Results 91 to 100 of about 37,351 (331)

Antiferromagnetism and phase separation in the t-J model at low doping: a variational study

, 2003
Using Gutzwiller-projected wave functions, I estimate the ground-state energy of the t-J model for several variational states relevant for high-temperature cuprate superconductors.
D. A. Ivanov, D. P. Arovas, N. Trivedi, S. A. Kivelson   +3 more
core   +1 more source

Strain Engineering of Magnetoresistance and Magnetic Anisotropy in CrSBr

Advanced Materials, EarlyView.
Biaxial compressive strain significantly enhances magnetoresistance and critical saturation fields in thin flakes of the 2D magnet CrSBr, along all three crystallographic axes. First‐principles calculations link these effects to strain‐induced increases in exchange interactions and magnetic anisotropy.
Eudomar Henríquez‐Guerra, Alberto M. Ruiz, Marta Galbiati, Álvaro Cortés‐Flores, Daniel Brown, Esteban Zamora‐Amo, Lisa Almonte, Andrei Shumilin, Juan Salvador‐Sánchez, Ana Pérez‐Rodríguez, Iñaki Orue, Andrés Cantarero, Andres Castellanos‐Gomez, Federico Mompeán, Mar Garcia‐Hernandez, Efrén Navarro‐Moratalla, Enrique Diez, Mario Amado, José J. Baldoví, M. Reyes Calvo   +19 more
wiley   +1 more source

Photocurrent Spectroscopy of Dark Magnetic Excitons in 2D Multiferroic NiI2

Advanced Science
Two‐dimensional (2D) antiferromagnetic (AFM) semiconductors are promising components of opto‐spintronic devices due to terahertz operation frequencies and minimal interactions with stray fields. However, the lack of net magnetization significantly limits
Dmitry Lebedev, J. Tyler Gish, Ethan S. Garvey, Thomas W. Song, Qunfei Zhou, Luqing Wang, Kenji Watanabe, Takashi Taniguchi, Maria K. Chan, Pierre Darancet, Nathaniel P. Stern, Vinod K. Sangwan, Mark C. Hersam   +12 more
doaj   +1 more source

Pressure-induced superconductivity in Eu$_{0.5}$Ca$_{0.5}$Fe$_2$As$_2$ : FeAs-based superconductivity hidden by antiferromagnetism of Eu sublattice

, 2009
To clarify superconductivity in EuFe2As2 hidden by antiferromagnetism of Eu2+, we investigated a Ca-substituted sample, Eu0.5Ca0.5Fe2As2, under high pressure.
Alireza P. L., Anumpam, Chen X. F., de la Cruz C., Eisaki H., He Y., Herrero-Martin J., Ishikawa F., Ishikawa M., Jeevan H. S., Jiang S., Jørgensen J.-E., Kamihara Y., Kasahara S., Kotegawa H., Kotegawa H., Lee H., Leithe-Jasper A., Miclea C. F., Ni N., Nomura T., Park T., Ren Z., Ren Z., Rotter M., Rotter M., Sasmal K., Sefat A. S., Terashima T., Torikachvili M. S., Wu G., Xiao Y., Yu W.   +32 more
core   +1 more source

Theory of optical axion electrodynamics and application to the Kerr effect in topological antiferromagnets [PDF]

, 2022
Junyeong Ahn, Su‐Yang Xu, Ashvin Vishwanath   +2 more
openalex   +1 more source

Spin and Charge Control of Topological End States in Chiral Graphene Nanoribbons on a 2D Ferromagnet

Advanced Materials, EarlyView.
Chiral graphene nanoribbons on a ferromagnetic gadolinium‐gold surface alloy display tunable spin and charge states at their termini. Atomic work function variations and exchange fields enabe transitions between singlet, doublet, and triplet configurations.
Leonard Edens, Francisco Romero‐Lara, Trisha Sai, Kalyan Biswas, Manuel Vilas‐Varela, Thomas Frederiksen, Diego Peña, Fabian Schulz, Jose Ignacio Pascual   +8 more
wiley   +1 more source

Insights into a Defective Potassium Sulfido Cobaltate: Giant Magnetic Exchange Bias, Ionic Conductivity, and Electrical Permittivity

Advanced Electronic Materials
The novel potassium sulfido cobaltate, K2[Co3S4] is introduced, with 25% vacancies of the cobalt positions within a layered anionic sublattice. The impedance and dielectric investigations indicate a remarkable ionic conductivity of 21.4 mS cm−1 at room ...
M. Reza Ghazanfari, Simon Steinberg, Konrad Siemensmeyer, Johannes C. Vrijmoed, Mirko Tallu, Stefanie Dehnen, Günther Thiele   +6 more
doaj   +1 more source

Induced-Moment Weak Antiferromagnetism and Orbital Order on the Itinerant-Localized Duality Model with Nested Fermi Surface: A Possible Origin of Exotic Magnetism in URu${}_{2}$Si$_{2}$

, 1998
The weak antiferromagnetism of URu${}_{2}$Si${}_{2}$ is discussed on the basis of a duality model which takes into account salient features of both itinerant fermions and "localized" component of spin degrees of freedom.
Barzykin V., Broholm C., Broholm C., Fåk B., Grover B., Ikeda H., Kuramoto Y., Kuramoto Y., Maple M. B., Matsuda K., Mentink S. A. M., Niewenhuys G. J., Okuno Y., Palstra T. T. M., Park J.-G., Radwański R. J., Ronzing G. J., Santini P., Schlabitz W., Sikkema A. E., Wang Y.-L., Watanabe S.   +21 more
core   +1 more source

Microscopic Insights into Magnetic Warping and Time‐Reversal Symmetry Breaking in Topological Surface States of Rare‐Earth‐Doped Bi2Te3

Advanced Materials, EarlyView.
Magnetic doping of the topological insulator Bi2Te3 with erbium adatoms induces out‐of‐plane magnetism and breaks time‐reversal symmetry, opening a Dirac gap and driving a Fermi surface transition from hexagonal to star‐of‐David geometry. Microscopy, spectroscopy, and magnetic dichroism reveal atomically controlled magnetic interactions that tailor the
Beatriz Muñiz Cano, Fabián Calleja, Ji Dai, Massimo Tallarida, Vera Marinova, Alessandro Barla, Marc G. Cuxart, Pierluigi Gargiani, Gonzalo N. Molina, José Angel Silva‐Guillén, Adriana I. Figueroa, Kevin García‐Díez, Sergio O. Valenzuela, Aitor Mugarza, Amadeo L. Vázquez de Parga, Rodolfo Miranda, Francisco Guinea, Manuela Garnica, Miguel A. Valbuena   +18 more
wiley   +1 more source

Itinerancy and Hidden Order in $URu_2Si_2$

, 2005
We argue that key characteristics of the enigmatic transition at $T_0= 17.5K $ in $URu_2Si_2$ indicate that the hidden order is a density wave formed within a band of composite quasiparticles, whose detailed structure is determined by local physics.
Bernal O O Moroz M E Mydosh J A MacLaughlin D E Lukefahr H G Gortenmulder T, Bull M J, Capponi S, Chandra P, Fjaerestad J O Marston J B Schollwock U, Halperin B I, Harrison N, Kim K H, Kiss A Fazekas P, Luke G M, Mason T E, Mineev V P Zhitomirsky M E, Motoyama G, Mydosh J A, P Chandra, P Coleman, Schlichter C, Sikkema A E, V Tripathi, Varma C M Zhu L   +19 more
core   +1 more source