Tommy Kotte
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View article: Doping dependence of the low temperature planar carrier density in overdoped YBa$_2$Cu$_3$O$_{7-δ}$
Doping dependence of the low temperature planar carrier density in overdoped YBa$_2$Cu$_3$O$_{7-δ}$ Open
Whether a quantum critical point (QCP) demarcates the end of the pseudogap (PG) regime in hole-doped cuprates at a singular doping level $p^* \approx 0.19$ remains an open question. A crucial part of this puzzle is how the carrier density …
View article: Rotational magnetoelastic interactions in the Dzyaloshinskii-Moriya magnet <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Ba</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>CuGe</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>7</mml:mn></mml:msub></mml:mrow></mml:math>
Rotational magnetoelastic interactions in the Dzyaloshinskii-Moriya magnet Open
We report the magnetoelastic properties of a Ba2CuGe2O7 single crystal at low temperatures under a magnetic field applied along the crystallographic [001] axis. Our results extend to low temperatures, the H−T phase diagram determined for t…
View article: Atacamite <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi>Cu</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mi>Cl</mml:mi><mml:msub><mml:mrow><mml:mo stretchy="false">(</mml:mo><mml:mrow><mml:mi>OH</mml:mi></mml:mrow><mml:mo stretchy="false">)</mml:mo></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math> in High Magnetic Fields: Quantum Criticality and Dimensional Reduction of a Sawtooth-Chain Compound
Atacamite in High Magnetic Fields: Quantum Criticality and Dimensional Reduction of a Sawtooth-Chain Compound Open
We report an extensive high-field study of atacamite Cu2Cl(OH)3, a material realization of quantum sawtooth chains with weak interchain couplings, in continuous and pulsed magnetic fields up to 58 T. In particular, we have mapped the entro…
View article: Fermi-liquid transport beyond the upper critical field in superconducting La$_2$PrNi$_2$O$_7$ thin films
Fermi-liquid transport beyond the upper critical field in superconducting La$_2$PrNi$_2$O$_7$ thin films Open
Unconventional superconductivity typically emerges out of a strongly correlated normal state, manifesting as a Fermi liquid with highly enhanced effective mass or a strange metal with $T$-linear resistivity in the zero-temperature limit. I…
View article: Giant quantum oscillations in thermal transport in low-density metals via electron absorption of phonons
Giant quantum oscillations in thermal transport in low-density metals via electron absorption of phonons Open
Oscillations of conductance observed in strong magnetic fields are a striking manifestation of the quantum dynamics of charge carriers in solids. The large charge carrier density in typical metals sets the scale of oscillations in both ele…
View article: Origin of the non-Fermi-liquid behavior in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>CeRh</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>As</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>
Origin of the non-Fermi-liquid behavior in Open
Unconventional superconductivity in heavy-fermion systems appears often near magnetic quantum critical points (QCPs). This seems to be the case also for CeRh2As2 (Tc ≈0.31 K). CeRh2As2 shows two superconducting (SC) phases, SC1 and SC2, fo…
View article: Rotational magnetoelastic interactions in the Dzyaloshinskii-Moriya magnet Ba$_2$CuGe$_2$O$_7$
Rotational magnetoelastic interactions in the Dzyaloshinskii-Moriya magnet Ba$_2$CuGe$_2$O$_7$ Open
We report the magnetoelastic properties of a Ba$_2$CuGe$_2$O$_7$ single crystal at low temperatures under a magnetic field applied along the crystallographic [001] axis. Our results extend to low temperature the $H-T$ phase diagram determi…
View article: Interface Dependent Coexistence of Two‐Dimensional Electron and Hole Gases in Mn‐doped InAs/GaSb
Interface Dependent Coexistence of Two‐Dimensional Electron and Hole Gases in Mn‐doped InAs/GaSb Open
The interface of common III‐V semiconductors InAs and GaSb can be utilized to realize a two‐dimensional (2D) topological insulator state. The 2D electronic gas at this interface can yield Hall quantization from coexisting electrons and hol…
View article: Atacamite Cu$_2$Cl(OH)$_3$ in High Magnetic Fields: Quantum Criticality and Dimensional Reduction of a Sawtooth-Chain Compound
Atacamite Cu$_2$Cl(OH)$_3$ in High Magnetic Fields: Quantum Criticality and Dimensional Reduction of a Sawtooth-Chain Compound Open
We report an extensive high-field study of atacamite Cu$_2$Cl(OH)$_3$, a material realization of quantum sawtooth chains with weak interchain couplings, in continuous and pulsed magnetic fields up to 58 T. In particular, we have mapped the…
View article: Origin of the non-Fermi-liquid behavior in CeRh2As2
Origin of the non-Fermi-liquid behavior in CeRh2As2 Open
Unconventional superconductivity in heavy-fermion systems appears often near magnetic quantum critical points (QCPs). This seems to be the case also for CeRh2As2 (Tc $\approx$ 0.31 K). CeRh2As2 shows two superconducting (SC) phases, SC1 an…
View article: Anisotropic magnetoresistance in altermagnetic MnTe
Anisotropic magnetoresistance in altermagnetic MnTe Open
View article: Anisotropic magnetoresistance in altermagnetic MnTe
Anisotropic magnetoresistance in altermagnetic MnTe Open
Recently, MnTe was established as an altermagnetic material that hosts spin-polarized electronic bands as well as anomalous transport effects like the anomalous Hall effect. In addition to these effects arising from altermagnetism, MnTe al…
View article: Saturation of the anomalous Hall effect at high magnetic fields in altermagnetic RuO2
Saturation of the anomalous Hall effect at high magnetic fields in altermagnetic RuO2 Open
Observations of the anomalous Hall effect in RuO2 and MnTe have demonstrated unconventional time-reversal symmetry breaking in the electronic structure of a recently identified new class of compensated collinear magnets, dubbed altermagnet…
View article: Saturation of the anomalous Hall effect at high magnetic fields in altermagnetic RuO2
Saturation of the anomalous Hall effect at high magnetic fields in altermagnetic RuO2 Open
Observations of the anomalous Hall effect in RuO$_2$ and MnTe have demonstrated unconventional time-reversal symmetry breaking in the electronic structure of a recently identified new class of compensated collinear magnets, dubbed altermag…
View article: Orbital-induced crossover of the Fulde-Ferrell-Larkin-Ovchinnikov phase into Abrikosov-like states
Orbital-induced crossover of the Fulde-Ferrell-Larkin-Ovchinnikov phase into Abrikosov-like states Open
The Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state can emerge in\nsuperconductors for which the orbital critical field exceeds the Pauli limit.\nHere, we present angular-resolved specific-heat data of the\nquasi-two-dimensional organic supe…