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Charge and Orbital-Ordering-Induced Charge-Polarized State in Bilayer Manganite
Yunsang Lee,T Arima,T Tokunaga,T Lottermoser,Y Tokura,Y. K Seo 한국물리학회 2007 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.51 No.5
We have investigated a new type of electronic charge-polarized state in bilayer manganite, Pr(Sr$_{0.1}$Ca$_{0.9}$)$_{2}$Mn$_{2}$O$_{7}$ (PSCMO). The PSCMO compound has two charge-orbital ordering (CO-OO) states with respect to the direction of the orbital stripe, which is clearly identified by addressing the optical anisotropy. Notably, a charge-polarized state is formed in the lower-temperature CO-OO state where the $c$-axis stacking patterns of the lattice and the charge modulations along the $b$-axis match with each other. We detail the correlation among the transport, the optical and the structural properties in the charge and orbital-ordering-induced charge-polarized states in bilayer manganite.
Anisotropy in the Lattice Dynamics in the Charge-Orbital Ordered Phase: a Raman Spectroscopic Study
이윤상,J.P. He,Y. Kaneko,T. Arima,Y. Tokura 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.54 No.6
We investigated the polarization-dependent Raman-active phonon spectra in a single domain of half-doped Eu1/2Ca3/2MnO4 with charge-orbital ordering. While the Raman spectra in both polarizations commonly exhibit the robust development of two phonon modes, Jahn-Teller and breathing modes, below the charge-orbital ordering temperature, the intensities of the modes are found to be polarization dependent. These behaviors are discussed in relation to the CE-type ordering and the resultant electronic anisotropy.
Rino Hasegawa,Kenshi Yao,Takao Kanemitsu,Hisatomi Arima,Takayuki Hirase,Yuuya Hiratsuka,Kazuhiro Takeda,Kentaro Imamura,Kensei Ohtsu,Yoichiro Ono,Masaki Miyaoka,Takashi Hisabe,Toshiharu Ueki,Hiroshi T 대한소화기내시경학회 2024 Clinical Endoscopy Vol.57 No.1
Background/Aims: Multiple white and flat elevated lesions (MWFL) that develop from the gastric corpus to the fornix may be strongly associated with oral antacid intake. Therefore, this study aimed to determine the association between the occurrence of MWFL and oral proton pump inhibitor (PPI) intake and clarify the endoscopic and clinicopathological characteristics of MWFL. Methods: The study included 163 patients. The history of oral drug intake was collected, and serum gastrin levels and anti-Helicobacter pylori immunoglobulin G antibody titers were measured. Upper gastrointestinal endoscopy was performed. The primary study endpoint was the association between MWFL and oral PPI intake. Results: In the univariate analyses, MWFL were observed in 35 (49.3%) of 71 patients who received oral PPIs and 10 (10.9%) of 92 patients who did not receive oral PPIs. The occurrence of MWFL was significantly higher among patients who received PPIs than in those who did not (p<0.001). Moreover, the occurrence of MWFL was significantly higher in patients with hypergastrinemia (p=0.005). In the multivariate analyses, oral PPI intake was the only significant independent factor associated with the presence of MWFL (p=0.001; odds ratio, 5.78; 95% confidence interval, 2.06–16.2). Conclusions: Our findings suggest that oral PPI intake is associated with the presence of MWFL (UMINCTR 000030144).