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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Nat+Commun
2016 ; 7
(ä): 12519
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English Wikipedia
Volume-wise destruction of the antiferromagnetic Mott insulating state through
quantum tuning
#MMPMID27531192
Frandsen BA
; Liu L
; Cheung SC
; Guguchia Z
; Khasanov R
; Morenzoni E
; Munsie TJ
; Hallas AM
; Wilson MN
; Cai Y
; Luke GM
; Chen B
; Li W
; Jin C
; Ding C
; Guo S
; Ning F
; Ito TU
; Higemoto W
; Billinge SJ
; Sakamoto S
; Fujimori A
; Murakami T
; Kageyama H
; Alonso JA
; Kotliar G
; Imada M
; Uemura YJ
Nat Commun
2016[Aug]; 7
(ä): 12519
PMID27531192
show ga
RENiO3 (RE=rare-earth element) and V2O3 are archetypal Mott insulator systems.
When tuned by chemical substitution (RENiO3) or pressure (V2O3), they exhibit a
quantum phase transition (QPT) between an antiferromagnetic Mott insulating state
and a paramagnetic metallic state. Because novel physics often appears near a
Mott QPT, the details of this transition, such as whether it is first or second
order, are important. Here, we demonstrate through muon spin relaxation/rotation
(?SR) experiments that the QPT in RENiO3 and V2O3 is first order: the
magnetically ordered volume fraction decreases to zero at the QPT, resulting in a
broad region of intrinsic phase separation, while the ordered magnetic moment
retains its full value until it is suddenly destroyed at the QPT. These findings
bring to light a surprising universality of the pressure-driven Mott transition,
revealing the importance of phase separation and calling for further
investigation into the nature of quantum fluctuations underlying the transition.