Bella Lake

Technical University of Berlin

Neutron scatteringQuantum spin liquidMagnetic fieldPhysicsInelastic scatteringAntiferromagnetismMagnetic susceptibilityMagnetic structureMaterials scienceMagnetismCondensed matter physicsInelastic neutron scatteringSpin waveSpin (physics)SuperconductivityQuantum mechanicsGround stateNeutron diffractionSpin-½Quantum

149Publications

28H-index

3,438Citations

Publications 147

Newest

#1A. R. N. Hanna (Technical University of Berlin)H-Index: 1

#2A. T. M. N. Islam (Helmholtz-Zentrum Berlin)H-Index: 11

Last. Bella Lake (Technical University of Berlin)H-Index: 28

view all 7 authors...

#1Vladimir Gnezdilov (Braunschweig University of Technology)

#2Vladimir KurnosovH-Index: 3

Last. Peter Lemmens (Braunschweig University of Technology)H-Index: 39

view all 9 authors...

The S=1Haldane state is constructed from a product of local singlet dimers in the bulk and topological states at the edges of a chain. It is a fundamental representative of topological quantum matter. Its well-known representative, the quasi-one-dimensional SrNi_2_2_8shows both conventional as well as unconventional magnetic Raman scattering. The former is observed as one- and two-triplet excitations with small linewidths and energies corresponding to the Haldane gap \Delta_Hand t...

#1S. Chillal (Helmholtz-Zentrum Berlin)H-Index: 4

#2A. T. M. N. Islam (Helmholtz-Zentrum Berlin)H-Index: 11

Last. Bella Lake (Technical University of Berlin)H-Index: 28

view all 5 authors...

Neutron diffraction of field-induced magnon condensation in the spin-dimerized antiferromagnet Sr_{3}r_{2}_{8}

#5F. Bourdarot (UGA: University of Grenoble)H-Index: 20

In this work, we investigate the evolution and settling of magnon condensation in the spin-1/2 dimer system Sr_{3}r_{2}_{8}using a combination of magnetostriction in pulsed fields and inelastic neutron scattering in a continuous magnetic field. The magnetic structure in the Bose-Einstein condensation (BEC) phase was probed by neutron diffraction in pulsed magnetic fields up to 39~T. The magnetic structure in this phase was confirmed to be an XY-antiferromagnetic structure validated by i...

Signatures for Berezinsky-Kosterlitz-Thouless critical behaviour in the planar antiferromagnet BaNi_2_2_8

#1E. S. KlyushinaH-Index: 3

#2Johannes ReutherH-Index: 25

Last. Bella Lake (Technical University of Berlin)H-Index: 28

view all 9 authors...

We investigate the critical properties of the spin-1honeycomb antiferromagnet BaNi_2_2_8 both below and above the ordering temperature T_Nusing neutron diffraction and muon spin rotation measurements. Our results characterize BaNi_2_2_8as a two-dimensional (2D) antiferromagnet across the entire temperature range, displaying a series of crossovers from 2D Ising-like to 2D XY and then to 2D Heisenberg behavior with increasing temperature. In particular, the extracted critic...

#1A. R. N. HannaH-Index: 1

#2A. T. M. N. IslamH-Index: 1

Last. Bella LakeH-Index: 28

view all 7 authors...

Single crystals of the three-dimensional frustrated magnet and spin liquid candidate compound PbCuTe_2_6were grown using both the Travelling Solvent Floating Zone (TSFZ) and the Top-Seeded Solution Growth (TSSG) techniques. The growth conditions were optimized by investigating the thermal properties. The quality of the crystals was checked by polarized optical microscopy, X-ray Laue and X-ray powder diffraction, and compared to the polycrystalline samples. Excellent quality crystals were o...

#1Allen ScheieH-Index: 11

#2Pontus LaurellH-Index: 10

Last. D. A. TennantH-Index: 37

view all 9 authors...

We demonstrate how quantum entanglement can be directly witnessed in the quasi-1D Heisenberg antiferromagnet KCuF_3 We apply three entanglement witnesses --- one-tangle, two-tangle, and quantum Fisher information --- to its inelastic neutron spectrum, and compare with spectra simulated by finite-temperature density matrix renormalization group (DMRG) and classical Monte Carlo methods. We find that each witness provides direct access to entanglement. Of these, quantum Fisher information is the...

Magnetic and electronic ordering phenomena in the Ru 2 O 6 -layer honeycomb lattice compound AgRuO 3

#1Walter Schnelle (MPG: Max Planck Society)H-Index: 57

#2Beluvalli E. PrasadH-Index: 5

Last. Hubertus LuetkensH-Index: 41

view all 16 authors...

The silver ruthenium oxide AgRuO_3consists of honeycomb [Ru_2^{5+}_6^{2-} layers, and can be considered an analogue of SrRu_2_6with a different intercalation stage. We present measurements of magnetic susceptibility and specific heat on AgRuO_3single crystals which reveal a sharp antiferromagnetic transition at 342(3)K. The electrical transport in single crystals of AgRuO_3is determined by a combination of activated conduction over an intrinsic semiconducting gap of $\approx...

Ferromagnetic MnSb 2 Te 4 : A p-type topological insulator with magnetic gap closing at high Curie temperatures of 45-50 K

#1Oliver RaderH-Index: 49

#2Sebastian WimmerH-Index: 15

Last. Günter SpringholzH-Index: 22

view all 21 authors...

#1A. SamartzisH-Index: 3

#2S. Chillal (Helmholtz-Zentrum Berlin)H-Index: 4

Last. Bella Lake (Technical University of Berlin)H-Index: 28

view all 9 authors...

We investigate the structural and magnetic properties of the new quantum magnet BaCuTe_2_6 This compound is synthesized for the first time in powder and single crystal form. Synchrotron X-ray and neutron diffraction reveal a cubic crystal structure (P4_12) where the magnetic Cu^{2+}ions form a complex network. Physical properties measurements suggest the presence of antiferromagnetic interactions with a Curie-Weiss temperature of -33K, while long-range magnetic order occurs at the mu...

Close Researchers

Desmond F. McMorrow

H-index : 25

A. T. M. N. Islam

H-index : 11

Minoru Nohara

H-index : 56

Christian Balz

H-index : 9

Christopher Frost

H-index : 31

Tatiana Guidi

H-index : 32

Hidenori Takagi

H-index : 90

D. A. Tennant

H-index : 37

A. T. M. Nazmul Islam

H-index : 9

Kim Lefmann

H-index : 30

Klaus Kiefer

H-index : 21

Manfred Reehuis

H-index : 31

This website uses cookies.

We use cookies to improve your online experience. By continuing to use our website we assume you agree to the placement of these cookies.

To learn more, you can find in our Privacy Policy.

To learn more, you can find in our Privacy Policy.