott state
KW - NMR
KW - Pressure
KW - Superconductivity
UR - http://www.scopus.com/inward/record.url?scp=84871808111&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84871808111&partnerID=8YFLogxK
U2 - 10.7566/JPSJ.82.014709
DO - 10.7566/JPSJ.82.014709
M3 - Article
AN - SCOPUS:84871808111
VL - 82
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 1
M1 - 014709
ER -