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383 results on '"Mühlbauer, M."'

1. Interplay of chiral and helical states in a Quantum Spin Hall Insulator lateral junction

Author

Calvo, M. R., de Juan, F., Ilan, R., Fox, E. J., Bestwick, A. J., Mühlbauer, M., Wang, J., Ames, C., Leubner, P., Brüne, C., Zhang, S. C., Buhmann, H., Molenkamp, L. W., and Goldhaber-Gordon, D.

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

We study the electronic transport across an electrostatically-gated lateral junction in a HgTe quantum well, a canonical 2D topological insulator, with and without applied magnetic field. We control carrier density inside and outside a junction region independently and hence tune the number and nature of 1D edge modes propagating in each of those regions. Outside the 2D gap, magnetic field drives the system to the quantum Hall regime, and chiral states propagate at the edge. In this regime, we observe fractional plateaus which reflect the equilibration between 1D chiral modes across the junction. As carrier density approaches zero in the central region and at moderate fields, we observe oscillations in resistance that we attribute to Fabry-Perot interference in the helical states, enabled by the broken time reversal symmetry. At higher fields, those oscillations disappear, in agreement with the expected absence of helical states when band inversion is lifted., Comment: 5 pages, 4 figures, supp. mat

Published
2017
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2. Homogeneity of lithium distribution in cylinder-type Li-ion batteries

Author

Senyshyn, A., Mühlbauer, M. J., Dolotko, O., Hofmann, M., and Ehrenberg, H.

Subjects
Condensed Matter - Materials Science
Abstract

Spatially-resolved neutron powder diffraction with gauge volume 2x2x20 mm3 has been applied to probe the lithium concentration in the graphite anode of different Li-ion cells of 18650-type in situ in charged state. Structural studies performed in combination with electrochemical measurements and X-ray computed tomography under real cell operating conditions unambiguously revealed non-homogeneity of lithium distribution in the graphite anode. Deviations from a homogeneous behaviour have been found in both radial and axial directions of 18650-type cells and were discussed in the frame of cell geometry and electrical connection of electrodes, which might play a crucial role in the homogeneity of the lithium distribution in the active materials within each electrode.

Published
2015

3. One-dimensional weak antilocalization and band Berry phases in HgTe wires

Author

Mühlbauer, M., Budewitz, A., Büttner, B., Tkachov, G., Hankiewicz, E. M., Brüne, C., Buhmann, H., and Molenkamp, L. W.

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

We study the weak antilocalization (WAL) effect in the magnetoresistance of narrow HgTe wires fabricated in quantum wells (QWs) with normal and inverted band ordering. Measurements at different gate voltages indicate that the WAL is only weakly affected by Rashba spin-orbit splitting and persists when the Rashba splitting is about zero. The WAL signal in wires with normal band ordering is an order of magnitude smaller than for inverted ones. These observations are attributed to a Dirac-like topology of the energy bands in HgTe QWs. From the magnetic-field and temperature dependencies we extract the dephasing lengths and band Berry phases. The weaker WAL for samples with a normal band structure can be explained by a non-universal Berry phase which always exceeds \pi, the characteristic value for gapless Dirac fermions., Comment: 5 pages, 3 figures

Published
2013
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4. Scales in nuclear matter: Chiral dynamics with pion nucleon form factors

Author

Kaiser, N., Mühlbauer, M., and Weise, W.

Subjects
Nuclear Theory
Abstract

A systematic calculation of nuclear matter is performed which includes the long-range correlations between nucleons arising from one- and two-pion exchange. Three-body effects from $2\pi$-exchange with excitations of virtual $\Delta(1232)$-isobars are also taken into account in our diagrammatic calculation of the energy per particle $\bar E(k_f)$. In order to eliminate possible high-momentum components from the interactions we introduce at each pion-baryon vertex a form factor of monopole type. The empirical nuclear matter saturation point, $\rho_0 \simeq 0.16 $fm$^{-3}$, $\bar E_0\simeq -16 $MeV, is well reproduced with a monopole mass of $\Lambda \simeq 4\pi f_\pi \simeq 1.16 $GeV. As in the recent approach based on the universal low-momentum $NN$-potential $V_{\rm low-k}$, the inclusion of three-body effects is crucial in order to achieve saturation of nuclear matter. We demonstrate that the dependence of the pion-exchange contributions to $\bar E(k_f)$ on the ''resolution'' scale $\Lambda$ can be compensated over a wide range of $\Lambda$ by counterterms with two ''running'' contact-couplings. As a further application we study the in-medium chiral condensate $<\bar q q >(\rho)$ beyond the linear density approximation. For $\rho \leq 1.5 \rho_0$ we find small corrections from the derivative $d \bar E(k_f)/d m_\pi$, which are stable against variations of the monopole regulator mass $\Lambda$., Comment: 13 pages, 6 figures

Published
2006
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5. Muon transfer from deuterium to helium

Author

Augsburger, M., Ackerbauer, P., Breunlich, W. H., Cargnelli, M., Chatellard, D., Egger, J. -P., Gartner, B., Hartmann, F. J., Huot, O., Jacot-Guillarmod, R., Kammel, P., King, R., Knowles, P., Kosak, A., Lauss, B., Marton, J., Muehlbauer, M., Mulhauser, F., Petitjean, C., Prymas, W., Schaller, L. A., Schellenberg, L., Schneuwly, H., Tresch, S., von Egidy, T., and Zmeskal, J.

Subjects
Nuclear Experiment
Abstract

We report on an experiment at the Paul Scherrer Institute, Villigen, Switzerland measuring x rays from muon transfer from deuterium to helium. Both the ground state transfer via the exotic dmu3,4He* molecules and the excited state transfer from mud* were measured. The use of CCD detectors allowed x rays from 1.5 keV to 11 keV to be detected with sufficient energy resolution to separate the transitions to different final states in both deuterium and helium. The x-ray peaks of the dmu3He* and dmu4He* molecules were measured with good statistics. For the D2+3He mixture, the peak has its maximum at E_dmu3He = 6768 +- 12 eV with FWHM Gamma_dmu3He = 863 +- 10 eV. Furthermore the radiative branching ratio was found to be kappa_dmu3He = 0.301 +- 0.061. For the D_2+4He mixture, the maximum of the peak lies at E_dmu4He = 6831 +- 8 eV and the FWHM is Gamma_dmu4He = 856 +- 10 eV. The radiative branching ratio is kappa_dmu4He = 0.636 +- 0.097. The excited state transfer is limited by the probability to reach the deuterium ground state, q_1s. This coefficient was determined for both mixtures: q^3He_1s = 68.9 +- 2.7% and q^4He_1s = 90.1 +- 1.5., Comment: 9 pages, 11 figures

Published
2003
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7. A Precision Measurement of Nuclear Muon Capture on 3He

Author

Ackerbauer, P., Balin, D. V., Baturin, V. M., Beer, G. A., Breunlich, W. H., Case, T., Crowe, K., Daniel, H., Deutsch, J., Govaerts, J., Grigoriev, Yu. S., Hartmann, F. J., Kammel, P., King, R., Lauss, B., Maev, E. M., Markushin, V. E., Marton, J., Muehlbauer, M., Petitjean, C., Petitjean, Th., Petrov, G. E., Prieels, R., Prymas, W., Schott, W., Semenchuk, G. G., Smirenin, Yu. V., Vorobyov, A. A., Voropaev, N. I., and Wojciechowski, P.

Subjects
High Energy Physics - Phenomenology, Nuclear Experiment
Abstract

The muon capture rate in the reaction mu- 3He -> nu + 3H has been measured at PSI using a modular high pressure ionization chamber. The rate corresponding to statistical hyperfine population of the mu-3He atom is (1496.0 +- 4.0) s^-1. This result confirms the PCAC prediction for the pseudoscalar form factors of the 3He-3H system and the nucleon., Comment: 13 pages, 6 PostScript figures

Published
1997
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10. Der Huchen stirbt aus – was tun? Gefährdungsfaktoren und notwendige Maßnahmen in Bayern und Österreich

Author

Schmutz, S., Jungwirth, M., Ratschan, C., Siemens M. V., Guttmann, S., Paintner, S., Unfer, G., Weiss, S., Hanfland, S., Schenekar, T., Schubert, M., Brunner, H., Born, O., Woschitz, G., Gum, B., Friedl, T., Komposch, C., Mühlbauer, M., Honsig-Erlenburg, W., Hackländer, K., Haidvogl, G., Eberstaller, J., Friedrich, T., Geist, J., Gumpinger, C., Graf, C., Hofpointner, M., Honsig-Erlenburg, G., Latzer, D., Pinter, K., Rechberger, A., Schähle, Z., Schotzko, N., Seliger, C., Sutter, G., Schröder, W., and Zauner, G.

Subjects
Danube Salmon, Conservation status, Austria, Extinction risk, River channelisation, Bavaria, Fish predators, Hydropower, River restoration
Abstract

Originally, the Danube salmon (Hucho hucho) occurred in Bavaria and Austria in more than 250 rivers occupying more than 7,400 km of rivers. Nowadays, populations in »very good« and »good« status exist in only 0.7 % and 7.1 % of the original distribution. Therefore, the Danube salmon is classified as an endangered species. Due to ongoing stock declines the Danube salmon is running the risk to become a critically endangered species soon. The main reasons for the declines are river channelization and hydropower development. In addition, climate change may further contribute to stock declines in lowland river sections due to exceedance of water temperature limits of this cold-water species. Furthermore, Danube salmon and prey fish populations have lost their resilience to cope with re-established populations of fish predators (cormorant, goosander, fish otter) leading to ongoing population declines. Effective protection against further degradations such as new hydropower developments is required to safeguard the Danube salmon remaining populations. Furthermore, degraded rivers need to be restored and fish predators have to be managed to allow recovery of Danube salmon and prey fish populations. Due to the precarious situation conservation and restoration actions have to be implemented immediately.

Published
2023
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13. Precision Measurement of Nuclear Muon Capture by 3He

Author

Balin, D. V., Baturin, V. N., Grigoriev, Yu. S., Maev, E. M., Petrov, G. E., Semenchuk, G. G., Smirenin, Yu. V., Vorobyov, A. A., Voropaev, N. I., Deutsch, J., Govaerts, J., Prieels, R., Ackerbauer, P., Breunlich, W. H., Kammel, P., Lauss, B., Marton, J., Prymas, W., Egger, J., Petitjean, C., Petitjean, Th., van den Brandt, B., Daniel, H., Hartmann, F. J., Mühlbauer, M., Schott, W., von Egidy, T., Wojciechowski, P., Case, T., Crowe, K. M., Markushin, V. E., Beer, G. A., Mitter, H., editor, Plessas, W., editor, and Guardiola, Rafael, editor

Published
1996
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18. Direct Measurement of Sticking in Muon Catalyzed DT Fusion and Physics of 'Hot' µt Atoms

Author

Lou, K., Petitjean, C., Case, T., Crowe, K. M., Breunlich, W. H., Jeitler, M., Kammel, P., Lauss, B., Marton, J., Prymas, W., Zmeskal, J., Balin, D. V., Baturin, V. N., Grigoriev, Yu. S., Ilyin, A. I., Maev, E. M., Petrov, G. E., Semenchuk, G. G., Smirenin, Yu. V., Vorobyov, A. A., Voropaev, N. I., Baumann, P., Daniel, H., Hartmann, F. J., Mühlbauer, M., Schott, W., Wojciechowski, P., Osterwalder, K., editor, Schaller, Lukas A., editor, and Petitjean, Claude, editor

Published
1993
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31. Muon transfer from protium to helium isotopes at low temperature

Author

Tresch, S., Ackerbauer, P., Augsburger, M., Breunlich, W.H., Cargnelli, M., Chatellard, D., Egger, J.-P., von Egidy, T., Gartner, B., Hartmann, F.J., Jacot-Guillarmod, R., Jeannet, E., King, R., Lauss, B., Marton, J., Mühlbauer, M., Mulhauser, F., Petitjean, C., Piller, C., Prymas, W., Schaller, L.A., Schellenberg, L., Schneuwly, H., Schott, W., Thalmann, Y.-A., Werthmüller, A., and Zmeskal, J.

Published
1999
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32. Final results on the μ3He-capture experiment and perspectives for μ p-capture studies

Author

Vorobyov, A.A., Ackerbauer, P., Adamczak, A., Andreev, V.A., Balin, D.V., Beer, G.A., Breunlich, W.H., Case, T., Crowe, K.M., Daniel, H., Deutsch, J., Dick, P.U., Dijksman, A., Egger, J., von Egidy, T., Faifman, M.P., Fetisov, A.A., Ganzha, V.A., Govaerts, J., Gusev, V.V., Hartmann, F.J., Herold, W.D., Kammel, P., Krivshich, A.G., Lauss, B., Maev, E.M., Markushin, V.E., Martino, J., Marton, J., Menshikov, L.I., Mühlbauer, M., Petitjean, C., Petitjean, T., Petrov, G.E., Ponomarev, L.I., Prieels, R., Prymas, W., Schapkin, G.N., Schöps, W., Schott, W., Semenchuk, G.G., Smirenin, Yu.V., and Voropaev, N.I.

Published
1999
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33. Muon transfer from ground state deuterium to helium nuclei and its temperature dependence

Author

Gartner, B., Ackerbauer, P., Augsburger, M., Breunlich, W.H., Cargnelli, M., Chatellard, D., Egger, J.-P., von Egidy, T., Hartmann, F.J., Jacot-Guillarmod, R., Jeannet, E., Kammel, P., King, R.C., Kosak, A., Lauss, B., Marton, J., Mühlbauer, M., Mulhauser, F., Petitjean, C., Piller, C., Prymas, W., Schaller, L.A., Schellenberg, L., Schneuwly, H., Schott, W., Thalmann, Y.A., Tresch, S., Werthmüller, A., and Zmeskal, J.

Published
1999
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34. Search for muon catalyzed d 3He-fusion

Author

Maev, E.M., Balin, D.V., Case, T., Crowe, K.M., Del Rosso, A., Ganzha, V.A., Hartmann, F.J., Kozlov, S.M., Lauss, B., Maev, O.E., Mühlbauer, M., Mulhauser, F., Petitjean, C., Petrov, G.E., Sadetsky, S.M., Schapkin, G.N., Schott, W., Semenchuk, G.G., Smirenin, Yu.V., Soroka, M.A., Vasiliev, A.A., Vorobyov, A.A., Voropaev, N.I., and Zmeskal, J.

Published
1999
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36. First observation of spin flip in dμ-atoms via formation and back decay of ddμ molecules

Author

Voropaev, N.I., Balin, D.V., Breunlich, W.N., Case, T., Crowe, K.M., Daniel, H., Ganzha, V.A., Gartner, B., Hartmann, F.J., Kammel, P., Kozlov, S.M., Lauss, B., Maev, E.M., Markushin, V.E., Misko, Yu.A., Mühlbauer, M., Petitjean, C., Petrov, G.E., Prymas, W., Schapkin, G.N., Schott, W., Semenchuk, G.G., Smirenin, Yu.V., Trofimov, V.A., Vasiliev, A.A., Vorobyov, A.A., and Zmeskal, J.

Published
1999
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37. Measurement of the muon transfer rate from deuterium to 3 at low temperature

Author

Maev, E.M., Balin, D.V., Case, T., Crowe, K.M., Del Rosso, A., Ganzha, V.A., Hartmann, F.J., Kozlov, S.M., Lauss, B., Maev, O.E., Mühlbauer, M., Mulhauser, F., Petitjean, C., Petrov, G.E., Sadetsky, S.M., Schapkin, G.N., Schott, W., Semenchuk, G.G., Smirenin, Yu.V., Soroka, M.A., Vasiliev, A.A., Vorobyov, A.A., Voropaev, N.I., and Zmeskal, J.

Published
1999
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38. Insights on d μ t sticking from d μ d stripping and μ,3He capture

Author

Case, T., Balin, D.V., Breunlich, W.H., Crowe, K.M., Daniel, H., Gartner, B., Hartmann, F.J., Kammel, P., Lauss, B., Maev, E.M., Markushin, V.E., Mühlbauer, M., Petitjean, C., Petrov, G.E., Prymas, W., Schapkin, G.N., Schott, W., Semenchuk, G.G., Smirenin, Yu.V., Vasiliev, A.A., Vorobyov, A.A., Voropaev, N.I., and Zmeskal, J.

Published
1999
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39. Study of muon catalyzed dd-fusion in HD gas

Author

Semenchuk, G.G., Balin, D.V., Case, T., Crowe, K.M., Ganzha, V.A., Hartmann, F.J., Kozlov, S.M., Lauss, B., Maev, E.M., Mühlbauer, M., Petitjean, C., Petrov, G.E., Sadetsky, S.M., Schapkin, G.N., Schott, W., Smirenin, Yu.V., Soroka, M.A., Vasiliev, A.A., Vorobyov, A.A., Voropaev, N.I., and Zmeskal, J.

Published
1999
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41. Muon catalyzed fusion in deuterium gas

Author

Petitjean, C., Balin, D.V., Breunlich, W.H., Case, T., Crowe, K.M., Daniel, H., Faifman, M.P., Ganzha, V.A., Gartner, B., Hartmann, F.J., Kammel, P., Kozlov, S., Lauss, B., Maev, E.M., Markushin, V.E., Misko, Yu.A., Mühlbauer, M., Petrov, G.E., Prymas, W., Schapkin, G.N., Schott, W., Semenchuk, G.G., Smirenin, Yu.V., Trofimov, V.A., Vasiliev, A.A., Vorobyov, A.A., Voropaev, N.I., and Zmeskal, J.

Published
1999
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43. Experimental investigation of the muon transfer reaction from deuterium to helium isotopes

Author

Gartner, B., Ackerbauer, P., Breunlich, W. H., Cargnelli, M., Fischer, A., Kammel, P., King, R., Kminek, G., Lauss, B., Marton, J., Prymas, W., Steininger, E., Zmeskal, J., Petitjean, C., Chatellard, D., Egger, J. -P., Jeannet, E., Hartmann, F. J., Kosak, A., Mühlbauer, M., von Egidy, T., Piller, C., Schaller, L. A., Schellenberg, L., Schneuwly, H., Thalmann, Y. -A., Tresch, S., and Werthmüller, A.

Published
1996
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46. Precision measurement of nuclear muon capture by3He

Author

Vorobyov, A. A., Balin, D. V., Baturin, V. N., Grigoriev, Yu. S., Maev, E. M., Petrov, G. E., Semenchuk, G. G., Smirenin, Yu. V., Voropaev, N. I., Deutsch, J., Govaerts, J., Prieels, R., Ackerbauer, P., Breunlich, W. H., Kammel, P., Lauss, B., Marton, J., Prymas, W., Egger, J., Petitjean, C., Petitjean, Th., van den Brandt, B., Daniel, H., Hartmann, F. J., Mühlbauer, M., Schott, W., von Egidy, T., Wojciechowski, P., Case, T., Crowe, K. M., Markushin, V. E., and Beer, G. A.

Published
1996
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47. New precision measurements of dµd fusion

Author

Petitjean, C., Ackerbauer, P., Balin, D. V., Breunlich, W. H., Case, T., Crowe, K. M., Daniel, H., von Egidy, T., Gartner, B., Hartmann, F. J., Kammel, P., Kminek, G., Lauss, B., Maev, E. M., Markushin, V. E., Marton, J., Mühlbauer, M., Petrov, G. E., Prymas, W., Schott, W., Semenchuk, G. G., Smirenin, Yu. V., Vorobyov, A. A., Voropaev, N. I., and Zmeskal, J.

Published
1996
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48. Measurement of the heavy neutrino admixture upper limit from muon capture by3He

Author

Schott, W., Müller, S., Daniel, H., Ackerbauer, P., Balin, D. V., Baturin, V. N., Beer, G. A., Breunlich, W. H., Case, T., Crowe, K. M., Deutsch, J., Egger, J., von Egidy, T., Govaerts, J., Grigoriev, Yu. S., Hartmann, F. J., Kammel, P., Lauss, B., Maev, E. M., Markushin, V., Marton, J., Mühlbauer, M., Petitjean, C., Petitjean, T., Petrov, G. E., Prieels, R., Prymas, W., Semenchuk, G. G., Smirenin, Yu. V., Van den Brandt, B., Vorobyov, A. A., Voropaev, N. I., and Wojciechowski, P.

Published
1996
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49. Muon transfer from protium to helium

Author

Tresch, S., Ackerbauer, P., Breunlich, W. H., Cargnelli, M., Chatellard, D., Egger, J. -P., von Egidy, T., Fischer, A., Gartner, B., Hartmann, F. J., Jacot-Guillarmod, R., Jeannet, E., Kammel, P., King, R., Kminek, G., Lauss, B., Marton, J., Mühlbauer, M., Mulhauser, F., Petitjean, C., Piller, C., Prymas, W., Schaller, L. A., Schellenberg, L., Schneuwly, H., Steininger, E., Thalmann, Y. A., Werthmüller, A., and Zmeskal, J.

Published
1996
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50. Measurement of the breakup channels in nuclear muon capture by3He and4He

Author

Maev, E. M., Ackerbauer, P., Balin, D. V., Baturin, V. N., Beer, G. A., Breunlich, W. H., Case, T., Crowe, K. M., Daniel, H., Deutsch, J., von Egidy, T., Govaerts, J., Grigoriev, Yu. S., Hartmann, F. J., Kammel, P., Lauss, B., Marton, J., Mühlbauer, M., Petitjean, C., Petitjean, Th., Petrov, G. E., Prieels, R., Prymas, W., Schott, W., Semenchuk, G. G., Smirenin, Yu. V., Vorobyov, A. A., Voropaev, N. I., and Wojciechowski, P.

Published
1996
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