Results 71 to 80 of about 174,545 (215)

The Interplay of Magnetic Order with the Electronic Scattering and Crystal‐Field Effects in a Metallic Ferromagnet

Advanced Science, EarlyView.
The interplay between magnetic ordering and crystal electric field (CEF) excitations plays a pivotal role in defining the low‐energy electrodynamics of quantum materials. By probing the temperature‐dependent THz conductivity in a rare‐earth‐based metallic ferromagnet, we uncover a microscopic connection between localized and itinerant electrons ...
Payel Shee, Tanaya Halder, Chia‐Jung Yang, Nainish Tickoo, Ratiranjan Samal, Ruta Kulkarni, Shishir K. Pandey, Vikas Kashid, Ashis K. Nandy, Arumugam Thamizhavel, Anamitra Mukherjee, Shovon Pal   +11 more
wiley   +1 more source

Pseudo-Riemannian Symmetries on Heisenberg groups

, 2014
The notion of $\Gamma$-symmetric space is a natural generalization of the classical notion of symmetric space based on $\Z_2$-grading of Lie algebras.
Goze, Michel, Piu, Paola, Remm, Elisabeth   +2 more
core   +2 more sources

Microscale Mapping of Fiber Strain and Damage in Composite Wrinkled Laminates Using Computed Tomography Assisted Wide‐Angle X‐Ray Scattering

Advanced Science, EarlyView.
This study combines full‐field tomography with diffraction mapping to quantify radial (ε002$\varepsilon _{002}$) and axial (ε100$\varepsilon _{100}$) lattice strain in wrinkled carbon‐fiber specimens for the first time. Radial microstrain gradients (−14.5 µεMPa$\varepsilon \mathrm{MPa}$−1) are found to signal damage‐prone zones ahead of failure, which ...
Hoang Minh Luong, James Trevarthen, Igor Dolbnya, Wadwan Singhapong, Nicholas Pilato, Richard Butler, Jiraphant Srisuriyachot, Alexander J. G. Lunt   +7 more
wiley   +1 more source

Unified N=2 Maxwell-Einstein and Yang-Mills-Einstein Supergravity Theories in Four Dimensions

, 2005
We study unified N=2 Maxwell-Einstein supergravity theories (MESGTs) and unified Yang-Mills Einstein supergravity theories (YMESGTs) in four dimensions. As their defining property, these theories admit the action of a global or local symmetry group that ...
, , , B. de Wit, B.A. Rozenfeld, B.N. Allison, C.M. Hull, C.M. Hull, C.M. Hull, E.G. Goodaire, F.P. Zen, For a review of electric magnetic duality, G.A. Diamandis, H. Freudenthal, I.L. Kantor, J. Louis, J. Tits, J. Tits, J.R. Ellis, K. Mc Crimmon, K. McCrimmon, L. Jarv, L. Michel, M. Günaydin, M. Günaydin, M. Günaydin, M. Koecher, M. Koecher, Marco Zagermann, Murat Günaydin, P. Fré, P. Jordan, S. Cecotti, S. McReynolds, Sean McReynolds, See N. Jacobson, T. Mohaupt, T. Mohaupt   +37 more
core   +1 more source

Invariant Lorentzian orders on simply connected Lie groups

Arkiv för Matematik, 1988
The study of the causal structure of space-time has led a number of authors to consider partially ordered Lie groups. With an invariant semigroup of positive elements, there is associated an invariant positive cone in the Lie algebra. The author considers the case of an invariant Lorentzian cone (one half of the double cone of a Lorentzian quadratic ...
openaire   +3 more sources

Lattice Dynamics of Rutile Germanium Dioxide (r‐GeO2)

Advanced Electronic Materials, EarlyView.
The rutile polymorph of GeO2 is a promising ultra‐wide bandgap material, but key properties for its technological exploitation remain poorly understood. Using polarization angle‐resolved Raman spectroscopy, we resolve long‐standing uncertainties in the energies of Raman‐active phonons and extract relative Raman tensor elements.
Hans Tornatzky, Zbigniew Galazka, Tobias Schulz, Roland Gillen, Markus R. Wagner   +4 more
wiley   +1 more source

Note on the holonomy groups of pseudo-Riemannian manifolds

, 2013
For an arbitrary subalgebra $\mathfrak{h}\subset\mathfrak{so}(r,s)$, a polynomial pseudo-Riemannian metric of signature $(r+2,s+2)$ is constructed, the holonomy algebra of this metric contains $\mathfrak{h}$ as a subalgebra.
Galaev, Anton S.
core   +1 more source

The Björling problem for minimal surfaces in a Lorentzian three-dimensional Lie group [PDF]

Annali di Matematica Pura ed Applicata (1923 -), 2014
In this paper we will show the existence and uniqueness of the solution of the Bj rling problem for minimal surfaces in a 3-dimensional Lorentzian Lie group.
Cintra, Adriana A., Mercuri, Francesco, Onnis, Irene I.   +2 more
openaire   +2 more sources

Cadmium and Zinc‐Doped p‐type Sb2Se3 Single Crystals and Solar Cells

Advanced Energy and Sustainability Research, EarlyView.
Cd and Zn were assessed as candidate p‐type dopants in Sb2Se3 single crystals in concentrations between 1016‐1020 cm−3. Both are effective in inducing p‐type conductivity, however Cd doped crystals exhibit lower resistivity across a wider range of dopant levels.
Thomas P. Shalvey, Theodore D. C. Hobson, Frank Herklotz, Reelika Kaupmees, Aeshah A. Almushawwah, Bradley G. Lewis, Christopher H. Don, Sean R. Kavanagh, David O. Scanlon, Vin Dhanak, Maarja Grossberg‐Kuusk, Eduard Lavrov, Ken Durose, Jonathan D. Major   +13 more
wiley   +1 more source

Homogeneous Lorentzian manifolds of a semisimple group

, 2011
We describe the structure of $d$-dimensional homogeneous Lorentzian $G$-manifolds $M=G/H$ of a semisimple Lie group $G$. Due to a result by N. Kowalsky, it is sufficient to consider the case when the group $G$ acts properly, that is the stabilizer $H$ is
Adams, Adams, Adams, Adams, Adams, Adams, Adams, Adams, Adams, Adams, Alekseevsky, Alekseevsky, Barbot, D.V. Alekseevsky, Deffaf, D’Ambra, Helgason, Kowalsky, Witte, Zeghib   +19 more
core   +1 more source