Effective g factor of lowdensity twodimensional holes in a Ge quantum well
Abstract
Here we report the measurements of the effective g factor of lowdensity twodimensional holes in a Ge quantum well. Using the temperature dependence of the Shubnikovde Haas oscillations, we extract the effective g factor in a magnetic field perpendicular to the sample surface. Very large values of the effective g factor, ranging from ~13 to ~28, are observed in the density range of 1.4×10 ^{10} cm ^{2}– 1.4×10 ^{11} cm ^{2}. When the magnetic field is oriented parallel to the sample surface, the effective g factor is obtained from a protrusion in the magnetoresistance data that signify full spin polarization. In the latter orientation, a small effective g factor, ~1.31.4, is measured in the density range of 1.5×10 ^{10} cm ^{2}–2×10 ^{10} cm ^{2}. Finally, this very strong anisotropy is consistent with theoretical predictions and previous measurements in other 2D hole systems, such as InGaAs and GaSb.
 Authors:
 Sandia National Lab. (SNLNM), Albuquerque, NM (United States)
 Sandia National Lab. (SNLNM), Albuquerque, NM (United States); Sandia National Lab. (SNLNM), Albuquerque, NM (United States). Center for Integrated Nanotechnologies
 National Taiwan Univ., Taipei (Taiwan). Dept. of Electrical Engineering and Graduate Inst. of Electronic Engineering; National Nano Device Lab., Hsinchu (Taiwan)
 Publication Date:
 Research Org.:
 Sandia National Lab. (SNLNM), Albuquerque, NM (United States)
 Sponsoring Org.:
 USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC22); National Science Foundation (NSF); Ministry of Science and Technology
 OSTI Identifier:
 1398779
 Alternate Identifier(s):
 OSTI ID: 1380047
 Report Number(s):
 SAND20179871J
Journal ID: ISSN 00036951; 656977
 Grant/Contract Number:
 AC0494AL85000; NA0003525
 Resource Type:
 Journal Article: Accepted Manuscript
 Journal Name:
 Applied Physics Letters
 Additional Journal Information:
 Journal Volume: 111; Journal Issue: 10; Journal ID: ISSN 00036951
 Publisher:
 American Institute of Physics (AIP)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; G factor; Quantum wells; Magnetic ordering; Semiconductors; Spintronics
Citation Formats
Lu, T. M., Harris, C. T., Huang, S. H., Chuang, Y., Li, J. Y., and Liu, C. W.. Effective g factor of lowdensity twodimensional holes in a Ge quantum well. United States: N. p., 2017.
Web. doi:10.1063/1.4990569.
Lu, T. M., Harris, C. T., Huang, S. H., Chuang, Y., Li, J. Y., & Liu, C. W.. Effective g factor of lowdensity twodimensional holes in a Ge quantum well. United States. doi:10.1063/1.4990569.
Lu, T. M., Harris, C. T., Huang, S. H., Chuang, Y., Li, J. Y., and Liu, C. W.. Mon .
"Effective g factor of lowdensity twodimensional holes in a Ge quantum well". United States.
doi:10.1063/1.4990569.
@article{osti_1398779,
title = {Effective g factor of lowdensity twodimensional holes in a Ge quantum well},
author = {Lu, T. M. and Harris, C. T. and Huang, S. H. and Chuang, Y. and Li, J. Y. and Liu, C. W.},
abstractNote = {Here we report the measurements of the effective g factor of lowdensity twodimensional holes in a Ge quantum well. Using the temperature dependence of the Shubnikovde Haas oscillations, we extract the effective g factor in a magnetic field perpendicular to the sample surface. Very large values of the effective g factor, ranging from ~13 to ~28, are observed in the density range of 1.4×1010 cm2– 1.4×1011 cm2. When the magnetic field is oriented parallel to the sample surface, the effective g factor is obtained from a protrusion in the magnetoresistance data that signify full spin polarization. In the latter orientation, a small effective g factor, ~1.31.4, is measured in the density range of 1.5×1010 cm2–2×1010 cm2. Finally, this very strong anisotropy is consistent with theoretical predictions and previous measurements in other 2D hole systems, such as InGaAs and GaSb.},
doi = {10.1063/1.4990569},
journal = {Applied Physics Letters},
number = 10,
volume = 111,
place = {United States},
year = {Mon Sep 04 00:00:00 EDT 2017},
month = {Mon Sep 04 00:00:00 EDT 2017}
}

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