TY - JOUR
T1 - Possible observation of Berry phase in Aharonov Bohm rings of InGaAs
AU - Aharony, A.
AU - Entin-Wohlman, O.
AU - Tzarfati, L. H.
AU - Hevroni, R.
AU - Karpovski, M.
AU - Shelukhin, V.
AU - Umansky, V.
AU - Palevski, A.
N1 - Funding Information:
We thank Y. Lyanda-Geller for very useful comments. This work was partially supported by the Israeli Science Foundation (ISF) grant 532/12 and grant 252/11, and by the infrastructure program of Israel Ministry of Science and Technology under contract 3-11173.
Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/5/1
Y1 - 2019/5/1
N2 - Three different methods of experimental mesoscopic physics, namely, weak antilocalization effects, universal conductance fluctuations, and Aharonov-Bohm oscillations, have been used to extract the electron phase-coherence scattering rate in two-dimensional gas of InGaAs/AlInAs heterostructures. The Aharonov-Bohm oscillations reveal strong beating effects, indicating the existence of two similar periodicities of the flux dependencies. As suggested by certain theoretical models, such a behavior might be expected from the so-called Berry phase acquired by electrons with different spin orientations in the presence of strong spin-orbit coupling and Zeeman splitting. In our paper we deduce the experimental values of the dephasing length and try to compare the observed beating pattern with possible scenarios for the appearance of the Berry phase.
AB - Three different methods of experimental mesoscopic physics, namely, weak antilocalization effects, universal conductance fluctuations, and Aharonov-Bohm oscillations, have been used to extract the electron phase-coherence scattering rate in two-dimensional gas of InGaAs/AlInAs heterostructures. The Aharonov-Bohm oscillations reveal strong beating effects, indicating the existence of two similar periodicities of the flux dependencies. As suggested by certain theoretical models, such a behavior might be expected from the so-called Berry phase acquired by electrons with different spin orientations in the presence of strong spin-orbit coupling and Zeeman splitting. In our paper we deduce the experimental values of the dephasing length and try to compare the observed beating pattern with possible scenarios for the appearance of the Berry phase.
UR - http://www.scopus.com/inward/record.url?scp=85063030087&partnerID=8YFLogxK
U2 - 10.1016/j.sse.2019.03.008
DO - 10.1016/j.sse.2019.03.008
M3 - Article
AN - SCOPUS:85063030087
SN - 0038-1101
VL - 155
SP - 117
EP - 122
JO - Solid-State Electronics
JF - Solid-State Electronics
ER -