Zobrazeno 1 - 10
of 350
pro vyhledávání: '"Shabani J"'
Autor:
Hao, Z., Shaw, T., Hatefipour, M., Strickland, W. M., Elfeky, B. H., Langone, D., Shabani, J., Shankar, S.
Publikováno v:
Appl. Phys. Lett. 124, 254003 (2024)
Nearly quantum limited Josephson parametric amplifiers (JPAs) are essential components in superconducting quantum circuits. However, higher order nonlinearities of the Josephson cosine potential are known to cause gain compression, therefore limiting
Externí odkaz:
http://arxiv.org/abs/2402.11085
We explore vortex dynamics in a two-dimensional Josephson junction array of micron-size superconducting islands fabricated from an epitaxial Al/InAs superconductor-semiconductor heterostructure, with a global top gate controlling Josephson coupling a
Externí odkaz:
http://arxiv.org/abs/2212.08651
We investigate the Berezinskii-Kosterlitz-Thouless (BKT) transition in a semiconductor-superconductor two-dimensional Josephson junction array. Tuned by an electrostatic top gate, the system exhibits separate superconducting (S), anomalous metal (M*)
Externí odkaz:
http://arxiv.org/abs/2210.00318
Autor:
Phan, D., Falthansl-Scheinecker, P., Mishra, U., Strickland, W. M., Langone, D., Shabani, J., Higginbotham, A. P.
We have built a parametric amplifier with a Josephson field effect transistor (JoFET) as the active element. The device's resonant frequency is field-effect tunable over a range of 2 GHz. The JoFET amplifier has 20 dB of gain, 4 MHz of instantaneous
Externí odkaz:
http://arxiv.org/abs/2206.05746
Autor:
Phan, D., Senior, J., Ghazaryan, A., Hatefipour, M., Strickland, W. M., Shabani, J., Serbyn, M., Higginbotham, A. P.
Superconductor-semiconductor hybrid devices are at the heart of several proposed approaches to quantum information processing, but their basic properties remain to be understood. We embed a two-dimensional Al-InAs hybrid system in a resonant microwav
Externí odkaz:
http://arxiv.org/abs/2107.03695
Autor:
Sardashti, K., Nguyen, T., Hatefipour, M., Sarney, W. L., Yuan, J., Mayer, W., Kisslinger, K., Shabani, J.
Publikováno v:
Appl. Phys. Lett. 118, 073102 (2021)
Hyperdoping with gallium (Ga) has been established as a route to observe superconductivity in silicon (Si). The relatively large critical temperatures (T$_{\rm c}$) and magnetic fields (B$_{\rm c}$) make this phase attractive for cryogenic circuit ap
Externí odkaz:
http://arxiv.org/abs/2012.04748
Autor:
Bøttcher, C. G. L., Nichele, F., Kjaergaard, M., Suominen, H. J., Shabani, J., Palmstrøm, C. J., Marcus, C. M.
Publikováno v:
Nature Physics 14, 1138 (2018)
The superconductor-insulator transition in two dimensions has been widely investigated as a paradigmatic quantum phase transition. The topic remains controversial, however, because many experiments exhibit a metallic regime with saturating low-temper
Externí odkaz:
http://arxiv.org/abs/1711.01451
Autor:
Suominen, H. J., Danon, J., Kjaergaard, M., Flensberg, K., Shabani, J., Palmstrøm, C. J., Nichele, F., Marcus, C. M.
Publikováno v:
Phys. Rev. B 95, 035307 (2017)
We investigate patterns of critical current as a function of perpendicular and in-plane magnetic fields in superconductor-semiconductor-superconductor (SNS) junctions based on InAs/InGaAs heterostructures with an epitaxial Al layer. This material sys
Externí odkaz:
http://arxiv.org/abs/1611.00190
Autor:
Kjaergaard, M., Suominen, H. J., Nowak, M. P., Akhmerov, A. R., Shabani, J., Palmstrøm, C. J., Nichele, F., Marcus, C. M.
Publikováno v:
Phys. Rev. Applied 7, 034029 (2017)
Measurement of multiple Andreev reflection (MAR) in a Josephson junction made from an InAs heterostructure with epitaxial aluminum is used to quantify the highly transparent semiconductor-superconductor interface, indicating near-unity transmission.
Externí odkaz:
http://arxiv.org/abs/1607.04164
Autor:
Kjaergaard, M., Nichele, F., Suominen, H. J., Nowak, M. P., Wimmer, M., Akhmerov, A. R., Folk, J. A., Flensberg, K., Shabani, J., Palmstrom, C. J., Marcus, C. M.
Publikováno v:
Nat. Commun. 7, 12841 (2016)
The prospect of coupling a two-dimensional (2D) semiconductor heterostructure to a superconductor opens new research and technology opportunities, including fundamental problems in mesoscopic superconductivity, scalable superconducting electronics, a
Externí odkaz:
http://arxiv.org/abs/1603.01852