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Title: A Triplet Resonance in Superconducting Fe 1.03Se 0.4Te 0.6

Abstract

From heavy fermion compounds and cuprates to iron pnictides and chalcogenides, a spin resonance at $$\hbar$$Ω0 ∝ k BT c is a staple of nearly magnetic superconductors. Possible explanations include a two-particle bound state or loss of magnon damping in the superconducting state. While both scenarios suggest a central role for magnetic fluctuations, distinguishing them is important to identify the right theoretical framework to understand these types of unconventional superconductors. Using an inelastic neutron scattering technique, we show that the spin resonance in the optimally doped Fe 1.03Se 0.4Te 0.6 superconductor splits into three peaks in a high magnetic field, a signature of a two-particle S = 1 triplet bound state.

Authors:
 [1]; ORCiD logo [2]; ORCiD logo [2];  [3];  [4];  [5];  [6];  [1]
  1. Renmin Univ. of China, Beijing (China). Dept. of Physics
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Scattering Division
  3. Helmholtz-Zentrum Berlin für Materialen und Energy, Berlin (Germany)
  4. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Neutron Research; Univ. of Maryland, College Park, MD (United States). Dept. of Materials Science and Engineering
  5. Univ. of Arkansas, Fayetteville, AR (United States). Dept. of Physics
  6. Pennsylvania State Univ., University Park, PA (United States). Dept of Physics
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF); National Natural Science Foundation of China (NNSFC)
OSTI Identifier:
1484980
Grant/Contract Number:  
AC05-00OR22725; FG02-07ER46358; 2012CB921700; 2011CBA00112; 11034012; 11190024; DMR-0645305
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Chinese Physics Letters
Additional Journal Information:
Journal Volume: 35; Journal Issue: 12; Journal ID: ISSN 0256-307X
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Liu, Juanjuan, Savici, Andrei T., Granroth, Garrett E., Habicht, Klaus, Qiu, Y., Hu, Jin, Mao, Z Q., and Bao, Wei. A Triplet Resonance in Superconducting Fe1.03Se0.4Te0.6. United States: N. p., 2018. Web. doi:10.1088/0256-307X/35/12/127401.
Liu, Juanjuan, Savici, Andrei T., Granroth, Garrett E., Habicht, Klaus, Qiu, Y., Hu, Jin, Mao, Z Q., & Bao, Wei. A Triplet Resonance in Superconducting Fe1.03Se0.4Te0.6. United States. doi:10.1088/0256-307X/35/12/127401.
Liu, Juanjuan, Savici, Andrei T., Granroth, Garrett E., Habicht, Klaus, Qiu, Y., Hu, Jin, Mao, Z Q., and Bao, Wei. Sat . "A Triplet Resonance in Superconducting Fe1.03Se0.4Te0.6". United States. doi:10.1088/0256-307X/35/12/127401.
@article{osti_1484980,
title = {A Triplet Resonance in Superconducting Fe1.03Se0.4Te0.6},
author = {Liu, Juanjuan and Savici, Andrei T. and Granroth, Garrett E. and Habicht, Klaus and Qiu, Y. and Hu, Jin and Mao, Z Q. and Bao, Wei},
abstractNote = {From heavy fermion compounds and cuprates to iron pnictides and chalcogenides, a spin resonance at $\hbar$Ω0 ∝ kBTc is a staple of nearly magnetic superconductors. Possible explanations include a two-particle bound state or loss of magnon damping in the superconducting state. While both scenarios suggest a central role for magnetic fluctuations, distinguishing them is important to identify the right theoretical framework to understand these types of unconventional superconductors. Using an inelastic neutron scattering technique, we show that the spin resonance in the optimally doped Fe1.03Se0.4Te0.6 superconductor splits into three peaks in a high magnetic field, a signature of a two-particle S = 1 triplet bound state.},
doi = {10.1088/0256-307X/35/12/127401},
journal = {Chinese Physics Letters},
issn = {0256-307X},
number = 12,
volume = 35,
place = {United States},
year = {2018},
month = {12}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on December 1, 2019
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