Spin Polarization and Attosecond Time Delay in Photoemission from Spin Degenerate States of Solids

被引：34

作者：

Fanciulli, Mauro ^{[1
]}

Volfova, Henrieta ^{[2
]}

Muff, Stefan ^{[1
]}

Braun, Juergen ^{[2
]}

Ebert, Hubert ^{[2
]}

Minar, Jan ^{[2
,3
]}

Heinzmann, Ulrich ^{[4
]}

Dil, J. Hugo ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Inst Phys, CH-1015 Lausanne, Switzerland

[2] Univ Munich, Dept Chem, D-81377 Munich, Germany

[3] Univ West Bohemia, New Technol Res Ctr, CZ-30614 Plzen, Czech Republic

[4] Univ Bielefeld, Fac Phys, D-33501 Bielefeld, Germany

来源：

PHYSICAL REVIEW LETTERS | 2017年 / 118卷 / 06期

基金：

瑞士国家科学基金会;

关键词：

PHASE DIFFERENCES; EXPERIMENTAL-VERIFICATION; PHOTOIONIZATION PROCESS; MATRIX-ELEMENTS; XENON ATOMS; PHOTOELECTRONS; LIGHT;

D O I：

10.1103/PhysRevLett.118.067402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

After photon absorption, electrons from a dispersive band of a solid require a finite time in the photoemission process before being photoemitted as free particles, in line with recent attosecond-resolved photoemission experiments. According to the Eisenbud-Wigner-Smith model, the time delay is due to a phase shift of different transitions that occur in the process. Such a phase shift is also at the origin of the angular dependent spin polarization of the photoelectron beam, observable in spin degenerate systems without angular momentum transfer by the incident photon. We propose a semiquantitative model which permits us to relate spin and time scales in photoemission from condensed matter targets and to better understand spin-and angle-resolved photoemission spectroscopy (SARPES) experiments on spin degenerate systems. We also present the first experimental determination by SARPES of this time delay in a dispersive band, which is found to be greater than 26 as for electrons emitted from the sp-bulk band of the model system Cu(111).

引用

页数：5

共 53 条

[31] Calculation of angle-resolved photo emission spectra within the one-step model of photo emission-Recent developments [J].

Minar, J. ;

Braun, J. ;

Mankovsky, S. ;

Ebert, H. .

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 2011, 184 (3-6) :91-99

[32] Time shifts in photoemission from a fully correlated two-electron model system [J].

Nagele, S. ;

Pazourek, R. ;

Feist, J. ;

Burgdoerfer, J. .

PHYSICAL REVIEW A, 2012, 85 (03)

[33] Direct observation of electron propagation and dielectric screening on the atomic length scale [J].

Neppl, S. ;

Ernstorfer, R. ;

Cavalieri, A. L. ;

Lemell, C. ;

Wachter, G. ;

Magerl, E. ;

Bothschafter, E. M. ;

Jobst, M. ;

Hofstetter, M. ;

Kleineberg, U. ;

Barth, J. V. ;

Menzel, D. ;

Burgdoerfer, J. ;

Feulner, P. ;

Krausz, F. ;

Kienberger, R. .

NATURE, 2015, 517 (7534) :342-346

[34] Attosecond Time-Resolved Photoemission from Core and Valence States of Magnesium [J].

Neppl, S. ;

Ernstorfer, R. ;

Bothschafter, E. M. ;

Cavalieri, A. L. ;

Menzel, D. ;

Barth, J. V. ;

Krausz, F. ;

Kienberger, R. ;

Feulner, P. .

PHYSICAL REVIEW LETTERS, 2012, 109 (08)

[35]

Ossiander M, 2017, NAT PHYS, V13, P280, DOI [10.1038/NPHYS3941, 10.1038/nphys3941]

[36] Decoherence in Attosecond Photoionization [J].

Pabst, Stefan ;

Greenman, Loren ;

Ho, Phay J. ;

Mazziotti, David A. ;

Santra, Robin .

PHYSICAL REVIEW LETTERS, 2011, 106 (05)

[37] Attosecond chronoscopy of photoemission [J].

Pazourek, Renate ;

Nagele, Stefan ;

Burgdoerfer, Joachim .

REVIEWS OF MODERN PHYSICS, 2015, 87 (03)

[38] Time-resolved photoemission on the attosecond scale: opportunities and challenges [J].

Pazourek, Renate ;

Nagele, Stefan ;

Burgdoerfer, Joachim .

FARADAY DISCUSSIONS, 2013, 163 :353-376

[39] Direct measurements of the L-gap surface states on the (111) face of noble metals by photoelectron spectroscopy -: art. no. 115415 [J].

Reinert, F ;

Nicolay, G ;

Schmidt, S ;

Ehm, D ;

Hüfner, S .

PHYSICAL REVIEW B, 2001, 63 (11)

[40] SPIN POLARIZATION IN CU CORE-LEVEL PHOTOEMISSION WITH LINEARLY POLARIZED SOFT X-RAYS [J].

ROTH, C ;

HILLEBRECHT, FU ;

PARK, WG ;

ROSE, HB ;

KISKER, E .

PHYSICAL REVIEW LETTERS, 1994, 73 (14) :1963-1966

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