Welcome to the English website of the Research group of complex quantum materials and their microstructures

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Our research fields and some representative works


Iron based superconductor/oxide interface/thin films

P. K. Biswas, Z. Salman, Q. Song, R. Peng, J. Zhang, L. Shu, D. L. Feng, T. Prokscha, A. Suter, E. Morenzoni*,  Direct evidence of superconductivity and determination of the superfluid density in buried ultrathin FeSe grown on SrTiO3. Phys. Rev. B 97, 174509 (2018)

S. Y. Tan, C. H. P. Wen, M. Xia, J. Jiang, Q. Song, B. P. Xie, X. C. Lai, D. L. Feng, Electronic structure and magnetic phase transition of hexagonal FeSe thin films studied by photoemission spectroscopy, Phys. Rev. B 96, 155124 (2017)

C. H. P. Wen, H. C. Xu, C. Chen, Z. C. Huang, X. Lou, Y. J. Pu, Q. Song, B. P. Xie, M. Abdel-Hafiez, D. A. Chareev, A. N. Vasiliev, R. Peng* & D. L. Feng*, Anomalous correlation effects and unique phase diagram of electron-doped FeSe revealed by photoemission spectroscopy, Nat. Commun. 7:10840 (2016)

W. H. Zhang, X. Liu, W. C. H. P. Wen, R. Peng, S. Y. Tan, B. P. Xie, T. Zhang*, D. L. Feng*, Effects of surface electron doping and substrate on the superconductivity of epitaxial FeSe films, Nano Lett. 16, 1969-1973 (2016)

S. Y. Tan, Y. Fang, D. H. Xie, W. Feng, C. H. P. Wen, Q. Song, Q. Y. Chen, W. Zhang, Y. Zhang, L. Z. Luo, B. P. Xie, X. C. Lai*, D. L. Feng, Observation of Dirac Cone Band Dispersion in FeSe Thin Films by Photoemission Spectroscopy, Phys. Rev. B 93, 104513 (2016)

Y. J. Pu, Z. C. Huang, H. C. Xu, D. F. Xu, Q Song, C. H. P. Wen, R. Peng*, and D. L. Feng*, Temperature-induced orbital selective localization and coherent-incoherent crossover in single-layer FeSe/Nb:BaTiO3/KTaO3, Phys. Rev. B 94, 115146 (2016)

Z. C. Huang, Y. J. Pu, H. C. Xu, D. F. Xu, Q. Song, X. Lou, C. H. P. Wen, R. Peng*, and D. L. Feng*, “Electronic structure and superconductivity of single-layer FeSe on Nb:SrTiO3/LaAlO3 with varied tensile strain”, 2D Mater. 3, 014005 (2016)

Q. Fan, W. H. Zhang, X. Liu, Y. J. Yan, M. Q. Ren, R. Peng, H. C. Xu, B. P. Xie, J. P. Hu, T. Zhang*, and D. L. Feng*, Plain s-wave superconductivity in single-layer FeSe on SrTiO3 probed by scanning tunneling microscopy, Nat. Phys. 11, 946–952 (2015)

R. Peng, X. P. Shen, X. Xie, H. C. Xu, S. Y. Tan, M. Xia, T. Zhang, H. Y. Cao, X. G. Gong, J. P. Hu, B. P. Xie, D. L. Feng*, Measurement of an Enhanced Superconducting Phase and a Pronounced Anisotropy of the Energy Gap of a Strained FeSe Single Layer in FeSe/Nb:SrTiO3/KTaO3 Hetero-structures Using Photoemission Spectroscopy, Physical Review Letters 112, 107001 (2014)

S. Tan, Y. Zhang, M. Xia, Z. Ye, F. Chen, X. Xie, R. Peng, D. Xu, Q. Fan, H. Xu, J. Jiang, T. Zhang, X. Lai, T. Xiang, J. Hu, B. Xie, and D. L. Feng, “Interface-induced superconductivity and strain-dependent spin density waves in FeSe/SrTiO3 thin films” Nature Materials 12, 634–640 (2013)

Iron based superconductor(crystalline)

Qin Liu, Chen Chen, Tong Zhang et al., “Robust and clean Majorana zero mode in the vortex core of high-temperature superconductor (Li0.84Fe0.16)OHFeSe”, Phys. Rev. X 8, 041056 2018


M. Q. Ren, Y. J. Yan, X. H. Niu, R. Tao, D. Hu, R. Peng, B. P. Xie, J. Zhao, T. Zhang*, D. L. Feng*, Superconductivity across Lifshitz transition and anomalous insulating state in surface K-dosed (Li0.8Fe0.2OH)FeSe, Science Advances 3, e1603238 (2017)

J. Miao, X. H. Niu, D. F. Xu, Q. Yao, Q. Y. Chen, T. P. Ying, S. Y. Li, Y. F. Fang, J. C. Zhang,S. Ideta, K. Tanaka, B. P. Xie*, D. L. Feng†, and Fei Chen‡, “Electronic structure of FeS”, Phys. Rev. B, 95, 205127 (2017)

H. C. Xu, X. H. Niu, D. F. Xu, J. Jiang, Q. Yao, Q. Y. Chen, Q. Song, M. Abdel-Hafiez, D. A. Chareev, A. N. Vasiliev, Q. S. Wang, H. L. Wo, J. Zhao, R. Peng*, and D. L. Feng*, Highly anisotropic and two fold symmetric superconducting gap in nematically ordered FeSe0.93S0.07, Phys. Rev. Lett. 117, 157003 (2016)

Y. J. Yan, W. H. Zhang, M. Q. Ren, X. Liu, X. F. Lu, N. Z. Wang, X. H. Niu, Q. Fan, J. Miao, R. Tao, B. P. Xie, X. H. Chen, T. Zhang, and D. L. Feng*, Surface electronic structure and evidence of plain s-wave superconductivity in (Li0.8Fe0.2)OHFeSe, Phys. Rev. B 94, 134502 (2016)

X. H. Niu, S. D. Chen, J. Jiang, Z. R. Ye, T. L. Yu, D. F. Xu, M. Xu, Y. Feng, Y. J. Yan, B. P. Xie, J. Zhao, D. C. Gu, L. L. Sun, Q. H. Mao, H. D. Wang, M. H. Fang, C. J. Zhang, J. P. Hu, Z. Sun and D. L. Feng*, A unifying phase diagram with correlation-driven superconductor-to-insulator transition for the 122 series of iron chalcogenides, Phys. Rev. B 93, 054516 (2016)

X. H. Niu, R. Peng, H. C. Xu, Y. J. Yan, J. Jiang, D. F. Xu, T. L. Yu, Q. Song, Z. C. Huang, Y. X. Wang, B. P. Xie, X. F. Lu, N. Z. Wang, X. H. Chen, Z. Sun, and D. L. Feng, Surface electronic structure and isotropic superconducting gap in (Li0.8Fe0.2)OHFeSe, Phys. Rev. B 92, 060504(R) (2015)

Y. Zhang, Z. R. Ye, Q. Q. Ge, F. Chen, Juan Jiang, M. Xu, B. P. Xie, D. L. Feng*, “Nodal superconducting-gap structure in ferropnictide superconductor BaFe2(As0.7P0.3)2” Nature Physics 8, 371-375 (2012).

Q. Q. Ge, Z. R. Ye, M. Xu, Y. Zhang, J. Jiang, B. P. Xie, Y. Song, C. L. Zhang, P. Dai, and D. L. Feng*, “Anisotropic but Nodeless Superconducting Gap in the Presence of Spin-Density Wave in Iron-Pnictide Superconductor NaFe1-xCoxAs” Physical Review X 3, 011020 (2013).

F. Chen, M. Xu, Q. Q. Ge, Y. Zhang,* Z. R. Ye, L. X. Yang, Juan Jiang, B. P. Xie, R. C. Che, M. Zhang, A. F. Wang, X. H. Chen, D.W. Shen, J. P. Hu, and D. L. Feng, “Electronic Identification of the Parental Phases and Mesoscopic Phase Separation of KxFe2-ySe2 Superconductors”, Physical Review X 1, 021020 (2011).

Y. Zhang, L. X. Yang, M. Xu , Z. R. Ye, F. Chen, C. He, H. C. Xu, J. Jiang, B. P. Xie, J. J. Ying, X. F. Wang, X. H. Chen, Jiangping Hu, M. Matsunami, S. Kimura, D. L. Feng*, “Nodeless superconducting gap in AxFe2Se2 (A=K, Cs) revealed by angle-resolved photoemission spectroscopy”, Nature Materials 10, 273-277 (2011).

C. He, Y. Zhang, B. P. Xie, X. F. Wang, L. X. Yang, B. Zhou, F. Chen, M. Arita, K. Shimada, H. Namatame, M. Taniguchi, X. H. Chen, J. P. Hu* and D. L. Feng*, “Electronic-Structure-Driven Magnetic and Structure Transitions in Superconducting NaFeAs Single Crystals Measured by Angle-Resolved Photoemission Spectroscopy”, Physical Review Letters 105, 117002 (2010).

Y. Zhang, L. X. Yang, F. Chen, B. Zhou, X. F. Wang, X. H. Chen, M. Arita, K. Shimada, H. Namatame, M. Taniguchi, J. P. Hu, B. P. Xie, and D. L. Feng*, “Out-of-Plane Momentum and Symmetry-Dependent Energy Gap of the Pnictide Ba0.6K0.4Fe2As2 Superconductor Revealed by Angle-Resolved Photoemission Spectroscopy” Physical Review Letters 105, 117003 (2010).

Y. Zhang, J. Wei, H. W. Ou, J. F. Zhao, B. Zhou, F. Chen, M. Xu, C. He, G. Wu, H. Chen, M. Arita, K. Shimada, H. Namatame, M. Taniguchi, X. H. Chen, D. L. Feng*, “Unusual Doping Dependence of the Electronic Structure and Coexistence of Spin-Density-Wave and Superconductor Phases in single crystalline Sr1-xKxFe2As2," Physical Review Letters 102, 127003 (2009)

L. X. Yang, Y. Zhang, H.W. Ou, J. F. Zhao, D.W. Shen, B. Zhou, J. Wei, F. Chen, M. Xu, C. He, Y. Chen, Z. D. Wang, X. F. Wang, T. Wu, G. Wu, X. H. Chen, M. Arita, K. Shimada, M. Taniguchi, Z.Y. Lu, T. Xiang, D. L. Feng*, “Electronic Structure and Unusual Exchange Splitting in the Spin-Density-Wave State of the BaFe2As2 Parent Compound of Iron-Based Superconductors" Physical Review Letters 102, 107002 (2009)

Cuprate High-Tc superconductors


Y. J. Yan, M. Q. Ren, H. C. Xu, B. P. Xie, R. Tao, H. Y. Choi, N. Lee, Y. J. Choi, T. Zhang, and D. L. Feng*, Electron-Doped Sr2IrO4: An Analogue of Hole-Doped Cuprate Superconductors Demonstrated by Scanning Tunneling Microscopy, Phys. Rev. X 5, 041018 (2015)

J. Wei, Y. Zhang, H. W. Ou, B. P. Xie, D. W. Shen, J. F. Zhao, L. X. Yang, M. Arita, K. Shimada, H. Namatame, M. Taniguchi, Y. Yoshida, H. Eisaki, D. L. Feng*, “Superconducting coherence peak in the electronic excitations of a single layer cuprate superconductor Bi2Sr1.6La0.4CuO6+δ” Physical Review Letters 101, 097005 (2008)

B. P. Xie, K. Yang, D.W. Shen, J. F. Zhao, H.W. Ou, J. Wei, S.Y. Gu, M. Arita, S. Qiao, H. Namatame, M. Taniguchi, N. Kaneko, H. Eisaki, K. D. Tsuei, C. M. Cheng, I. Vobornik, J. Fujii, G. Rossi, Z. Q. Yang, and D. L. Feng* , High-Energy Scale Revival and Giant Kink in the Dispersion of a Cuprate Superconductor” Physical Review Letters 98, 147001 (2007)


Topological /Large Magnetoresistance Material


Ran Tao, Ya-Jun Yan*, Xi Liu, Zhi-Wei Wang, Yoichi Ando, Qiang-Hua Wang, Tong Zhang, and Dong-Lai Feng*, Direct Visualization of the Nematic Superconductivity in CuxBi2Se3, Phys. Rev. X 8, 041024  (2018)

J. Jiang
, F. Tang, X. C. Pan, H. M. Liu, X. H. Niu, Y. X. Wang, D. F. Xu, H. F. Yang, B. P. Xie, F. Q. Song, P. Dudin, T. K. Kim, M. Hoesch, P. K. Das, I. Vobornik, X. G. Wan*, and D. L. Feng*, Signature of strong spin-orbital coupling in the large nonsaturating magnetoresistance material WTe2, Phys. Rev. Lett. 115, 166601 (2015)

J. Jiang
, S. Li, T. Zhang, Z. Sun, F. Chen, Z. R. Ye, M. Xu, Q. Q. Ge, S. Y. Tan, X. H. Niu, M. Xia, B. P. Xie, Y. F. Li, X. H. Chen, H. H. Wen, D. L. Feng*, Observation of possible topological in-gap surface states in the Kondo insulator SmB6 by photoemission, Nature Communications 4:3010 (2013).

Mott transition

H.C. Xu, Y. Zhang, M. Xu, R. Peng, X.P. Shen, V.N. Strocov, M. Shi, M. Kobayashi, T. Schmitt, B. P. Xie, and D.L. Feng*, Direct Observation of the Bandwidth Control Mott Transition in the NiS2−xSex Multiband System, Physical Review Letters 112, 087603 (2014).

Oxide interface

R. Peng, H. C. Xu, M. Xia, J. F. Zhao, X. Xie, D. F. Xu, B. P. Xie* and D. L. Feng*, Tuning the dead-layer behavior of La0.67Sr0.33MnO3/SrTiO3 via interfacial engineering, Applied Physics Letters 104, 081606 (2014).

封东来,沈大伟,徐海超,彭瑞,《物理》,41卷第4期封面文章,211-216 (2012)

H. W. Ou, J. F. Zhao, Y. Zhang, B. P. Xie, D. W. Shen, Y. Zhu, Z. Q. Yang, J. G. Che, X. G. Luo, X. H. Chen, M. Arita, K. Shimada, H. Namatame, M. Taniguchi, C. M. Cheng, K. D. Tsuei, D. L. Feng*, “Novel Electronic Structure Induced by a Highly Strained Oxide Interface with Incommensurate Crystal Fields" Physical Review Letters 102 (2), 026806 (2009)

Charge density wave

M. Q. Ren, Y. J. Yan, J. Jiang, S. Y. Tan, J. Miao, C. Chen, Y. Song, C. L. Zhang, P. C. Dai, B. P. Xie, T. Zhang and D. L. Feng*, Lattice distortion and charge density wave in Na2Ti2Sb2O revealed by scanning tunnelling microscopy, Philosophical Magazine, 97, no. 7, 527–534 (2017)

H. C. Xu, M. Xu, R. Peng, Y. Zhang, Q. Q. Ge, F. Qin, M. Xia, J. J. Ying, X. H. Chen, X. L. Yu, L. J. Zou, M. Arita, K. Shimada, M. Taniguchi, D. H. Lu, B. P. Xie*, and D. L. Feng*, Electronic structure of the BaTi2As2O parent compound of the titanium-based oxypnictide superconductor, Physical Review B 89, 155108 (2014).

Q. Fan, W. H. Zhang, X. Liu, Y. J. Yan, M. Q. Ren, M. Xia, H. Y. Chen, D. F. Xu, Z. R. Ye, W. H. Jiao, G. H. Cao, B. P. Xie, T. Zhang*, and D. L. Feng, Scanning tunneling microscopy study of superconductivity, magnetic vortices, and possible charge-density wave in Ta4Pd3Te16, Phys. Rev. B 91, 104506 (2015)

D. W. Shen, Y. Zhang, L. X. Yang, J. Wei, H. W. Ou, J. K. Dong, C. He, B. P. Xie, J. F. Zhao, B. Zhou, M. Arita, K. Shimada, H. Namatame, M. Taniguchi, J. Shi, D. L. Feng*, “Primary role of the barely occupied states in the charge density wave formation of NbSe2" Physical Review Letters 101, 226406 (2008)

D. W. Shen, B. P. Xie, J. F. Zhao, L. X. Yang, L. Fang, J. Shi, R. H. He, D. H. Lu, H. H. Wen, D. L. Feng* “A novel mechanism of charge density wave in a transition metal dichalcogenide” Physical Review Letters, 99, 216404 (2007)

J. F. Zhao, H. W. Ou, G. Wu, B. P. Xie, Y. Zhang, D. W. Shen, J. Wei, L. X. Yang, J. K. Dong, M. Arita, H. Namatame, M. Taniguchi, X. H. Chen, and D. L. Feng* “Evolution of the Electronic Structure of 1T-CuxTiSe2” Physical Review Letters, 99,146401 (2007)

Other High Tc Superconductors

C.H.P. Wen, H.C. Xu*, Q. Yao, R. Peng, X.H. Niu, Q.Y. Chen, Z.T. Liu, D.W. Shen, Q. Song, X. Lou, Y.F. Fang, X.S. Liu, Y.H. Song, Y.J. Jiao, T.F. Duan, H.H. Wen, P. Dudin, G. Kotliar, Z.P. Yin*, and D.L. Feng*, Unveiling the Superconducting Mechanism of Ba0.51K0.49BiO3, Phys. Rev. Lett. 121, 117002 (2018)

D. F. Xu, D. W. Shen, D. Zhu, J. Jiang, B. P. Xie, Q. S. Wang, B. Y. Pan, P. Dudin, T. K. Kim, M. Hoesch, J. Zhao, X. G. Wan, and D. L. Feng, Electronic structure of YFe2Ge2 studied by angle-resolved photoemission spectroscopy, Phys. Rev. B 93, 024506 (2016)

Q. Song, Y. J. Yan, Z. R. Ye, M. Q. Ren, D. F. Xu, S. Y. Tan, X. H. Niu, B. P. Xie, T. Zhang, R. Peng, H. C. Xu, J. Jiang, and D. L. Feng, Electronic structure of the titanium-based oxypnictide superconductor Ba0.95Na0.05Ti2Sb2O and direct observation of its charge density wave order, Phys. Rev. B 93, 024508 (2016)

D. C. Peets, T. P. Ying, X. P. Shen, Y. J. Yu, M. Avdeev, S. Y. Li, D. L. Feng, Physical properties of noncentrosymmetric tungsten and molybdenum aluminides, Phys. Rev. MATER. 2, 103403 (2018)


2D Materials

Q. Yao, D. W. Shen*, C. H. P. Wen, C. Q. Hua, L. Q. Zhang, N. Z. Wang, X. H. Niu, Q. Y. Chen, P. Dudin, Y. H. Lu, Y. Zheng, X. H. Chen, X. G. Wan, and D. L. Feng, “Charge transfer effects in naturally occurring van der Waals heterostructures (PbSe)1.16(TiSe2)m (m=1, 2)”, Phys. Rev. Lett. 120, 106401 (2018)


Heavy Fermions

Q.Y. Chen, D.F. Xu, X.H. Niu, R. Peng, H.C. Xu, C.H.P. Wen, X. Liu, L. Shu, S.Y. Tan, X.C. Lai, Y.J. Zhang, H. Lee, V.N. Strocov, F. Bisti, P. Dudin, J.-X. Zhu, H.Q. Yuan, S. Kirchner*, and D.L. Feng*, “Band Dependent Interlayer f-Electron Hybridization in CeRhIn5Phys. Rev. Lett. 120, 066403 (2018)

Q. Y. Chen, C. H. P. Wen, Q. Yao, K. Huang, Z. F. Ding, L. Shu, X. H. Niu, Y. Zhang, X. C. Lai, Y. B. Huang, G. B. Zhang, S. Kirchner, and D. L. Feng. Tracing crystal-field splittings in the rare-earth-based intermetallic CeIrIn5, Phys. Rev. B 97, 075149 (2018)

Q. Y. Chen, D. F. Xu, X. H. Niu, J. Jiang, R. Peng, H. C. Xu, C. H. P. Wen, Z. F. Ding, K. Huang, L. Shu, Y. J. Zhang, H. Lee, V. N. Strocov, M. Shi, F. Bisti, T. Schmitt, Y. B. Huang, P. Dudin, X. C. Lai, S. Kirchner, * H. Q. Yuan and D. L. Feng†, “Direct observation of how the heavy-fermion state develops in CeCoIn5Phys. Rev. B, 96, 045107 (2017)



Spin liquid

Q. Q. Ge, H. C. Xu, X. P. Shen, M. Xia, B. P. Xie, F. Chen, Y. Zhang, R. Kato, T. Tsumuraya, T. Miyazaki, M. Matsunami, S. Kimura, and D. L. Feng, Angle-resolved photoemission study of the electronic structure of the quantum spin liquid EtMe3Sb[Pd(dmit)2]2, Physical Review B 89, 075105 (2014).

Atomic and molecular gases and crystals

B. P. Xie, L. F. Zhu*, K. Yang, B. Zhou, N. Hiraoka, Y. Q. Cai, Y. Yao, C. Q. Wu, E. L. Wang, and D. L. Feng*, “High-resolution inelastic x-ray scattering study of the state-resolved differential cross section of Compton excitations in helium atoms”, Physical Review A 82, 032501 (2010)
K. Yang, L. P. Chen, Y. Q. Cai, N. Hiraoka, S. Li, J. F. Zhao, D. W. Shen, H. F. Song, H. Tian, L. H. Bai, Z. H. Chen, Z. G. Shuai, D. L. Feng* “Inelastic x-ray scattering study of exciton properties in an organic molecular crystal”, Physical Review Letters 98, 036404 (2007)

Reviews and books

Dong-Lai Feng, “Photoemission spectroscopy: Deep into the bulk” Nature Materials 10, 729–730 (2011) (news and views)







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