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Vortex lattices and broken time reversal symmetry in the topological superconductor UPt3

Autor: Avers, K. E., Gannon, W. J., Kuhn, S. J., Halperin, W. P., Sauls, J. A., DeBeer-Schmitt, L., Dewhurst, C. D., Gavilano, J., Nagy, G., Gasser, U., Eskildsen, M. R.

Publikováno v: Nat. Phys. 16, 531-535 (2020)

The topological superconductor UPt3, has three distinct vortex phases, a strong indication of its unconventional character. Using small-angle neutron scattering we have probed the vortex lattice in the UPt3 B phase with the magnetic field along the c

Externí odkaz: http://arxiv.org/abs/1812.05690

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Evolution of magneto-crystalline anisotropies in Mn$_{1-x}$Fe$_x$Si and Mn$_{1-x}$Co$_x$Si as inferred from small-angle neutron scattering and bulk properties

Autor: Kindervater, J., Adams, T., Bauer, A., Haslbeck, F., Chacon, A., Mühlbauer, S., Jonietz, F., Neubauer, A., Gasser, U., Nagy, G., Martin, N., Häußler, W., Georgii, R., Garst, M., Pfleiderer, C.

Publikováno v: Phys. Rev. B 101, 104406 (2020)

We report a comprehensive small-angle neutron scattering~(SANS) study of Mn$_{1-x}$Fe$_{x}$Si at zero magnetic field. To delineate changes of magneto-crystalline anisotropies (MCAs) from effects due to defects and disorder, we recorded complementary

Externí odkaz: http://arxiv.org/abs/1811.12379

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Temperature Dependence of the Magnetic Penetration Depth and Nodal Gap Structure of UPt$_3$ from Small Angle Neutron Scattering

Autor: Gannon, W. J., Halperin, W. P., Rastovski, C., Schlesinger, K. J., Hlevyack, J., Eskildsen, M. R., Vorontsov, A. B., Gavilano, J., Gasser, U., Nagy, G.

Spanning a broad range of physical systems, complex symmetry breaking is widely recognized as a hallmark of competing interactions. This is exemplified in superfluid $^3$He which has multiple thermodynamic phases with spin and orbital quantum numbers

Externí odkaz: http://arxiv.org/abs/1302.4144

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Observation of excited states in a graphene double quantum dot

Autor: Molitor, F., Knowles, H., Dröscher, S., Gasser, U., Choi, T., Roulleau, P., Güttinger, J., Jacobsen, A., Stampfer, C., Ensslin, K., Ihn, T.

Publikováno v: EPL 89, 67005 (2010)

We study a graphene double quantum dot in different coupling regimes. Despite the strong capacitive coupling between the dots, the tunnel coupling is below the experimental resolution. We observe additional structures inside the finite-bias triangles

Externí odkaz: http://arxiv.org/abs/1001.4700

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Akademický článek

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Statistical electron excitation in a double quantum dot induced by two independent quantum point contacts

Autor: Gasser, U., Gustavsson, S., Küng, B., Ensslin, K., Ihn, T., Driscoll, D. C., Gossard, A. C.

Publikováno v: Phys. Rev. B 79, 035303 (2009)

We investigate experimentally the influence of current flow through two independent quantum point contacts to a nearby double quantum dot realized in a GaAs-AlGaAs heterostructure. The observed current through the double quantum dot can be explained

Externí odkaz: http://arxiv.org/abs/0808.2905

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