Quantum dynamics of hard-core bosons in tilted bichromatic optical lattices
文献类型：期刊论文
| 作者 | Cai, XM ; Chen, S ; Wang, YP |
| 刊名 | PHYSICAL REVIEW A
 |
| 出版日期 | 2011 |
| 卷号 | 84期号:3 |
| 关键词 | BLOCH-ZENER OSCILLATIONS TONKS-GIRARDEAU GAS ATOMS ARRAYS |
| ISSN号 | 1050-2947 |
| 通讯作者 | Cai, XM (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China. |
| 中文摘要 | Polycrystalline samples of the perovskite family Sr1-xCaxCrO3 have been prepared at high pressure and temperature in steps of 1/6 over the range 0 <= x <= 1. Rietveld analysis shows a series of structural phase transitions from cubic to tetragonal to orthorhombic with increasing x. The cubic samples have no long-range magnetic order; the other samples become antiferromagnetically ordered below a T-N that increases with x. At ambient pressure, the electric transport properties of the cubic and tetragonal phases are semiconducting with a small (meV range) activation energy that increases with x; the orthorhombic phase exhibits variable-range hopping rather than the small-polaron behavior typically found for mixed-valent, localized-electron configurations. Above a pressure P = P-C, a smooth insulator-metal transition is found at a T-IM that decreases with increasing P for a fixed x; P-C increases with x. These phenomena are rationalized qualitatively with a pi*-band model having a width W-pi that approaches crossover from itinerant-electron to localized-electron behavior as W-pi decreases with increasing x. The smaller size of the Ca2+ ion induces the structural changes and the greater acidity of the Ca2+ ion is primarily responsible for narrowing W-pi as x increases. |
| 收录类别 | SCI |
| 资助信息 | NSF of China [10821403, 10974234]; Chinese Academy of Science; MOST |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/51668]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Cai, XM,Chen, S,Wang, YP. Quantum dynamics of hard-core bosons in tilted bichromatic optical lattices[J]. PHYSICAL REVIEW A,2011,84(3). |
| APA | Cai, XM,Chen, S,&Wang, YP.(2011).Quantum dynamics of hard-core bosons in tilted bichromatic optical lattices.PHYSICAL REVIEW A,84(3). |
| MLA | Cai, XM,et al."Quantum dynamics of hard-core bosons in tilted bichromatic optical lattices".PHYSICAL REVIEW A 84.3(2011). |
入库方式： OAI收割
来源：物理研究所
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