11946
2014
eng
075013
16
article
1
2015-10-01
--
--
Defect and structural imperfection effects on the electronic properties of BiTeI surfaces
The surface electronic structure of the narrow-gap seminconductor BiTeI exhibits a large Rashba-splitting which strongly depends on the surface termination. Here we report on a detailed investigation of the surface morphology and electronic properties of cleaved BiTeI single crystals by scanning tunneling microscopy, photoelectron spectroscopy (ARPES, XPS), electron diffraction (SPA-LEED) and density functional theory calculations. Our measurements confirm a previously reported coexistence of Te- and I-terminated surface areas originating from bulk stacking faults and find a characteristic length scale of ~100 nm for these areas. We show that the two terminations exhibit distinct types of atomic defects in the surface and subsurface layers. For electronic states resided on the I terminations we observe an energy shift depending on the time after cleavage. This aging effect is successfully mimicked by depositon of Cs adatoms found to accumulate on top of the I terminations. As shown theoretically on a microscopic scale, this preferential adsorbing behaviour results from considerably different energetics and surface diffusion lengths at the two terminations. Our investigations provide insight into the importance of structural imperfections as well as intrinsic and extrinsic defects on the electronic properties of BiTeI surfaces and their temporal stability.
New Journal of Physics
10.1088/1367-2630/16/7/075013
1367-2630
urn:nbn:de:bvb:20-opus-119467
New Journal of Physics 16 (2014) 075013. doi:10.1088/1367-2630/16/7/075013
Sebastian Fiedler
Lydia El-Kareh
Sergey V. Eremeev
Oleg E. Tereshchenko
Christoph Seibel
Peter Lutz
Konstantin A. Kokh
Evgueni V. Chulkov
Tatyana V. Kuznetsova
Vladimir I. Grebennikov
Hendrik Bentmann
Matthias Bode
Friedrich Reinert
eng
uncontrolled
electronic structure
eng
uncontrolled
spin–orbit coupling
eng
uncontrolled
surface morphology
eng
uncontrolled
semiconductor surfaces
Physikalische Chemie
Structure of clean surfaces (and surface reconstruction)
Electronic structure of liquid metals and semiconductors and their alloys
Other nonmetals
Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect
Surface states, band structure, electron density of states
Clean metal, semiconductor, and insulator surfaces
open_access
Physikalisches Institut
Universität Würzburg
https://opus.bibliothek.uni-wuerzburg.de/files/11946/038_Fiedler_New_Journal_of_Physics.pdf
24609
2021
eng
18
18
article
1
--
2021-09-07
--
A Diary Study on Anticipated Leisure Time, Morning Recovery, and Employees’ Work Engagement
Recovery during yesterday’s leisure time is beneficial for morning recovery, and morning recovery fosters employees’ work engagement, a positive, motivational state associated with job performance. We extended existing research by assuming that both, morning recovery (considered a resource) and anticipated leisure time (considered an anticipated resource gain), relate to work engagement. Anticipated leisure time comprises two constructs: general anticipation of leisure time, which refers to employees’ cognitive evaluation of their entire upcoming leisure time, and pleasant anticipation of a planned leisure activity, which describes a positive affective reaction because of one specific, upcoming leisure activity. We suggested that employees with high pleasant anticipation generate more thoughts of a planned leisure activity (ToPLA), which may distract them from their work, reducing their work engagement. A diary study over five days showed that morning recovery and general anticipation of leisure time were positively related to work engagement. Furthermore, employees with higher pleasant anticipation of a planned leisure activity reported more ToPLA. In contrast to our expectations, neither pleasant anticipation nor ToPLA was related to work engagement. In sum, this study introduced anticipated leisure time as a novel antecedent of work engagement and demonstrated that anticipated resource gains are important for high work engagement.
International Journal of Environmental Research and Public Health
1660-4601
10.3390/ijerph18189436
urn:nbn:de:bvb:20-opus-246090
2021-10-01T13:49:01+00:00
sword
swordwue
attachment; filename=deposit.zip
493ae716363ed1e7ea4796acd1a48f46
International Journal of Environmental Research and Public Health 2021, 18(18), 9436; https://doi.org/10.3390/ijerph18189436
false
true
CC BY: Creative-Commons-Lizenz: Namensnennung 4.0 International
Sebastian Seibel
Judith Volmer
eng
uncontrolled
morning recovery
eng
uncontrolled
leisure time
eng
uncontrolled
pleasant anticipation
eng
uncontrolled
work engagement
eng
uncontrolled
thoughts of a planned leisure activity
eng
uncontrolled
diary study
Psychologie
open_access
Institut für Psychologie
Import
Förderzeitraum 2021
Universität Würzburg
https://opus.bibliothek.uni-wuerzburg.de/files/24609/ijerph-18-09436-v2.pdf
26728
2022
eng
5
14
article
1
--
2022-03-07
--
Developing sustainable careers during a pandemic: the role of psychological capital and career adaptability
The Coronavirus disease 2019 (COVID-19) has not only had negative effects on employees' health, but also on their prospects to gain and maintain employment. Using a longitudinal research design with two measurement points, we investigated the ramifications of various psychological and organizational resources on employees' careers during the COVID-19 pandemic. Specifically, in a sample of German employees (N = 305), we investigated the role of psychological capital (PsyCap) for four career-related outcomes: career satisfaction, career engagement, coping with changes in career due to COVID-19, and career-related COVID-19 worries. We also employed leader–member exchange (LMX) as a moderator and career adaptability as a mediating variable in these relationships. Results from path analyses revealed a positive association between PsyCap and career satisfaction and career coping. Furthermore, PsyCap was indirectly related to career engagement through career adaptability. However, moderation analysis showed no moderating role of LMX on the link between PsyCap and career adaptability. Our study contributes to the systematic research concerning the role of psychological and organizational resources for employees' careers and well-being, especially for crisis contexts.
Sustainability
2071-1050
10.3390/su14053105
urn:nbn:de:bvb:20-opus-267286
2022-04-13T07:28:44+00:00
sword
swordwue
attachment; filename=deposit.zip
8df3debb82d1797b381a4783cdd89f48
Sustainability (2022) 14:5, 3105. https://doi.org/10.3390/su14053105
false
true
CC BY: Creative-Commons-Lizenz: Namensnennung 4.0 International
Jetmir Zyberaj
Sebastian Seibel
Annika F. Schowalter
Lennart Pötz
Stefanie Richter-Killenberg
Judith Volmer
eng
uncontrolled
psychological capital
eng
uncontrolled
career adaptability
eng
uncontrolled
LMX
eng
uncontrolled
career engagement
eng
uncontrolled
career satisfaction
eng
uncontrolled
career coping
eng
uncontrolled
COVID-19
Psychologie
open_access
Institut für Psychologie
Import
Universität Würzburg
https://opus.bibliothek.uni-wuerzburg.de/files/26728/sustainability-14-03105.pdf
28610
2022
eng
16
11
article
1
--
2022-08-15
--
The acid ceramidase is a SARS-CoV-2 host factor
SARS-CoV-2 variants such as the delta or omicron variants, with higher transmission rates, accelerated the global COVID-19 pandemic. Thus, novel therapeutic strategies need to be deployed. The inhibition of acid sphingomyelinase (ASM), interfering with viral entry by fluoxetine was reported. Here, we described the acid ceramidase as an additional target of fluoxetine. To discover these effects, we synthesized an ASM-independent fluoxetine derivative, AKS466. High-resolution SARS-CoV-2–RNA FISH and RTqPCR analyses demonstrate that AKS466 down-regulates viral gene expression. It is shown that SARS-CoV-2 deacidifies the lysosomal pH using the ORF3 protein. However, treatment with AKS488 or fluoxetine lowers the lysosomal pH. Our biochemical results show that AKS466 localizes to the endo-lysosomal replication compartments of infected cells, and demonstrate the enrichment of the viral genomic, minus-stranded RNA and mRNAs there. Both fluoxetine and AKS466 inhibit the acid ceramidase activity, cause endo-lysosomal ceramide elevation, and interfere with viral replication. Furthermore, Ceranib-2, a specific acid ceramidase inhibitor, reduces SARS-CoV-2 replication and, most importantly, the exogenous supplementation of C6-ceramide interferes with viral replication. These results support the hypotheses that the acid ceramidase is a SARS-CoV-2 host factor.
Cells
2073-4409
10.3390/cells11162532
urn:nbn:de:bvb:20-opus-286105
2022-09-07T16:17:24+00:00
sword
swordwue
attachment; filename=deposit.zip
cc94502256a072c13975adaddddc869e
Cells (2022) 11:16, 2532. doi:10.3390/cells11162532
CC BY: Creative-Commons-Lizenz: Namensnennung 4.0 International
Nina Geiger
Louise Kersting
Jan Schlegel
Linda Stelz
Sofie Fähr
Viktoria Diesendorf
Valeria Roll
Marie Sostmann
Eva-Maria König
Sebastian Reinhard
Daniela Brenner
Sibylle Schneider-Schaulies
Markus Sauer
Jürgen Seibel
Jochen Bodem
eng
uncontrolled
SARS-CoV-2
eng
uncontrolled
ceramides
eng
uncontrolled
ceramidase
eng
uncontrolled
fluoxetine
eng
uncontrolled
acid sphingomyelinase
Medizin und Gesundheit
open_access
Institut für Virologie und Immunbiologie
Theodor-Boveri-Institut für Biowissenschaften
Institut für Organische Chemie
Import
Förderzeitraum 2022
Universität Würzburg
https://opus.bibliothek.uni-wuerzburg.de/files/28610/cells-11-02532-v2.pdf