Local Spectroscopy and molecular Systems - P. Lemmens

 

 

  Peter Lemmens

Institute for Condensed Matter Physics
Institut für Physik der Kondensierten Materie

TU Braunschweig, Mendelssohnsstr. 3,
38106 Braunschweig, Germany

Tel:  +49 (0)531 391 5130
Fax: +49 (0)531 391 5155
Email: p.lemmens at tu-bs.de

     Welcome! Herzlich Willkommen!

News/Neuigkeiten:

  • Exkursion mit dem Physik III Kurs ins Phaeno, 13.1.2012

         

 

  • The nanoworld at your fingertips: The application for a plasma enhanced ALD (atomic layer deposition) was successful. This is a collaboration with the Waag and the Tornow group to prepare a new generation of nanostructured devices.

Hongdan Yan showing a nanostructured template made using priniciples of self-organization.

 

Recent important results and publicactions of the group:
   
   
Topological insulators allow collision dominated scattering with spin-helical symmetry. This scattering is due to fluctuations from Dirac to bulk states of the compound despite topological protection. The scattering rate is determined from the position of a maximum in the RL scattering component as G=40cm-1., see
  There is a crossover from coherent to incoherent excitations in the spin-orbit dominated Mott insulator Sr2IrO4 as function of the excitation energy of the experiment. This effect is based on J_eff=1/2 isospin states

Magnetic molecules can be tuned by a confinement in the nanocage of a Protein, see

The spontaneous emission (SE) rate of dye molecules (DCM) is controlled by confinement in porous Silicon (PS), see

Metallic and oxid wires of can be grown in templates. The picture shows nickel wires with a diameter of 50nm that are released from the regular and periodic arrangement in the template.
These techniques are used to transfer of length scales and periodicities on nanoscales, see

 

Light Harvesting: Capped CdSe-ZnS Quantum Dots show an ultrafast Charge Transport Dynamics that is relevant for the optimization of solar cells and other devices, see


  
 

 

Lectures and Seminars:

 

Wintersemester 2011  Topic - Lecture Materials
Vorlesung/Lecture Physik III: Atome und Kerne
Vorlesung/Lecture Rastersondenmethoden
Vorlesung/Lecture Current Topics in Metrology
Intern. Graduate School of Metrology

 

  Group members:    

 Group members: Room / Tel. - Lab. / Tel. - Email:
 

Peter Lemmens
114 / (0531) 391-5130
(0531) 391-5110
p.lemmens - at - tu-bs.de

Principal Investigator 
 

Kwang-Yong Choi
A. v. Humboldt-Fellow
Chung-Ang University, Seoul, Korea
 115 / (0531) 391-5108
(0531) 391-5110
kchoi - at - cau.ac.kr

Correlated Electron Systems
Multiferroics 

Project: AvH and DFG

 

Won Jun Lee
 
 Chung-Ang University, Seoul, Korea
 115 / (0531) 391-5108
(0531) 391-5110
 Correlated Electron Systems
Multiferroics 

Project: KSF and DFG
 

Yurii Pashkevich
-161 / (0531) 391-5121
y.pashkevich

O.O. Galkin, DIPE, NAS Ukraine

 Multiferroics
Band structure calculations
 

Vladimir Gnezdilov
113 / (0531) 391-5108
(0531) 391-7969
v.gnezdilov - at - tu-bs.de

ILTPE NAS Ukraine

 Inelastic Light Scattering
Quantum Spin Systems and Molecular Magnets

Project: DFG
 

Dirk Wulferding
 113 / (0531) 391-5131
(0531) 391-5110
d.wulferding - at - tu-bs.de

Inelastic Light Scattering
Correlated Electron Systems
Kagome systems

Project: DFG and ESF-HFM
 

Hongdan Yan
 113 / (0531) 391-5131
(0531) 391-7986
hd.yan - at - tu-bs.de

Nano- and Mesoporous Templates
Funtionalization of Anodized Alumina (AAO)
Electrochemical Growth of Nano Wires/Dots

Project: IGSM and NTH

 

Fatih Cetin
 113 / (0531) 391-5131
(0531) 391-7986
f.cetin - at - tu-bs.de

Correlated Electron Systems

Project: DFG, ESF-HFM

 

Viorel Felea
115 / (0531) 391-5108
(0531) 391-7986
v.felea - at - fzd.de

Ultrasound Spectroscopy, High-field Experiments
 Spinels

Project: DFG
 Long term visitors:      
 

Zhenya Sherman
-161 / (0531) 391-5117
evgeny_sherman - at - ehu.es

Ikerbasque Research Professor
Dpto. de Química-Física
Univ. del País Vasco, UPV/EHU
48080 Bilbao, Spain
 Spin-Orbit coupling, Dissipation in CES
 

Samir Kumar Pal
115 / 391-5117
391-7969
skpal at bose.res.in

S.N. Bose Nat. Center for Basic Science, Kolkata, India

Macromolecular, Nanoscience
and time resolved spectroscopies
 

Manash Kumar Ghosh
- 115 / (0531) 391-5117
(0531)  391-5110 
m.ghosh at iacs.res.in

Indian Association for Cultivation of Science, Kolkata, India

Surface enhanced Raman scattering
photo luminescence
 Dr. Vladimir Tsurkan   115 / 391-5117   391-7986  vtsurkan at yahoo.co.uk
 Former members:      
 

Anshuma Pathak
 113 / (0531) 391-5108 und 3800
(0531) 391-7986
a.pathak - at - tu-bs.de

Functionalization of nanoscale oxide and semiconductor surfaces

Project: IGSM together with M. Tornow

 

Johannes Dühn
 113 / (0531) 391-5131
(0531) 391-7986
j.duehn - at - tu-bs.de

Light-matter interaction

Project: NTH

 

Jaena Park
 113 / (0531) 391-5108
(0531) 391-7986
jaenapark - at - hotmail.com

Correlated Electron Systems

Project: DFG

 
 

Pushpendra Kumar
115 / (0531) 391-5108
(0531) 391-7986
p.kumar

Nano- and Mesoporous Templates
Funtionalization of Porous Silicon
 (DFG and NTH)
 

Dong Zhang
115 / (0531) 391-5108
(0531) 391-7986
dongzhang at jlu.edu.cn

Lone Pair Systems, Cobaltate and Pinictide Superconductors (DFG)

.. now at College of Physics, Jilin Univ., Changchun, China
 

Seth White
s.white at fkf.mpg.de

Tip enhanced Spectroscopies (NTH)

.. now at MPI-FKF, Stuttgart

 Moritz Doering TU-BS, a.doering at tu-bs.de
 Moritz Brendel TU-BS, mu at kelewrah
 Matthias Petzke TU-BS, m.petzke at tu-bs.de
 Andreas Kruse TU-BS, andreas.kruse at tu-bs.de
 Martin Valldor 2. PI, Univ. Köln, valldor at ph2.uni-koeln.de
 Patric Scheib Bundesamt für Strahlenschutz, pscheib at bfs de
 Matthias Grove Philips, Lightning, matthias.grove_2 at philips.com
 Adrian Ionescu Cavendish Lab., Sensor Group, Univ. of Cambridge, ai222 at cam.ac.uk
 Philipp Fröning Deutsches Patentamt, München
 Michael Fischer Atos Origin, michael.fischer at atosorigin.com
 Gerd Els Flugsicherheit, Frankfurt Airport
 Jens Pommer Waldorfschule, Düsseldorf
 Axel Hoffmann Argonne Nat. Lab., hoffmann at anl.gov

 

  Topical Research Projects:

   Research Topics - complete funding list, CV
 (q) Contacts in Nanosystems (NMWK-supported)
 (b)

Highly Frustrated Magnetism
an ESF Network

 (c) Intern. Graduate School on Metrology

Management Board and PI of the NMWK-supported School, inaugurated Oct. 2007
 (d) Magneto-capacitive coupling and
hybridization effects in Spinels
 (e)

 Lamellar Cobaltates

 (f) Light-Matter Interaction
of molecular emitters in nano templates
(g) Advanced Raman Scattering
in Materials Science
- ARSMS -

Activities in collaboration with Prof. L. Alff, TU Darmstadt.

 

 

Webpages of Peter Lemmens

Impressum: Diese Web-Seite stellt keine Meinungsäußerung der TU Braunschweig dar. Verantwortlich ist P. Lemmens, Adresse: siehe oben. Die Inhalte auf den folgenden Seiten dienen allein der Förderung von Wissenschaft und Forschung und sind nicht kommerziell. Vorlesungsmaterialien werden hier nur für Studenten der TU Braunschweig zur Verfügung gestellt und unterliegen zum Teil einem Copyright der Autoren/Verlage. Die Quellen sind angegeben. Bei Unstimmigkeiten bitte ich um umgehende Information. 

p.lemmens at tu-bs.de, letzte Änderung: 19.11.2011