相关实验视频
Updated: Jul 16, 2025

09:04
Recording Gap Junction Current from Xenopus Oocytes
Published on: January 21, 2022
2.3K
在BaPbBi1‒O3中的伪差距是0.7,0.75和1.0)
M Bharath1, Jaskirat Brar1, Himanshu Pant1
1School of Physical Sciences, Indian Institute of Technology Mandi, Kamand, Himachal Pradesh 175005, India.
Journal of physics. Condensed matter : an Institute of Physics journal
|September 15, 2023
概括
这项研究揭示了颗粒大小和应变是巴里 Lead Bismuthate (BaPb$_{1-x}$Bi$_x$O$_3$) 超导性的关键. 氧气空缺和化学潜力转移影响金属性,并建议修订相位图.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
背景情况:
- Lead Bismuthate (BaPb$_{1-x}$Bi$_x$O$_3$,BPBO) 是一种具有复杂电子特性的材料.
- 了解晶体结构,电子状态和超导性之间的相互作用对于材料设计至关重要.
研究的目的:
- 为了研究BPBO对不同成分 (x = 0.7,0.75,1.0) 的正方形相的晶体和电子结构.
- 阐明控制超导,金属性和BPBO化合物中伪间隙存在的因素.
- 为BPBO提出一个修订的温度兴奋剂相位图.
主要方法:
- 取决于温度的X射线衍射 (XRD) 测量.
- 光发射光谱学 (PES),包括核心水平的研究.
- 第一个原则电子结构计算.
主要成果:
- 粒子大小和应变显著影响BPBO中的超导性.
- 在BPBO$_{75}$和BPO中,金属的行为与氧气空缺和化学电位向价值带的转移 (孔 doping) 有关.
- 在BPBO$_{70}$和BPO中的伪差距可能来自于超出简单障碍的贡献.
结论:
- 该研究强调了结构参数和缺陷在确定BPBO电子特性方面的关键作用.
- 结果表明需要将伪间隙阶段纳入BPBO的温度兴奋剂阶段图.
- 建议对粒子大小,载体性质,粒度边界以及伪间隙的微观起源进行进一步的研究.
相关概念视频
Interpreting ¹H NMR Signal Splitting: The (n + 1) Rule
1.4K
In the AX proton spin system, proton A can sense the two spin states of a coupled proton X, resulting in a doublet NMR signal with two peaks of equal (1:1) intensity. When proton A is coupled to two equivalent protons (AX2 spin system), the spin states of each X can be aligned with or against the external field, creating three possible scenarios. This results in a 1:2:1 triplet signal, where the central peak corresponds to the chemical shift of A and is twice as large or intense as the...
1.4K
¹H NMR: Complex Splitting
1.3K
A proton M that is coupled to a proton X results in doublet signals for M. However, NMR-active nuclei can be simultaneously coupled to more than one nonequivalent nucleus. When M is coupled to a second proton A, such as in styrene oxide, each peak in the doublet is split into another doublet.
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied...
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied...
1.3K
¹H NMR Signal Multiplicity: Splitting Patterns
5.2K
When protons A and X are coupled, their nuclear spin energy levels are slightly modified. This is because the energy required to excite proton A to a spin state parallel to proton X is slightly different from the energy required for it to become anti-parallel to spin X. Consequently, there are two possible excitation frequencies for A (A1 and A2), depending on the spin state of X, and vice versa. The mutual nature of coupling implies that the difference between frequencies A1 and A2, indicated...
5.2K
Rab Cascades
2.7K
Rab GTPases act in a regulated cascade during membrane fusion, helping the lipid bilayers mix. The Rab family of proteins are active when bound to GTP, and inactive when bound to GDP. Hence, they act as guanine nucleotide-dependent molecular switches. Rab-GTP recognizes and binds to long or short-range tethering proteins to capture the target vesicle. These tethers coordinate with SNAREs on the vesicle and the target membrane to assemble the trans SNARE complex that locks the mixing bilayers.
2.7K
Biasing of P-N Junction
590
The operation of a p-n junction diode involves various biasing conditions, including forward bias, reverse bias, and equilibrium.
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...
590
Biot-Savart Law
6.3K
The Biot-Savart law gives the magnitude and direction of the magnetic field produced by a current. This empirical law was named in honor of two scientists, Jean-Baptiste Biot and Félix Savart, who investigated the interaction between a straight, current-carrying wire and a permanent magnet.
A current-carrying wire creates a magnetic field in its vicinity. Consider an infinitesimal current element dl in a wire. The direction of vector dl is along the direction of the current. The total magnetic...
A current-carrying wire creates a magnetic field in its vicinity. Consider an infinitesimal current element dl in a wire. The direction of vector dl is along the direction of the current. The total magnetic...
6.3K

