Results 41 to 50 of about 477,147 (274)

A systematic study of the negative thermal expansion in zinc-blende and diamond-like semiconductors

New Journal of Physics, 2019
Upon heating, almost all zinc-blende (ZB) and diamond-like semiconductors undergo volume contraction at low temperature, i.e. negative thermal expansion (NTE), instead of commonly expected expansion.
Kaike Yang, Jin Xiao, Jun-Wei Luo, Shu-Shen Li, Su-Huai Wei, Hui-Xiong Deng   +5 more
doaj   +1 more source

Novel Quantum Criticality in CeRu$_2$Si$_2$ near Absolute Zero Observed by Thermal Expansion and Magnetostriction [PDF]

, 2008
We report linear thermal expansion and magnetostriction measurements for CeRu$_2$Si$_2$ in magnetic fields up to 52.6 mT and at temperatures down to 1 mK.
Abe, S., Komai, Y., Matsumoto, K., Segawa, Y., Suzuki, H., Takahashi, D., Tsujii, H., Yoshida, J., Ōnuki, Y.   +8 more
core   +3 more sources

Holographic Thermal Helicity [PDF]

, 2014
We study the thermal helicity, defined in arXiv:1211.3850, of a conformal field theory with anomalies in the context of AdS$_{2n+1}$/CFT$_{2n}$. To do so, we consider large charged rotating AdS black holes in the Einstein-Maxwell-Chern-Simons theory with
Azeyanagi, Tatsuo, Loganayagam, R., Ng, Gim Seng, Rodriguez, Maria J.   +3 more
core   +2 more sources

Defect-dependent colossal negative thermal expansion in UiO-66(Hf) metal-organic framework [PDF]

, 2015
Thermally-densified hafnium terephthalate UiO-66(Hf) is shown to exhibit the strongest isotropic negative thermal expansion (NTE) effect yet reported for a metal-organic framework (MOF).
Cliffe, Matthew J., Coudert, Francois-Xavier, Goodwin, Andrew L., Hill, Joshua A., Murray, Claire A.   +4 more
core   +4 more sources

Thermal contraction in silicon nanowires at low temperatures

, 2010
The thermal expansion effect of silicon nanowires (SiNW) in [100], [110] and [111] directions with different sizes is theoretically investigated. At low temperatures, all SiNW studied exhibit thermal contraction effect due to the lowest energy of the ...
Baowen Li, Chung, Cui, Cui, Cui, Duan, Gale, Gudiksen, Holmes, Huang, Huang, Huang, Jian-Sheng Wang, Jiang, Jiang, Jiang, Jin-Wu Jiang, Krishnan, Ma, Mahan, Markussen, Meyer, Morales, OuYang, Pan, Peelaers, Popov, Schelling, T.Vo, Tersoff, Thonhauser, Tian, Timko, Treacy, Wong, Wu, Xiang, Zhang, Zhang, Zhao   +39 more
core   +1 more source

Controllable negative thermal expansion in NaZn13-type La(Fe, Co, Al)13 compounds

AIP Advances, 2020
Control of negative thermal expansion (NTE) is of great importance for various applications of NTE materials. Here, we report an effective way to control both the coefficient of thermal expansion (CTE) and NTE temperature-window in NaZn13-type La(Fe, Co,
Wentao Sun, Hua Zhang, Wen Li, Rongjin Huang, Yuqiang Zhao, Wei Wang, Laifeng Li   +6 more
doaj   +1 more source

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

FEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

Strong spin-lattice coupling in multiferroic HoMnO$_{3}$: Thermal expansion anomalies and pressure effect [PDF]

, 2005
Evidence for a strong spin-lattice coupling in multiferroic HoMnO_3 is derived from thermal expansion measurements along a- and c-axis. The magnetoelastic effect results in sizable anomalies of the thermal expansivities at the antiferromagnetic (T_N) and
B. Lorenz, C. dela Cruz, C. W. Chu, F. Yen, M. M. Gospodinov, R. R. Birss, Y. Q. Wang, Y. Y. Sun   +7 more
core   +1 more source

Detection of circulating tumor DNA in colorectal cancer patients using a methylation‐specific droplet digital PCR multiplex

Molecular Oncology, EarlyView.
We developed a cost‐effective methylation‐specific droplet digital PCR multiplex assay containing tissue‐conserved and tumor‐specific methylation markers. The assay can detect circulating tumor DNA with high accuracy in patients with localized and metastatic colorectal cancer.
Luisa Matos do Canto, Louise Raunkilde, Jan Lindebjerg, Mads Malik Aagaard, Christina Therkildsen, Jakob Kleif, Lars Henrik Jensen, Torben Frøstrup Hansen, Rikke Fredslund Andersen   +8 more
wiley   +1 more source

Phonon anharmonicity and negative thermal expansion in SnSe

, 2016
The anharmonic phonon properties of SnSe in the Pnma phase were investigated with a combination of experiments and first-principles simulations. Using inelastic neutron scattering (INS) and nuclear resonant inelastic X-ray scattering (NRIXS), we have ...
Abernathy, Douglas L., Bansal, Dipanshu, Delaire, Olivier, Hong, Jiawang, Hu, Michael Y., Li, Chen W., May, Andrew F., Porter, Wallace   +7 more
core   +2 more sources