Zobrazeno 1 - 10
of 22
pro vyhledávání: '"D. R. Luhman"'
Autor:
D. R. Luhman, Laura Wadleigh
Publikováno v:
Journal of Low Temperature Physics. 177:178-192
Rough two-dimensional substrates, such as thermally deposited \(\hbox {CaF}_2\), have been shown to modify the experimental signatures of the superfluid transition in adsorbed thin helium films. Previous experiments have investigated a series of incr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f2db27674293f313c2bd7c69b2b7fa73
https://doi.org/10.1007/s10909-014-1200-y
https://doi.org/10.1007/s10909-014-1200-y
Publikováno v:
Surface Science. 603:3249-3253
The growth of thermally deposited CaF 2 films was studied using three different substrates for deposition: glass, gold and silicon. Each substrate was chosen because of its different topography and used to determine the effect of substrate roughness
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::454eee3816e9310b881a283b4079cd48
https://doi.org/10.1016/j.susc.2009.09.015
https://doi.org/10.1016/j.susc.2009.09.015
Publikováno v:
International Journal of Modern Physics B. 23:2808-2812
We report the results of tilted magnetic field experiments on three high quality wide GaAs quantum wells, with particular emphasis on the N ≥ 1 Landau levels. With an increasing component of in-plane magnetic field, B∥, we observe reentrant behav
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d2821b9a749e555ac7e2fee024a57114
https://doi.org/10.1142/s0217979209062384
https://doi.org/10.1142/s0217979209062384
Autor:
D. R. Luhman, Robert B. Hallock
Publikováno v:
Journal of Low Temperature Physics. 148:541-545
We report measurements of pulsed third sound in the presence of a uniform superfluid flow at T=0.89 K. The superfluid flow is created using a heater technique. For increasingly large values of power dissipated in the heater used to create the flow, t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3a2fd0a448f226421ce2b91d4d829d36
https://doi.org/10.1007/s10909-007-9464-0
https://doi.org/10.1007/s10909-007-9464-0
Autor:
Robert B. Hallock, D. R. Luhman
Publikováno v:
Journal of Low Temperature Physics. 148:535-539
The results of measurements of ordinary third sound attenuation at T=1.35 K are reported. The attenuation is measured by using a continuous wave technique for frequencies up to 40 kHz. We find that for helium film thicknesses in the regime 5.09≤d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::27f4fb247e324b529c8e62ecabbf75fb
https://doi.org/10.1007/s10909-007-9467-x
https://doi.org/10.1007/s10909-007-9467-x
Autor:
D. R. Luhman, Robert B. Hallock
Publikováno v:
Journal of Low Temperature Physics. 138:319-324
We present the results of experiments that utilize deposited CaF2 of various nominal thickness, ranging from 50 nm to 520 nm, as a substrate for pulsed third sound propagation with a tunable index of refraction, n. At low 4He film thicknesses on samp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4f64bf7e3f3ca98b8501dc95bfb1b2a4
https://doi.org/10.1007/s10909-005-1571-1
https://doi.org/10.1007/s10909-005-1571-1
Autor:
D. R. Luhman, Robert B. Hallock
Publikováno v:
Journal of Low Temperature Physics. 134:245-250
We present resugts from experiments utilizing third sound and atomic force microscopy (AFM) that are designed to test the reproducibility of the surface roughness obtained by CaF2 thermal deposition onto borosilicate glass substrates. Third sound spe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ccf26fe266bb5db249515b381892f00d
https://doi.org/10.1023/b:jolt.0000012562.74005.67
https://doi.org/10.1023/b:jolt.0000012562.74005.67
Publikováno v:
Physica E: Low-dimensional Systems and Nanostructures. 40:1504-1506
We report on magneto-transport measurements of a systematic set of five GaAs/AlGaAs quantum wells with well widths ranging from 7.9 to 33.0 nm. We find that as L is decreased into the regime where the zero-field mobility is limited due to surface rou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::13db56de5a18f27a0ef2fe78202321ed
https://doi.org/10.1016/j.physe.2007.09.069
https://doi.org/10.1016/j.physe.2007.09.069
Publikováno v:
Physica E: Low-dimensional Systems and Nanostructures. 40:1059-1061
Due to the current interest in quantum Hall states described by the Moore-Read or Pfaffian wavefunction, we have recently begun experiments involving a series of high-quality wide GaAs quantum well in an effort to search for new Pfaffian states. Here
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a45bb69c552dd58fff967041d0e3fd1a
https://doi.org/10.1016/j.physe.2007.10.066
https://doi.org/10.1016/j.physe.2007.10.066
Publikováno v:
Physical Review Letters. 105
We report the observation of a reentrant quantum Hall effect in the lowest Landau level between filling factors of $2/3$ and $3/5$ in a ${\mathrm{Al}}_{x}{\mathrm{Ga}}_{1\ensuremath{-}x}\mathrm{As}/{\mathrm{Al}}_{0.32}{\mathrm{Ga}}_{0.68}\mathrm{As}$
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::26a01e01cfc95daa25781d72f5bc9399
https://doi.org/10.1103/physrevlett.105.076803
https://doi.org/10.1103/physrevlett.105.076803