Zobrazeno 1 - 10
of 220
pro vyhledávání: '"Ho, L. H."'
The hysteresis observed in the magnetoresistance of bilayer 2D systems in the quantum Hall regime is generally attributed to the long time constant for charge transfer between the 2D systems due to the very low conductivity of the quantum Hall bulk s
Externí odkaz:
http://arxiv.org/abs/1009.5468
We discuss the development of a sensitive electrometer that utilizes a two-dimensional electron gas (2DEG) in the quantum Hall regime. As a demonstration, we measure the evolution of the Landau levels in a second, nearby 2DEG as the applied perpendic
Externí odkaz:
http://arxiv.org/abs/1003.5017
Autor:
Chen, J. C. H., Klochan, O., Micolich, A. P., Hamilton, A. R., Martin, T. P., Ho, L. H., Zuelicke, U., Reuter, D., Wieck, A. D.
We study the Zeeman spin-splitting in hole quantum wires oriented along the $[011]$ and $[01\bar{1}]$ crystallographic axes of a high mobility undoped (100)-oriented AlGaAs/GaAs heterostructure. Our data shows that the spin-splitting can be switched
Externí odkaz:
http://arxiv.org/abs/0909.5295
The use of a nearby metallic ground-plane to limit the range of the Coulomb interactions between carriers is a useful approach in studying the physics of two-dimensional (2D) systems. This approach has been used to study Wigner crystallization of ele
Externí odkaz:
http://arxiv.org/abs/0904.3786
We study the Zeeman splitting in induced ballistic 1D quantum wires aligned along the [233] and [011] axes of a high mobility (311)A undoped heterostructure. Our data shows that the g-factor anisotropy for magnetic fields applied along the high symme
Externí odkaz:
http://arxiv.org/abs/0809.0969
Autor:
Ho, L. H., Clarke, W. R., Micolich, A. P., Danneau, R., Klochan, O., Simmons, M. Y., Hamilton, A. R., Pepper, M., Ritchie, D. A.
We have developed a technique utilizing a double quantum well heterostructure that allows us to study the effect of a nearby ground-plane on the metallic behavior in a GaAs two-dimensional hole system (2DHS) in a single sample and measurement cool-do
Externí odkaz:
http://arxiv.org/abs/0804.4049
Autor:
Danneau, R., Klochan, O., Clarke, W. R., Ho, L. H., Micolich, A. P., Simmons, M. Y., Hamilton, A. R., Pepper, M., Ritchie, D. A.
We study the anomalous conductance plateau around $G = 0.7(2e^{2}/h)$ and the zero-bias anomaly in ballistic hole quantum wires with respect to in-plane magnetic fields applied parallel $B_{\parallel}$ and perpendicular $B_{\perp}$ to the quantum wir
Externí odkaz:
http://arxiv.org/abs/cond-mat/0702210
Autor:
Klochan, O., Clarke, W. R., Danneau, R., Micolich, A. P., Ho, L. H., Hamilton, A. R., Muraki, K., Hirayama, Y.
We have fabricated and studied a ballistic one-dimensional p-type quantum wire using an undoped AlGaAs/GaAs heterostructure. The absence of modulation doping eliminates remote ionized impurity scattering and allows high mobilities to be achieved over
Externí odkaz:
http://arxiv.org/abs/cond-mat/0607509
Autor:
Danneau, R., Klochan, O., Clarke, W. R., Ho, L. H., Micolich, A. P., Simmons, M. Y., Hamilton, A. R., Pepper, M., Ritchie, D. A., Zuelicke, U.
We have studied the effect of an in-plane magnetic field B on a one-dimensional hole system in the ballistic regime created by surface gate confinement. We observed clearly the lifting of the spin degeneracy due to the Zeeman effect on the one dimens
Externí odkaz:
http://arxiv.org/abs/cond-mat/0607357
Autor:
Danneau, R., Klochan, O., Clarke, W. R., Ho, L. H., Micolich, A. P., Simmons, M. Y., Hamilton, A. R., Pepper, M., Ritchie, D. A., Zuelicke, U.
Publikováno v:
Phys. Rev. Lett. 97, 026403 (2006)
We have studied the Zeeman splitting in ballistic hole quantum wires formed in a (311)A quantum well by surface gate confinement. Transport measurements clearly show lifting of the spin degeneracy and crossings of the subbands when an in-plane magnet
Externí odkaz:
http://arxiv.org/abs/cond-mat/0607355