Quantitative analysis of quantum phase slips in superconducting Mo76Ge24 nanowires revealed by switching-current statistics
نویسندگان
چکیده
T. Aref,1,2 A. Levchenko,3 V. Vakaryuk,4 and A. Bezryadin1 1Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA 2Low Temperature Laboratory, Aalto University, 00076 Aalto, Finland 3Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA 4Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA (Received 30 January 2012; revised manuscript received 24 May 2012; published 9 July 2012)
منابع مشابه
Probing Quantum Phase Slips in Superconducting Nanowires Modified Using High Bias Voltage Pulses by Thomas Aref
Quantum phase slips (QPS) or the macroscopic quantum tunneling (MQT) of a nanowire’s order parameter through an activation energy barrier have remained the subject of intense debate for many years. They are expected to occur at low enough temperature where thermally activated phase slips (TAPS) have been frozen out in analogy with Josephson junctions where the macroscopic tunneling of phase at ...
متن کاملStochastic and deterministic phase slippage in quasi-one-dimensional superconducting nanowires exposed to microwaves
We study current–voltage (V–I) characteristics of short superconducting nanowires of length ∼ 100 nm exposed to microwave (MW) radiation of frequencies between 2 and 15GHz. The radiation causes a decrease of the average switching current of the wire. This suppression of the switching current is modeled assuming that there is one-to-one correspondence between Little’s phase slips, which are micr...
متن کاملStatistics of localized phase slips in tunable width planar point contacts
The main dissipation mechanism in superconducting nanowires arises from phase slips. Thus far, most of the studies focus on long nanowires where coexisting events appear randomly along the nanowire. In the present work we investigate highly confined phase slips at the contact point of two superconducting leads. Profiting from the high current crowding at this spot, we are able to shrink in-situ...
متن کاملQuasiperiodicity and revivals in dynamics of quantum phase slips in Josephson junction chains and superconducting nanowires
Quantum phase slips in superconducting loops threaded by an external magnetic field provide a coupling between macroscopic quantum states with supercurrents circulating in opposite directions. We analyze the dynamics of the phase slips as a function of the superconducting loop length, from fully coherent dynamics for short loops to dissipative dynamics for the long ones. For intermediate length...
متن کاملSwitching currents limited by single phase slips in one-dimensional superconducting Al nanowires.
An aluminum nanowire switches from superconducting to normal as the current is increased in an upsweep. The switching current (I(s)) averaged over upsweeps approximately follows the depairing critical current (I(c)) but falls below it. Fluctuations in I(s) exhibit three distinct regions of behaviors and are nonmonotonic in temperature: saturation well below the critical temperature T(c), an inc...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2012