Lattice dynamics of ultrathin FeSe films on SrTiO3

Zhang, Shuyuan; Guan, Jiaqi; Wang, Yan; Berlijn, Tom; Johnston, Steve; Jia, Xun; Liu, Bing; Zhu, Qing; An, Qichang; Xue, Siwei; Cao, Yanwei; Yang, Fang; Wang, Weihua; Zhang, Jiandi; Plummer, E. W.; Zhu, Xuetao; Guo, Jiandong

doi:10.1103/PhysRevB.97.035408

Lattice dynamics of ultrathin FeSe films on ${SrTiO}_{3}$

Journal Article · Mon Jan 08 00:00:00 EST 2018 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.97.035408· OSTI ID:1484097

Zhang, Shuyuan ^[1]; Guan, Jiaqi ^[1]; Wang, Yan ^[2]; Berlijn, Tom ^[3]; Johnston, Steve ^[2]; Jia, Xun ^[1]; Liu, Bing ^[1]; Zhu, Qing ^[1]; An, Qichang ^[1]; Xue, Siwei ^[1]; Cao, Yanwei ^[4]; Yang, Fang ^[4]; Wang, Weihua ^[4]; Zhang, Jiandi ^[5]; Plummer, E. W. ^[5]; Zhu, Xuetao ^[1]; Guo, Jiandong ^[6]

Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Lab. for Condensed Matter Physics. Inst. of Physics; Univ. of Chinese Academy of Sciences, Beijing (China). School of Physical Sciences
Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences. Computational Sciences and Engineering Division
Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Lab. for Condensed Matter Physics. Inst. of Physics
Louisiana State Univ., Baton Rouge, LA (United States). Dept. of Physics and Astronomy
Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Lab. for Condensed Matter Physics. Inst. of Physics; Univ. of Chinese Academy of Sciences, Beijing (China). School of Physical Sciences; Collaborative Innovation Center of Quantum Matter, Beijing (China)

Charge transfer and electron-phonon coupling (EPC) are proposed to be two important constituents associated with enhanced superconductivity in the single unit cell FeSe films on oxide surfaces. Using high-resolution electron energy loss spectroscopy combined with first-principles calculations, we have explored here the lattice dynamics of ultrathin FeSe films grown on $${\mathrm{SrTiO}}_{3}$$. We show that, despite the significant effect from the substrate on the electronic structure and superconductivity of the system, the FeSe phonons in the films are unaffected. The energy dispersion and linewidth associated with the Fe- and Se-derived vibrational modes are thickness and temperature independent. Theoretical calculations indicate the crucial role of antiferromagnetic correlation in FeSe to reproduce the experimental phonon dispersion. Importantly, the only detectable change due to the growth of FeSe films is the broadening of the Fuchs-Kliewer (F-K) phonons associated with the lattice vibrations of $${\mathrm{SrTiO}}_{3}$$(001) substrate. Finally, if EPC plays any role in the enhancement of film superconductivity, it must be the interfacial coupling between the electrons in FeSe film and the F-K phonons from substrate rather than the phonons of FeSe.

View Accepted Manuscript (DOE)

Research Organization:: Chinese Academy of Sciences (CAS), Beijing (China); Louisiana State Univ., Baton Rouge, LA (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Chinese Academy of Sciences, Beijing (China); Univ. of Tennessee, Knoxville, TN (United States)

Sponsoring Organization:: National Key R&D Program of China; National Natural Science Foundation of China (NSFC); National Science Foundation (NSF) (United States); USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); Youth Innovation Promotion Association of Chinese Academy of Sciences (CAS)

Grant/Contract Number:: AC02-05CH11231; AC05-00OR22725

OSTI ID:: 1484097

Alternate ID(s):: OSTI ID: 1416071

Journal Information:: Physical Review B, Journal Name: Physical Review B Journal Issue: 3 Vol. 97; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

References (70)

Interferenz von Röntgenstrahlen und Wärmebewegung Debye, P. Annalen der Physik, Vol. 348, Issue 1 https://doi.org/10.1002/andp.19133480105	journal	January 1913
LEED surface debye temperature of Cu (100) Reid, R. J. Physica Status Solidi (a), Vol. 2, Issue 2 https://doi.org/10.1002/pssa.19700020243	journal	June 1970
Zur Frage der Einwirkung der W�rmebewegung auf die Interferenz von R�ntgenstrahlen Waller, Ivar Zeitschrift f�r Physik, Vol. 17, Issue 1 https://doi.org/10.1007/BF01328696	journal	December 1923
Surface Debye-Waller factors for Cr(100) and Mo(100) Tabor, D.; Wilson, J. M.; Bastow, T. J. Surface Science, Vol. 26, Issue 2 https://doi.org/10.1016/0039-6028(71)90009-4	journal	July 1971
Pseudopotentials for high-throughput DFT calculations Garrity, Kevin F.; Bennett, Joseph W.; Rabe, Karin M. Computational Materials Science, Vol. 81 https://doi.org/10.1016/j.commatsci.2013.08.053	journal	January 2014
First principles phonon calculations in materials science Togo, Atsushi; Tanaka, Isao Scripta Materialia, Vol. 108 https://doi.org/10.1016/j.scriptamat.2015.07.021	journal	November 2015
Interfacial mode coupling as the origin of the enhancement of Tc in FeSe films on SrTiO3 Lee, J. J.; Schmitt, F. T.; Moore, R. G. Nature, Vol. 515, Issue 7526 https://doi.org/10.1038/nature13894	journal	November 2014
Common electronic origin of superconductivity in (Li,Fe)OHFeSe bulk superconductor and single-layer FeSe/SrTiO3 films Zhao, Lin; Liang, Aiji; Yuan, Dongna Nature Communications, Vol. 7, Issue 1 https://doi.org/10.1038/ncomms10608	journal	February 2016
Anomalous correlation effects and unique phase diagram of electron-doped FeSe revealed by photoemission spectroscopy Wen, C. H. P.; Xu, H. C.; Chen, C. Nature Communications, Vol. 7, Issue 1 https://doi.org/10.1038/ncomms10840	journal	March 2016
Superconductivity below 20 K in heavily electron-doped surface layer of FeSe bulk crystal Seo, J. J.; Kim, B. Y.; Kim, B. S. Nature Communications, Vol. 7, Issue 1 https://doi.org/10.1038/ncomms11116	journal	April 2016
Magnetic ground state of FeSe Wang, Qisi; Shen, Yao; Pan, Bingying Nature Communications, Vol. 7, Issue 1 https://doi.org/10.1038/ncomms12182	journal	July 2016
Electronic origin of high-temperature superconductivity in single-layer FeSe superconductor Liu, Defa; Zhang, Wenhao; Mou, Daixiang Nature Communications, Vol. 3, Issue 1 https://doi.org/10.1038/ncomms1946	journal	January 2012
Tuning the band structure and superconductivity in single-layer FeSe by interface engineering Peng, R.; Xu, H. C.; Tan, S. Y. Nature Communications, Vol. 5, Issue 1 https://doi.org/10.1038/ncomms6044	journal	September 2014
Phase diagram and electronic indication of high-temperature superconductivity at 65 K in single-layer FeSe films He, Shaolong; He, Junfeng; Zhang, Wenhao Nature Materials, Vol. 12, Issue 7 https://doi.org/10.1038/nmat3648	journal	May 2013
Interface-induced superconductivity and strain-dependent spin density waves in FeSe/SrTiO3 thin films Tan, Shiyong; Zhang, Yan; Xia, Miao Nature Materials, Vol. 12, Issue 7 https://doi.org/10.1038/nmat3654	journal	May 2013
Superconductivity above 100 K in single-layer FeSe films on doped SrTiO3 Ge, Jian-Feng; Liu, Zhi-Long; Liu, Canhua Nature Materials, Vol. 14, Issue 3 https://doi.org/10.1038/nmat4153	journal	November 2014
Coexistence of superconductivity and antiferromagnetism in (Li0.8Fe0.2)OHFeSe Lu, X. F.; Wang, N. Z.; Wu, H. Nature Materials, Vol. 14, Issue 3 https://doi.org/10.1038/nmat4155	journal	December 2014
High-temperature superconductivity in potassium-coated multilayer FeSe thin films Miyata, Y.; Nakayama, K.; Sugawara, K. Nature Materials, Vol. 14, Issue 8 https://doi.org/10.1038/nmat4302	journal	June 2015
Strong interplay between stripe spin fluctuations, nematicity and superconductivity in FeSe Wang, Qisi; Shen, Yao; Pan, Bingying Nature Materials, Vol. 15, Issue 2 https://doi.org/10.1038/nmat4492	journal	December 2015
A new frontier for superconductivity Bozovic, Ivan; Ahn, Charles Nature Physics, Vol. 10, Issue 12 https://doi.org/10.1038/nphys3177	journal	November 2014
Electric-field-induced superconductivity in electrochemically etched ultrathin FeSe films on SrTiO3 and MgO Shiogai, J.; Ito, Y.; Mitsuhashi, T. Nature Physics, Vol. 12, Issue 1 https://doi.org/10.1038/nphys3530	journal	November 2015
Electronic structures of the SrTiO ₃ (110) surface in different reconstructions Cao, Yanwei; Wang, Shuai; Liu, Shuming The Journal of Chemical Physics, Vol. 137, Issue 4 https://doi.org/10.1063/1.4737946	journal	July 2012
Electron-phonon coupling enhanced by the FeSe/SrTiO ₃ interface Li, B.; Xing, Z. W.; Huang, G. Q. Journal of Applied Physics, Vol. 115, Issue 19 https://doi.org/10.1063/1.4876750	journal	May 2014
High resolution electron energy loss spectroscopy with two-dimensional energy and momentum mapping Zhu, Xuetao; Cao, Yanwei; Zhang, Shuyuan Review of Scientific Instruments, Vol. 86, Issue 8 https://doi.org/10.1063/1.4928215	journal	August 2015
Interface induced high temperature superconductivity in single unit-cell FeSe on SrTiO ₃ (110) Zhou, Guanyu; Zhang, Ding; Liu, Chong Applied Physics Letters, Vol. 108, Issue 20 https://doi.org/10.1063/1.4950964	journal	May 2016
Superconductivity in the PbO-type structure -FeSe Hsu, F. -C.; Luo, J. -Y.; Yeh, K. -W. Proceedings of the National Academy of Sciences, Vol. 105, Issue 38 https://doi.org/10.1073/pnas.0807325105	journal	September 2008
Electronic evidence of an insulator–superconductor crossover in single-layer FeSe/SrTiO ₃ films He, Junfeng; Liu, Xu; Zhang, Wenhao Proceedings of the National Academy of Sciences, Vol. 111, Issue 52 https://doi.org/10.1073/pnas.1414094112	journal	December 2014
Electric field-induced superconducting transition of insulating FeSe thin film at 35 K Hanzawa, Kota; Sato, Hikaru; Hiramatsu, Hidenori Proceedings of the National Academy of Sciences, Vol. 113, Issue 15 https://doi.org/10.1073/pnas.1520810113	journal	March 2016
Specific heat and electrocaloric properties of a SrTiO3 ceramic at low temperatures Lawless, W. N.; Morrow, A. J. Ferroelectrics, Vol. 15, Issue 1 https://doi.org/10.1080/00150197708237810	journal	January 1977
Nodal Gap in Fe-Based Layered Superconductor LaO _0.9 F _0.1-δ FeAs Probed by Specific Heat Measurements Gang, Mu; Xi-Yu, Zhu; Lei, Fang Chinese Physics Letters, Vol. 25, Issue 6 https://doi.org/10.1088/0256-307X/25/6/082	journal	May 2008
Interface-Induced High-Temperature Superconductivity in Single Unit-Cell FeSe Films on SrTiO ₃ Wang, Qing-Yan; Li, Zhi; Zhang, Wen-Hao Chinese Physics Letters, Vol. 29, Issue 3 https://doi.org/10.1088/0256-307X/29/3/037402	journal	March 2012
Direct Observation of High-Temperature Superconductivity in One-Unit-Cell FeSe Films Zhang, Wen-Hao; Sun, Yi; Zhang, Jin-Song Chinese Physics Letters, Vol. 31, Issue 1 https://doi.org/10.1088/0256-307X/31/1/017401	journal	January 2014
Interface high-temperature superconductivity Wang, Lili; Ma, Xucun; Xue, Qi-Kun Superconductor Science and Technology, Vol. 29, Issue 12 https://doi.org/10.1088/0953-2048/29/12/123001	journal	October 2016
QUANTUM ESPRESSO: a modular and open-source software project for quantum simulations of materials Giannozzi, Paolo; Baroni, Stefano; Bonini, Nicola Journal of Physics: Condensed Matter, Vol. 21, Issue 39, Article No. 395502 https://doi.org/10.1088/0953-8984/21/39/395502	journal	September 2009
High-temperature superconductivity in one-unit-cell FeSe films Wang, Ziqiao; Liu, Chaofei; Liu, Yi Journal of Physics: Condensed Matter, Vol. 29, Issue 15 https://doi.org/10.1088/1361-648X/aa5f26	journal	March 2017
Large electron–phonon interactions from FeSe phonons in a monolayer Coh, Sinisa; Cohen, Marvin L.; Louie, Steven G. New Journal of Physics, Vol. 17, Issue 7 https://doi.org/10.1088/1367-2630/17/7/073027	journal	July 2015
Enhanced superconductivity due to forward scattering in FeSe thin films on SrTiO ₃ substrates Rademaker, Louk; Wang, Yan; Berlijn, Tom New Journal of Physics, Vol. 18, Issue 2 https://doi.org/10.1088/1367-2630/18/2/022001	journal	February 2016
What makes the T _c of FeSe/SrTiO ₃ so high? Lee, Dung-Hai Chinese Physics B, Vol. 24, Issue 11 https://doi.org/10.1088/1674-1056/24/11/117405	journal	November 2015
Atomically resolved FeSe/SrTiO ₃ (001) interface structure by scanning transmission electron microscopy Li, Fangsen; Zhang, Qinghua; Tang, Chenjia 2D Materials, Vol. 3, Issue 2 https://doi.org/10.1088/2053-1583/3/2/024002	journal	March 2016
Elastic Constants of Strontium Titanate Bell, R. O.; Rupprecht, G. Physical Review, Vol. 129, Issue 1 https://doi.org/10.1103/PhysRev.129.90	journal	January 1963
Optical Modes of Vibration in an Ionic Crystal Slab Fuchs, Ronald; Kliewer, K. L. Physical Review, Vol. 140, Issue 6A https://doi.org/10.1103/PhysRev.140.A2076	journal	December 1965
Surface Lattice Dynamics of Silver. I. Low-Energy Electron Debye-Waller Factor Jones, Edwin R.; McKinney, James T.; Webb, Maurice B. Physical Review, Vol. 151, Issue 2 https://doi.org/10.1103/PhysRev.151.476	journal	November 1966
Transition Temperature of Strong-Coupled Superconductors McMillan, W. L. Physical Review, Vol. 167, Issue 2 https://doi.org/10.1103/PhysRev.167.331	journal	March 1968
Projector augmented-wave method Blöchl, P. E. Physical Review B, Vol. 50, Issue 24, p. 17953-17979 https://doi.org/10.1103/PhysRevB.50.17953	journal	December 1994
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set Kresse, G.; Furthmüller, J. Physical Review B, Vol. 54, Issue 16, p. 11169-11186 https://doi.org/10.1103/PhysRevB.54.11169	journal	October 1996
From ultrasoft pseudopotentials to the projector augmented-wave method Kresse, G.; Joubert, D. Physical Review B, Vol. 59, Issue 3, p. 1758-1775 https://doi.org/10.1103/PhysRevB.59.1758	journal	January 1999
Neutron scattering measurements of the phonon density of states of FeSe 1 − x superconductors Phelan, D.; Millican, J. N.; Thomas, E. L. Physical Review B, Vol. 79, Issue 1 https://doi.org/10.1103/PhysRevB.79.014519	journal	January 2009
Density of phonon states in superconducting FeSe as a function of temperature and pressure Ksenofontov, V.; Wortmann, G.; Chumakov, A. I. Physical Review B, Vol. 81, Issue 18 https://doi.org/10.1103/PhysRevB.81.184510	journal	May 2010
Coexistence of isotropic and extended s -wave order parameters in FeSe as revealed by low-temperature specific heat Lin, J. -Y.; Hsieh, Y. S.; Chareev, D. A. Physical Review B, Vol. 84, Issue 22 https://doi.org/10.1103/PhysRevB.84.220507	journal	December 2011
Interplay between lattice and spin states degree of freedom in the FeSe superconductor: Dynamic spin state instabilities Gnezdilov, Vladimir; Pashkevich, Yurii G.; Lemmens, Peter Physical Review B, Vol. 87, Issue 14 https://doi.org/10.1103/PhysRevB.87.144508	journal	April 2013
Interface charge doping effects on superconductivity of single-unit-cell FeSe films on SrTiO 3 substrates Zhang, Wenhao; Li, Zhi; Li, Fangsen Physical Review B, Vol. 89, Issue 6 https://doi.org/10.1103/PhysRevB.89.060506	journal	February 2014
Interface-enhanced electron-phonon coupling and high-temperature superconductivity in potassium-coated ultrathin FeSe films on SrTiO 3 Tang, Chenjia; Liu, Chong; Zhou, Guanyu Physical Review B, Vol. 93, Issue 2 https://doi.org/10.1103/PhysRevB.93.020507	journal	January 2016
Ab initio study of cross-interface electron-phonon couplings in FeSe thin films on SrTiO 3 and BaTiO 3 Wang, Y.; Linscheid, A.; Berlijn, T. Physical Review B, Vol. 93, Issue 13 https://doi.org/10.1103/PhysRevB.93.134513	journal	April 2016
Role of double Ti O 2 layers at the interface of FeSe/ SrTi O 3 superconductors Zou, Ke; Mandal, Subhasish; Albright, Stephen D. Physical Review B, Vol. 93, Issue 18 https://doi.org/10.1103/PhysRevB.93.180506	journal	May 2016
Role of SrTiO 3 phonon penetrating into thin FeSe films in the enhancement of superconductivity Zhang, Shuyuan; Guan, Jiaqi; Jia, Xun Physical Review B, Vol. 94, Issue 8 https://doi.org/10.1103/PhysRevB.94.081116	journal	August 2016
Observation of high- T c superconductivity in rectangular FeSe / SrTiO 3 ( 110 ) monolayers Zhang, P.; Peng, X. -L.; Qian, T. Physical Review B, Vol. 94, Issue 10 https://doi.org/10.1103/PhysRevB.94.104510	journal	September 2016
Phonon linewidth due to electron-phonon interactions with strong forward scattering in FeSe thin films on oxide substrates Wang, Yan; Rademaker, Louk; Dagotto, Elbio Physical Review B, Vol. 96, Issue 5 https://doi.org/10.1103/PhysRevB.96.054515	journal	August 2017
Dipolar phonons and electronic screening in monolayer FeSe on SrTiO 3 Zhou, Yuanjun; Millis, Andrew J. Physical Review B, Vol. 96, Issue 5 https://doi.org/10.1103/PhysRevB.96.054516	journal	August 2017
Is LaFeAsO 1 − x F x an Electron-Phonon Superconductor? Boeri, L.; Dolgov, O. V.; Golubov, A. A. Physical Review Letters, Vol. 101, Issue 2 https://doi.org/10.1103/PhysRevLett.101.026403	journal	July 2008
Measurement of Anomalous Phonon Dispersion of CaFe 2 As 2 Single Crystals Using Inelastic Neutron Scattering Mittal, R.; Pintschovius, L.; Lamago, D. Physical Review Letters, Vol. 102, Issue 21 https://doi.org/10.1103/PhysRevLett.102.217001	journal	May 2009
Interaction of Phonons and Dirac Fermions on the Surface of Bi 2 Se 3 : A Strong Kohn Anomaly Zhu, Xuetao; Santos, L.; Sankar, R. Physical Review Letters, Vol. 107, Issue 18 https://doi.org/10.1103/PhysRevLett.107.186102	journal	October 2011
Measurement of an Enhanced Superconducting Phase and a Pronounced Anisotropy of the Energy Gap of a Strained FeSe Single Layer in FeSe / Nb : SrTiO 3 / KTaO 3 Heterostructures Using Photoemission Spectroscopy Peng, R.; Shen, X. P.; Xie, X. Physical Review Letters, Vol. 112, Issue 10 https://doi.org/10.1103/PhysRevLett.112.107001	journal	March 2014
Evolution of High-Temperature Superconductivity from a Low- T c Phase Tuned by Carrier Concentration in FeSe Thin Flakes Lei, B.; Cui, J. H.; Xiang, Z. J. Physical Review Letters, Vol. 116, Issue 7 https://doi.org/10.1103/PhysRevLett.116.077002	journal	February 2016
Observation of Double-Dome Superconductivity in Potassium-Doped FeSe Thin Films Song, Can-Li; Zhang, Hui-Min; Zhong, Yong Physical Review Letters, Vol. 116, Issue 15 https://doi.org/10.1103/PhysRevLett.116.157001	journal	April 2016
High-Temperature Superconductivity in Single-Unit-Cell FeSe Films on Anatase TiO 2 ( 001 ) Ding, Hao; Lv, Yan-Feng; Zhao, Kun Physical Review Letters, Vol. 117, Issue 6 https://doi.org/10.1103/PhysRevLett.117.067001	journal	August 2016
Coexistence of Replica Bands and Superconductivity in FeSe Monolayer Films Rebec, S. N.; Jia, T.; Zhang, C. Physical Review Letters, Vol. 118, Issue 6 https://doi.org/10.1103/PhysRevLett.118.067002	journal	February 2017
Generalized Gradient Approximation Made Simple Perdew, John P.; Burke, Kieron; Ernzerhof, Matthias Physical Review Letters, Vol. 77, Issue 18, p. 3865-3868 https://doi.org/10.1103/PhysRevLett.77.3865	journal	October 1996
Giant Anharmonicity and Nonlinear Electron-Phonon Coupling in MgB 2 : A Combined First-Principles Calculation and Neutron Scattering Study Yildirim, T.; Gülseren, O.; Lynn, J. W. Physical Review Letters, Vol. 87, Issue 3 https://doi.org/10.1103/PhysRevLett.87.037001	journal	June 2001
Phonon Dispersion and Lifetimes in M g B 2 Shukla, Abhay; Calandra, Matteo; d’Astuto, Matteo Physical Review Letters, Vol. 90, Issue 9 https://doi.org/10.1103/PhysRevLett.90.095506	journal	March 2003
Monolayer FeSe on SrTiO ₃ Huang, Dennis; Hoffman, Jennifer E. Annual Review of Condensed Matter Physics, Vol. 8, Issue 1 https://doi.org/10.1146/annurev-conmatphys-031016-025242	journal	March 2017

Cited By (4)

Molecular Beam Epitaxy and Electronic Structure of Atomically Thin Oxyselenide Films Liang, Yan; Chen, Yujie; Sun, Yuanwei Advanced Materials, Vol. 31, Issue 39 https://doi.org/10.1002/adma.201901964	journal	August 2019
Unconventional pairing in single FeSe layers Jandke, Jasmin; Yang, Fang; Hlobil, Patrik Physical Review B, Vol. 100, Issue 2 https://doi.org/10.1103/physrevb.100.020503	journal	July 2019
Electron Phonon Coupling versus Photoelectron Energy Loss at the Origin of Replica Bands in Photoemission of FeSe on SrTiO 3 Li, Fengmiao; Sawatzky, George A. Physical Review Letters, Vol. 120, Issue 23 https://doi.org/10.1103/physrevlett.120.237001	journal	June 2018
Enhanced Superconducting State in FeSe / SrTiO 3 by a Dynamic Interfacial Polaron Mechanism Zhang, Shuyuan; Wei, Tong; Guan, Jiaqi Physical Review Letters, Vol. 122, Issue 6 https://doi.org/10.1103/physrevlett.122.066802	journal	February 2019

Figures / Tables (11)

Similar Records

Thickness-dependent coherent phonon frequency in ultrathin FeSe/SrTiO₃ films

Journal Article · Mon Jun 01 00:00:00 EDT 2015 · Nano Letters · OSTI ID:1183694

Electron-phonon coupling enhanced by the FeSe/SrTiO{sub 3} interface

Journal Article · Wed May 21 00:00:00 EDT 2014 · Journal of Applied Physics · OSTI ID:22304416

Electronic coupling between a FeSe monolayer film and

{SrTiO}_{3}

substrate

Journal Article · Tue Apr 04 20:00:00 EDT 2017 · Physical Review B · OSTI ID:1544398

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ab initio calculations
electron-phonon coupling
high-resolution electron energy loss spectroscopy
interfaces
lattice dynamics
optical phonons
phonons
superconductors
surface & interfacial phenomena