Structural investigations on $\epsilon$-FeGe at high pressure and low temperature (2007)
Wilhelm, H., Schmidt, M., Cardoso-Gil, R., Burkhardt, U., Hanfland, M., Schwarz, U., ...
The structural parameters of $\epsilon$-FeGe have been determined at ambient conditions using single crystal refinement. Powder diffraction have been carried out to determine structural properties...
Optical evidence for heavy charge carriers in FeGe (2007)
Guritanu, V., Teyssier, J., Jarlborg, T., Wilhelm, H., Schmidt, M., ...
The optical spectrum of the cubic helimagnetic metal FeGe has been investigated in the frequency range from 0.01 - 3.1 eV for different temperatures from 30 K to 296 K. The optical conductivity shows...
Metallic State in Cubic FeGe Beyond Its Quantum Phase Transition (2007)
Pedrazzini, P., Wilhelm, H., Jaccard, D., Jarlborg, T., Schmidt, M., Hanfland, M., ...
Optical evidence for heavy charge carriers in FeGe (2007)
Guritanu, V., Teyssier, J., Jarlborg, T., Wilhelm, H., Schmidt, M., ...
Comment on "Bose-Einstein condensation of magnons in Cs2CuCl4" - Reply (2007)
Radu, T., Wilhelm, H., Yushankhai, V., Kovrizhin, D., Coldea, R., Tylczynski, Z., ...
Structural investigations of ε-FeGe at high pressure and low temperature (2007)
Wilhelm, H., Schmidt, M., Cardoso-Gil, R., Burkhardt, U., Hanfland, M., Schwarz, U., ...
Comment on "Bose-Einstein condensation of magnons in Cs2CuCl4" (2007)
Radu, T., Wilhelm, H., Yushankhai, V., Kovrizhin, D., Coldea, R., Tylczynski, Z., ...
Metallic State in Cubic FeGe beyond its Quantum Phase Transition (2006)
Pedrazzini, P., Wilhelm, H., Jaccard, D., Jarlborg, T., Schmidt, M., Hanfland, M., ...
We report on results of electrical resistivity and structural investigations on the cubic modification of FeGe under high pressure. The long-wavelength helical order ($T_C=280$ K) is suppressed at a...
Magnetic phase transitions in the two-dimensional frustrated quantum antiferromagnet Cs2CuCl4 (2006)
Tokiwa, Y., Radu, T., Coldea, R., Wilhelm, H., Tylczynski, Z., Steglich, F.
We report magnetization and specific heat measurements in the 2D frustrated spin-1/2 Heisenberg antiferromagnet Cs2CuCl4 at temperatures down to 0.05 K and high magnetic fields up to 11.5 T applied...
Magnetic phase transitions in the two-dimensional frustrated quantum antiferromagnet Cs2CuCl4 (2006)
Tokiwa, Y., Radu, T., Coldea, R., Wilhelm, H., Tylczynski, Z., Steglich, F.
Reply [Comment on "Bose-Einstein condensation of magnons in Cs2CuCl4" - Reply] (2006)
Radu, T., Wilhelm, H., Yushankhai, V., Kovrizhin, D., Coldea, R., Tylczynski, Z., ...
Comment on "Bose-Einstein condensation of magnons in Cs2CuCl4" - Reply (2006)
Radu, T., Wilhelm, H., Yushankhai, V., Kovrizhin, D., Coldea, R., Tylczynski, Z., ...
Bose-Einstein Condensation of Magnons in Cs2CuCl4 (2005)
Radu, T., Wilhelm, H., Yushankhai, V., Kovrizhin, D., Coldea, R., Tylczynski, Z., ...
We report on results of specific heat measurements on single crystals of the frustrated quasi-2D spin-1/2 antiferromagnet Cs_2CuCl_4 (T_N=0.595 K) in external magnetic fields B30 mK. Decreasing B...
High-pressure transport properties of CeRu2Ge2 (2005)
Wilhelm,H., Jaccard,D., Zlatić,V., Monnier,R., Delley,B., Coqblin,B.
Specific heat of CeIn3-xSnx single crystals in the vicinity of the quantum critical point (2005)
Rus,T., Wilhelm,H., Stockert,O., Lühmann,T., Caroca-Canales,N., Sereni,J. G., ...
Electrical resistivity of YbRh2Si2 at high pressure (2005)
Dionicio,G., Wilhelm,H., Sparn,G., Ferstl,J., Geibel,C., Steglich,F.
Bose-Einstein Condensation of Magnons in Cs2CuCl4 (2005)
Radu,T., Wilhelm,H., Yushankhai,V., Kovrizhin,D., Coldea,R., Tylczynski,Z., ...
High-pressure transport properties of CeRu2Ge2 (2005)
Wilhelm, H., Jaccard, D., Zlatić, V., Monnier, R., Delley, B., Coqblin, B.
Specific heat of CeIn3-xSnx single crystals in the vicinity of the quantum critical point (2005)
Rus, T., Wilhelm, H., Stockert, O., Lühmann, T., Caroca-Canales, N., Sereni, J. G., ...
Electrical resistivity of YbRh2Si2 at high pressure (2005)
Dionicio, G., Wilhelm, H., Sparn, G., Ferstl, J., Geibel, C., Steglich, F.
Bose-Einstein Condensation of Magnons in Cs2CuCl4 (2005)
Radu, T., Wilhelm, H., Yushankhai, V., Kovrizhin, D., Coldea, R., Tylczynski, Z., ...
Bose-Einstein condensation of magnons in Cs2CuCl4 (2005)
Radu, T., Wilhelm, H., Yushankhai, V., Kovrizhin, D., Coldea, R., Tylczynski, Z., ...
High-pressure transport properties of CeRu_2Ge_2 (2004)
Wilhelm, H., Jaccard, D., Zlatic, V., Monnier, R., Delley, B., Coqblin, B.
The pressure-induced changes in the temperature-dependent thermopower S(T) and electrical resistivity \rho(T) of CeRu_2Ge_2 are described within the single-site Anderson model. The Ce-ions are...
Probing the phase diagram of CeRu_2Ge_2 by thermopower at high pressure (2004)
The temperature dependence of the thermoelectric power, S(T), and the electrical resistivity of the magnetically ordered CeRu_2Ge_2 (T_N=8.55 K and T_C=7.40 K) were measured for pressures p < 16 GPa...
The break-up of heavy electrons at a quantum critical point (2003)
Custers,J., Gegenwart,P., Wilhelm,H., Neumaier,K., Tokiwa,Y., Trovarelli,O., ...
The break up of heavy electrons at a quantum critical point (2003)
Custers, J., Gegenwart, P., Wilhelm, H., Neumaier, K., Tokiwa, Y., Trovarelli, O., ...
The point at absolute zero where matter becomes unstable to new forms of order is called a quantum critical point (QCP). The quantum fluctuations between order and disorder that develop at this point...
Quantum criticality in YbRh2Si2 (2003)
Custers,J., Gegenwart,P., Neumaier,K., Wilhelm,H., Oeschler,N., Ishida,K., ...
Recent trends in heavy-fermion physics (2003)
Steglich,F., Sato,N. K., Aso,N., Gegenwart,P., Custers,J., Neumaier,K., ...
Quantum criticality in YbRh2Si2 (2003)
Custers, J., Gegenwart, P., Neumaier, K., Wilhelm, H., Oeschler, N., Ishida, K., ...
The break-up of heavy electrons at a quantum critical point (2003)
Custers, J., Gegenwart, P., Wilhelm, H., Neumaier, K., Tokiwa, Y., Trovarelli, O., ...
Recent trends in heavy-fermion physics (2003)
Steglich, F., Sato, N. K., Aso, N., Gegenwart, P., Custers, J., Neumaier, K., ...
Alternating current calorimetry at very high pressure and low temperature (2002)
The specific heat of CePd2.02Ge1.98 has been measured with an ac calorimetric technique up to 22 GPa for temperatures in the range 0.3 K < T < 10 K. A thermocouple allowed the temperature...
Calorimetric and transport investigations of CePd2+xGe2-x(x=0 and 0.02) up to 22 Gpa (2002)
The influence of pressure on the magnetically ordered CePd2.02Ge1.98 has been investigated by a combined measurement of electrical resistivity rho(T) and ac calorimetry C(T), for temperatures in the...
Calorimetric and transport investigations of CePd_{2+x}Ge_{2-x} (x=0 and 0.02) up to 22 GPa (2002)
The influence of pressure on the magnetically ordered CePd_{2.02}Ge_{1.98} has been investigated by a combined measurement of electrical resistivity, $\rho(T)$, and ac-calorimetry, C(T), for...
AGARD Flight Test Instrumentation Series. Volume 7. Strain Gauge Measurements on Aircraft (2002)
Kottkamp, E., Wilhelm, H., Kohl, D.
The AGARDograph is the seventh of the AGARD Flight Test Instrumentation Series, and is intended to give the test engineer a comprehensive description of the different aspects of strain and load...
Alternating current calorimetry at very high pressure and low temperature (2002)
The specific heat of CePd2.02Ge1.98 has been measured with an ac calorimetric technique up to 22 GPa for temperatures in the range 0.3 K < T < 10 K. A thermocouple allowed the temperature...
Calorimetric and transport investigations of CePd2+xGe2-x(x=0 and 0.02) up to 22 Gpa (2002)
The influence of pressure on the magnetically ordered CePd2.02Ge1.98 has been investigated by a combined measurement of electrical resistivity rho(T) and ac calorimetry C(T), for temperatures in the...
From spin-Peierls to superconductivity: (TMTTF)2PF6 under high pressure. (2001)
Jaccard,D., Wilhelm,H., Jerome,D., Moser,J., Carcel,C., Fabre,J. M.
From spin-Peierls to superconductivity: (TMTTF)2PF6 under high pressure (2001)
Jaccard,D., Wilhelm,H., Jérome,D., Moser,J., Carcel,C., Fabre,J. M.
Pressure-induced superconductivity in the spin-Peierls compound (TMTTF)2PF6 (2001)
Wilhelm,H., Jaccard,D., Jérome,D., Moser,J., Duprat,R., Bourbonnais,C.
The case for universality of the phase diagram of the Fabre and Bechgaard salts (2001)
Wilhelm,H., Jaccard,D., Duprat,R., Bourbonnais,C., Jérome,D., Moser,J., ...
Pressure-induced residual resistivity anomaly in CeCu5Au (2001)
Wilhelm,H., Raymond,S., Jaccard,D., Stockert,O., Löhneysen,H. V., Rosch,A.
From spin-Peierls to superconductivity: (TMTTF)2PF6 under high pressure. (2001)
Jaccard, D., Wilhelm, H., Jerome, D., Moser, J., Carcel, C., Fabre, J. M.
From spin-Peierls to superconductivity: (TMTTF)2PF6 under high pressure (2001)
Jaccard, D., Wilhelm, H., Jérome, D., Moser, J., Carcel, C., Fabre, J. M.
Pressure-induced superconductivity in the spin-Peierls compound (TMTTF)2PF6 (2001)
Wilhelm, H., Jaccard, D., Jérome, D., Moser, J., Duprat, R., Bourbonnais, C.
The case for universality of the phase diagram of the Fabre and Bechgaard salts (2001)
Wilhelm, H., Jaccard, D., Duprat, R., Bourbonnais, C., Jérome, D., Moser, J., ...
Pressure-induced residual resistivity anomaly in CeCu5Au (2001)
Wilhelm, H., Raymond, S., Jaccard, D., Stockert, O., Löhneysen, H. V., Rosch, A.
Pressure-induced residual resistivity anomaly in CeCu_5Au (2000)
Wilhelm, H., Raymond, S., Jaccard, D., Stockert, O., Loehneysen, H. V., Rosch, A.
The electrical resistivity of the magnetically ordered CeCu_5Au has been investigated under pressure up to 8.5 GPa. In the magnetically ordered region (p
From spin-Peierls to superconductivity: (TMTTF)_2PF_6 under high pressure (2000)
Jaccard, D., Wilhelm, H., Jerome, D., Moser, J., Carcel, C., Fabre, J. M.
The nature of the attractive electron-electron interaction, leading to the formation of Cooper-pairs in unconventional superconductors has still to be fully understood and is subject to intensive...
Calorimetric Investigation of CeRu2Ge2 up to 8 GPa (1999)
Bouquet, F., Wang, Y., Wilhelm, H., Jaccard, D., Junod, A.
We have developed a calorimeter able to give a qualitative picture of the specific heat of a sample under high pressure up to approximately 10 GPa. The principle of ac-calorimetry was adapted to the...
From an antiferromagnet to a heavy-fermion system: CeCu5Au under pressure (1999)
Wilhelm, H., Raymond, S., Jaccard, D., Stockert, O., Loehneysen, H. V.
The electrical resistivity rho(T) of single crystalline CeCu_5Au under pressure was measured in the temperature range 30mK
Transport Properties of Heavy Fermion Compounds (1997)
Jaccard, D., Vargoz, E., Alami-Yadri, K., Wilhelm, H.
A technique for measuring the electrical resistivity and absolute thermopower is presented for pressures up to 30 GPa, temperatures down to 25 mK and magnetic fields up to 10 T. With the examples of...
Zerebrale Funktionsstörungen und Blindheit. Teil 1 (1997)
Lorenz, M., Wilhelm, H., Backmund, B., Prosiegel, M., Meyer, J., ...
Zerebrale Funktionsstörungen und Blindheit. Teil 2 (1997)
Lorenz, M., Wilhelm, H., Backmund, B., Prosiegel, M., Meyer, J., ...
Schaeffel, F, Wilhelm, H, Zrenner, E
1. To study the relationship between accommodation under natural viewing conditions, age and refractive errors, we have measured time courses of accommodation in thirty-nine human subjects aged 5-49...
Schaeffel, F, Wilhelm, H, Zrenner, E
1. To study the relationship between accommodation under natural viewing conditions, age and refractive errors, we have measured time courses of accommodation in thirty-nine human subjects aged 5-49...
Relation between perceived driving disability and scores of vision screening tests
Van Rijn, L J, Wilhelm, H, Emesz, M, Kaper, R, Heine, S, Nitsch, S, ...
Aim: To determine the relation between perceived driving disability and vision screening tests.
Stereotactic fractionated irradiation of optic nerve sheath meningioma: a new treatment alternative
Pitz, S, Becker, G, Schiefer, U, Wilhelm, H, Jeremic, B, Bamberg, M, ...
Background: Primary optic nerve sheath meningioma (ONSM) is a rare but almost invariably blinding tumour when its natural history is observed in a “wait and see” strategy. Surgery has hitherto...
Van Rijn, L J, Nischler, C, Gamer, D, Franssen, L, De Wit, G, Kaper, R, ...
Aim: To evaluate the properties of devices for measuring stray light and glare: the Nyktotest, Mesotest, “conventional” stray light meter and a new, computer implemented version of the stray...
Structure of sodium above 100 GPa by single-crystal x-ray diffraction
McMahon, M. I., Gregoryanz, E., Lundegaard, L. F., Loa, I., Guillaume, C., Nelmes, R. J., ...
At pressures above a megabar (100 GPa), sodium crystallizes in a number of complex crystal structures with unusually low melting temperatures, reaching as low as 300 K at 118 GPa. We have utilized...