Papers published on a yearly basis
Papers
More filters
••
TL;DR: In this paper, the authors examined a real system, half-Heusler GdBiPt, as a candidate for topological antiferromagnetism and found that the magnetic moments of the gadolinium atoms form ferromagnetic sheets which are stacked ant-romagneticically along the body diagonal.
Abstract: A topological insulator is a state of matter which does not break any symmetry and is characterized by topological invariants, the integer expectation values of nonlocal operators. Antiferromagnetism, on the other hand, is a broken symmetry state in which the translation symmetry is reduced and time reversal symmetry is broken. Can these two phenomena coexist in the same material? A proposal by Mong et al. [Phys. Rev. B 81, 245209 (2010)] asserts that the answer is yes. Moreover, it is theoretically possible that the onset of antiferromagnetism enables the nontrivial topology since it may create spin-orbit coupling effects which are absent in the nonmagnetic phase. The current work examines a real system, half-Heusler GdBiPt, as a candidate for topological antiferromagnetism. We find that the magnetic moments of the gadolinium atoms form ferromagnetic sheets which are stacked antiferromagnetically along the body diagonal. This magnetic structure may induce spin-orbit coupling on band electrons as they hop perpendicular to the ferromagnetic sheets.
60 citations
••
TL;DR: AECL is studying advanced reactor designs where natural convection is an important design feature in heat removal processes as discussed by the authors, and the use of a flashing-driven, natural-circulation system to remove moderator heat is being considered.
60 citations
••
TL;DR: Backscattering of MeV 4He+ ions has been used to show that the interplanar spacing between the topmost and second layers of a clean Pt(111) crystal is identical to that in the bulk (to ± 0.4%); the surface is unrelaxed.
60 citations
••
60 citations
••
TL;DR: When all the cells in cycle including mitoses were prelabeled with H3TdR in older tumors, the fraction of labeled mitoses did not decline for a considerable period after transplantation into new hosts, suggesting that the early rise in mitoses is not due to a flow of resting cells from a G2 store (G2‐Go transition), but a reflection of a lag of the mitotic process relative to other stages during the initial readjustment of the cycle.
Abstract: Growth deceleration of an Ehrlich ascites tumor with increasing mass is associated with a prolongation of the cell cycle and a decline in the growth fraction. These effects are reversed upon transfer of cells from an older tumor into a new host. Studies were made to locate the stages at which a cell cycle could be suspended or resumed. Transplantation caused a prompt rise in both mitotic and flash H3TdR labeling indices. When all the cells in cycle including mitoses were prelabeled with H3TdR in older tumors, the fraction of labeled mitoses did not decline for a considerable period after transplantation into new hosts. This suggests that the early rise in mitoses is not due to a flow of resting (Go) cells from a G2 store (G2-Go transition). It appears rather to be a reflection of a lag of the mitotic process relative to other stages during the initial readjustment of the cycle. A prompt rise in flash H3TdR indices in the transplants suggested cell entry into S from either a suspended GI (G1-Go transition) or a suspended S (S-Go transition). These possibilities were examined by relating micro-spectrophotometric estimates of DNA to the cell cycle stage as revealed by H3TdR autoradiography. Since Go cells had DNA values corresponding to GI, it was concluded that decycling or recycling could occur only after mitosis and before DNA synthesis.
59 citations
Authors
Showing all 2298 results
Name | H-index | Papers | Citations |
---|---|---|---|
Michael D. Guiver | 78 | 288 | 20540 |
Robert J. Birgeneau | 78 | 587 | 22686 |
Mike D. Flannigan | 71 | 211 | 21327 |
Martin T. Dove | 61 | 396 | 14767 |
Luis Rodrigo | 58 | 341 | 12963 |
André Longtin | 56 | 260 | 16372 |
David Mitlin | 56 | 196 | 15479 |
John Katsaras | 55 | 220 | 9263 |
John E. Greedan | 55 | 391 | 12171 |
Gang Li | 48 | 406 | 7713 |
Matthew G. Tucker | 45 | 224 | 7288 |
Bruce D. Gaulin | 45 | 284 | 6698 |
Erick J. Dufourc | 43 | 144 | 5882 |
Norbert Kučerka | 43 | 119 | 7319 |
Stephen J. Skinner | 42 | 194 | 8522 |