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Title: Thermoelectric transport of the half-filled lowest Landau level in a p -type Ge/SiGe heterostructure

Abstract

In this work, we investigate the thermoelectric transport properties of the half-filled lowest Landau level v = 1 / 2 in a gated two-dimensional hole system in a strained Ge/SiGe heterostructure. The electron-diffusion dominated regime is achieved below 600 mK, where the diffusion thermopower S x x d at v = 1 / 2 shows a linear temperature dependence. In contrast, the diffusion-dominated Nernst signal S x y d of v = 1 / 2 is found to approach zero, which is independent of the measurement configuration (sweeping magnetic field at a fixed hole density or sweeping the density by a gate at a fixed magnetic field).

Authors:
 [1];  [2];  [2];  [3];  [3];  [3];  [3];  [1]
  1. Rice Univ., Houston, TX (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Center for Integrated Nanotechnologies (CINT)
  3. National Taiwan Univ., Taipei, Taiwan (Republic of China); National Nano Device Lab., Hsinchu, Taiwan (Republic of China)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF); Welch Foundation; USDOE National Nuclear Security Administration (NNSA); Ministry of Science and Technology (Taiwan); Ministry of Education (Taiwan)
OSTI Identifier:
1601273
Alternate Identifier(s):
OSTI ID: 1599513
Report Number(s):
SAND-2020-1875J
Journal ID: ISSN 2469-9950; PRBMDO; 683891
Grant/Contract Number:  
AC04-94AL85000; DMR-1508644; C-1682; NA0003525; 106-2112-M-002-009-; 107-2218-E-002-044; 107-2622-8-002-018; NTU-CC-108L891701; NTU-07L7818; NTU-107L891702
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 101; Journal Issue: 7; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Liu, Xiaoxue, Lu, Tzu-Ming, Harris, Charles Thomas, Lu, Fang-Liang, Liu, Chia-You, Li, Jiun-Yun, Liu, Chee Wee, and Du, Rui-Rui. Thermoelectric transport of the half-filled lowest Landau level in a p -type Ge/SiGe heterostructure. United States: N. p., 2020. Web. doi:10.1103/PhysRevB.101.075304.
Liu, Xiaoxue, Lu, Tzu-Ming, Harris, Charles Thomas, Lu, Fang-Liang, Liu, Chia-You, Li, Jiun-Yun, Liu, Chee Wee, & Du, Rui-Rui. Thermoelectric transport of the half-filled lowest Landau level in a p -type Ge/SiGe heterostructure. United States. doi:10.1103/PhysRevB.101.075304.
Liu, Xiaoxue, Lu, Tzu-Ming, Harris, Charles Thomas, Lu, Fang-Liang, Liu, Chia-You, Li, Jiun-Yun, Liu, Chee Wee, and Du, Rui-Rui. Wed . "Thermoelectric transport of the half-filled lowest Landau level in a p -type Ge/SiGe heterostructure". United States. doi:10.1103/PhysRevB.101.075304.
@article{osti_1601273,
title = {Thermoelectric transport of the half-filled lowest Landau level in a p -type Ge/SiGe heterostructure},
author = {Liu, Xiaoxue and Lu, Tzu-Ming and Harris, Charles Thomas and Lu, Fang-Liang and Liu, Chia-You and Li, Jiun-Yun and Liu, Chee Wee and Du, Rui-Rui},
abstractNote = {In this work, we investigate the thermoelectric transport properties of the half-filled lowest Landau level v=1/2 in a gated two-dimensional hole system in a strained Ge/SiGe heterostructure. The electron-diffusion dominated regime is achieved below 600 mK, where the diffusion thermopower Sxxd at v=1/2 shows a linear temperature dependence. In contrast, the diffusion-dominated Nernst signal Sxyd of v=1/2 is found to approach zero, which is independent of the measurement configuration (sweeping magnetic field at a fixed hole density or sweeping the density by a gate at a fixed magnetic field).},
doi = {10.1103/PhysRevB.101.075304},
journal = {Physical Review B},
number = 7,
volume = 101,
place = {United States},
year = {2020},
month = {2}
}

Journal Article:
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