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Title: Pauli-limited upper critical field of Fe 1 + y Te 1 - x Se x

Abstract

In this work, we investigated the temperature dependence of the upper critical field μ 0 H c 2 ( T ) of Fe 1.02 ( 3 ) Te 0.61 ( 4 ) Se 0.39 ( 4 ) and Fe 1.05 ( 3 ) Te 0.89 ( 2 ) Se 0.11 ( 2 ) single crystals by measuring the magnetotransport properties in stable dc magnetic fields up to 35 T. Both crystals show that μ 0 H c 2 ( T ) in the a b plane and along the c -axis exhibit saturation at low temperatures. The anisotropy of μ 0 H c 2 ( T ) decreases with decreasing temperature, becoming nearly isotropic when the temperature T → 0 . Furthermore, μ 0 H c 2 ( 0 ) deviates from the conventional Werthamer-Helfand-Hohenberg theoretical prediction values for both field directions. Our analysis indicates that the spin-paramagnetic pair-breaking effect is responsible for the temperature-dependent behavior of μ 0 H c 2 ( T ) in both field directions.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Center for Emergent Superconductivity (CES)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1385913
DOE Contract Number:  
AC02-98CH10886
Resource Type:
Journal Article
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 81; Journal Issue: 9; Related Information: CES partners with Brookhaven National Laboratory (BNL); Argonne National Laboratory; University of Illinois, Urbana-Champaign; Los Alamos National Laboratory; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; phonons, thermal conductivity, energy storage (including batteries and capacitors), superconductivity, defects, spin dynamics

Citation Formats

Lei, Hechang, Hu, Rongwei, Choi, E. S., Warren, J. B., and Petrovic, C. Pauli-limited upper critical field of Fe1+yTe1-xSex. United States: N. p., 2010. Web. doi:10.1103/PhysRevB.81.094518.
Lei, Hechang, Hu, Rongwei, Choi, E. S., Warren, J. B., & Petrovic, C. Pauli-limited upper critical field of Fe1+yTe1-xSex. United States. https://doi.org/10.1103/PhysRevB.81.094518
Lei, Hechang, Hu, Rongwei, Choi, E. S., Warren, J. B., and Petrovic, C. Mon . "Pauli-limited upper critical field of Fe1+yTe1-xSex". United States. https://doi.org/10.1103/PhysRevB.81.094518.
@article{osti_1385913,
title = {Pauli-limited upper critical field of Fe1+yTe1-xSex},
author = {Lei, Hechang and Hu, Rongwei and Choi, E. S. and Warren, J. B. and Petrovic, C.},
abstractNote = {In this work, we investigated the temperature dependence of the upper critical field μ 0 H c 2 ( T ) of Fe 1.02 ( 3 ) Te 0.61 ( 4 ) Se 0.39 ( 4 ) and Fe 1.05 ( 3 ) Te 0.89 ( 2 ) Se 0.11 ( 2 ) single crystals by measuring the magnetotransport properties in stable dc magnetic fields up to 35 T. Both crystals show that μ 0 H c 2 ( T ) in the a b plane and along the c -axis exhibit saturation at low temperatures. The anisotropy of μ 0 H c 2 ( T ) decreases with decreasing temperature, becoming nearly isotropic when the temperature T → 0 . Furthermore, μ 0 H c 2 ( 0 ) deviates from the conventional Werthamer-Helfand-Hohenberg theoretical prediction values for both field directions. Our analysis indicates that the spin-paramagnetic pair-breaking effect is responsible for the temperature-dependent behavior of μ 0 H c 2 ( T ) in both field directions.},
doi = {10.1103/PhysRevB.81.094518},
url = {https://www.osti.gov/biblio/1385913}, journal = {Physical Review. B, Condensed Matter and Materials Physics},
issn = {1098-0121},
number = 9,
volume = 81,
place = {United States},
year = {2010},
month = {3}
}

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