Published March 2017 | Version v1
Journal article Metadata-only

High-temperature superconductivity and lattice relaxation in lithium-deposited FeSe on SrTiO3

Creators

  • 1. Tohoku University, Department of Physics, Sendai, Miyagi (Japan)
  • 2. Tohoku University, Advanced Institute for Materials Research, Sendai, Miyagi (Japan)

Description

We studied the effect of strain, interface, and electron doping on the superconductivity in thin FeSe film on SrTiO3 by angle-resolved photoemission spectroscopy (ARPES). We observed the superconductivity with Tc as high as 43 K in a lithium (Li) deposited heavily electron-doped multilayer FeSe film. We found a significant relaxation of tensile strain at the surface in contrast to the case of potassium (K) deposition, although the high-Tc superconductivity is commonly observed in both cases. We discuss the interplay among carrier doping, tensile strain, and high-Tc superconductivity by comparing ARPES results on Li- and K-deposited FeSe films. (author)

Availability note (English)

Available from http://dx.doi.org/10.7566/JPSJ.86.033706

Additional details

Identifiers

DOI
10.7566/JPSJ.86.033706;

Publishing Information

Journal Title
Journal of the Physical Society of Japan (Online)
Journal Volume
86
Journal Issue
3
Journal Page Range
p. 033706.1-033706.4
ISSN
1347-4073

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
48075659
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
ELECTRON-PHONON COUPLING; ELECTRONS; FERMI LEVEL; FILMS; HIGH-TC SUPERCONDUCTORS; IRON SELENIDES; LITHIUM; MOLECULAR BEAM EPITAXY; PHOTOELECTRON SPECTROSCOPY; SPIN-LATTICE RELAXATION; STRAINS; STRONTIUM TITANATES; SUPERCONDUCTIVITY; VACANCIES; VACUUM STATES
Descriptors DEC
ALKALI METALS; ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; COUPLING; CRYSTAL DEFECTS; CRYSTAL GROWTH METHODS; CRYSTAL STRUCTURE; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; ELECTRON SPECTROSCOPY; ELEMENTARY PARTICLES; ELEMENTS; ENERGY LEVELS; EPITAXY; FERMIONS; IRON COMPOUNDS; LEPTONS; METALS; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; POINT DEFECTS; RELAXATION; SELENIDES; SELENIUM COMPOUNDS; SPECTROSCOPY; STRONTIUM COMPOUNDS; SUPERCONDUCTORS; TITANATES; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; TYPE-II SUPERCONDUCTORS

Optional Information

Notes
22 refs., 3 figs.