Tootfinder

Coexisting Kagome and Heavy Fermion Flat Bands in YbCr$_6$Ge$_6$
Hanoh Lee, Churlhi Lyi, Taehee Lee, Hyeonhui Na, Jinyoung Kim, Sangjae Lee, Younsik Kim, Anil Rajapitamahuni, Asish K. Kundu, Elio Vescovo, Byeong-Gyu Park, Changyoung Kim, Charles H. Ahn, Frederick J. Walker, Ji Seop Oh, Bo Gyu Jang, Youngkuk Kim, Byungmin Sohn, Tuson Park
https://

Coexisting Kagome and Heavy Fermion Flat Bands in YbCr$_6$Ge$_6$
Flat bands, emergent in strongly correlated electron systems, stand at the frontier of condensed matter physics, providing fertile ground for unconventional quantum phases. Recent observations of dispersionless bands at the Fermi level in kagome lattice open the possibility of unifying the disjoint paradigms of topology and correlation-driven heavy fermion liquids. Here, we report the unprecedented coexistence of these mechanisms in the layered kagome metal YbCr6Ge6. At high temperatures, an in…

Im sündteuren Schönbrunnerbad (ausnahmsweise) noch über die Runde glatzköpfiger Sonnenbrillenträger mit Muskelpaketen in der Wiese geschmunzelt, im Restaurant woanders dann saßen drei so ähnlich ausgestattete junge Männer am Nebentisch.
Als ich kam, ging's bei denen noch um Metal-Bands, dann drehte sich das Gespräch und es ging flugs auf berührende Weise um ihre jeweiligen Zweierbeziehungen, Väterrollen bei Tochter-Parentierung und Sohnesrollen bei Elternpflege.

Dirac quantum criticality in twisted double bilayer transition metal dichalcogenides
Jan Biedermann, Lukas Janssen
https://arxiv.org/abs/2509.04561 https://

Dirac quantum criticality in twisted double bilayer transition metal dichalcogenides
We investigate the phase diagram of moiré double bilayer transition metal dichalcogenides with ABBA stacking as a function of twist angle and applied pressure. At hole filling $ν= 2$ per moiré unit cell, the noninteracting system hosts a Dirac semimetal with graphene-like low-energy bands in the moiré Brillouin zone. At small twist angles, the Fermi velocity is reduced and interactions dominate the low-temperature behavior. A strong-coupling analysis identifies insulating ferromagnetic and …

Strongly Entangled Kondo and Kagome Lattices and the Emergent Magnetic Ground State in Heavy-Fermion Kagome Metal YbV$_6$Sn$_6$
Rui Lou, Max Mende, Riccardo Vocaturo, Hao Zhang, Qingxin Dong, Man Li, Pengfei Ding, Erjian Cheng, Zhiguang Liao, Yu Zhang, Junfa Lin, Reza Firouzmandi, Vilmos Kocsis, Laura T. Corredor, Yurii Prots, Oleksandr Suvorov, Anupam Jana, Jun Fujii, Ivana Vobornik, Oleg Janson, Wenliang Zhu, Jeroen van den Brink, Cornelius Krellner, Minghu Pan, Bosen Wang, Tianlong …

Strongly Entangled Kondo and Kagome Lattices and the Emergent Magnetic Ground State in Heavy-Fermion Kagome Metal YbV$_6$Sn$_6$
Applying angle-resolved photoemission spectroscopy and density functional theory calculations, we present compelling spectroscopic evidence demonstrating the intertwining and mutual interaction between the Kondo and kagome sublattices in heavy-fermion intermetallic compound YbV$_6$Sn$_6$. We reveal the Yb 4$f$-derived states near the Fermi level, along with the presence of bulk kagome bands and topological surface states. We unveil strong interactions between the 4$f$ and itinerant electrons, w…

Obstruction-Driven Parity Inversion for Enhanced Optical Absorption in Hexagonal Transition Metal Dichalcogenides
Seungil Baek, Jun Jung, Yong-Hyun Kim
https://arxiv.org/abs/2510.01575

Obstruction-Driven Parity Inversion for Enhanced Optical Absorption in Hexagonal Transition Metal Dichalcogenides
The optical selection rule states that opposite parity between the valence and conduction bands is required for optical absorption to occur. However, monolayer hexagonal transition metal dichalcogenides (h-TMDs) such as $ \mathrm{MoS}_{2} $ exhibit pronounced optical absorption despite their nominally dipole-forbidden d-d transitions. In this Letter, we elucidate a parity inversion mechanism through which obstruction-driven band inversion promotes dipole-allowed optical transitions near the ban…

You know this one. We know you know this one ... and if you don’t think you do, trust us, you will the second it kicks in. Carrying on our theme of bands with “The” in the name, this week’s pick is a well-known track from The Raconteurs.
Don't forget to follow us for your weekly dose of #rock and #metal

The Raconteurs - Steady, As She Goes
One awesome, hand picked song from the world of rock and metal, showcased every week. Nothing more, nothing less! 🤘

Unoccupied bands in the molybdenum dichalcogenides MoS$_2$, MoSe$_2$, and MoTe$_2$
J. Jobst, E. E. Krasovskii, R. Ribeiro, T. A. de Jong, C. R. Dean, R. M. Tromp, S. J. van der Molen
https://arxiv.org/abs/2509.04411

Unoccupied bands in the molybdenum dichalcogenides MoS$_2$, MoSe$_2$, and MoTe$_2$
We present angle-resolved reflected electron spectroscopy (ARRES) data for the three molybdenum-based transition metal dichalcogenides (TMDs) \mos, \mose, and \mote. To follow the changes as the series moves from S to Se to Te in more detail, we determine accurate IV-spectra for monolayers and bulk TMDs. These experimental data sets are then compared with theoretical predictions for both the unoccupied band structure and the scattering density of states. We find good agreement, especially for l…

Never got into these guys, but this is a great starting point
https://www.guitarworld.com/artists/bands/the-inside-story-of-hanoi-rocks

“Interviewers were telling me that I started the whole glam rock, hair metal scene. I said, ‘What? Don’t blame me for that!’” Drugs, guitars, triumph and tragedy – the inside story of Hanoi Rocks
40 years ago – after moving to London to invent the movement that would inspire a million L.A. bands – Finnish upstarts Hanoi Rocks self-destructed. This is their story

Sliding-induced ferrovalley polarization and possible antiferromagnetic half-metal in bilayer altermagnets
Xin Zhang, Shihao Zhang
https://arxiv.org/abs/2509.00430 https://

Sliding-induced ferrovalley polarization and possible antiferromagnetic half-metal in bilayer altermagnets
Altermagnets, a newly discovered class of materials, exhibit zero net magnetization while hosting spin-split electronic bands. However, monolayer altermagnets maintain degenerate band gaps at the high-symmetry X and Y points in the Brillouin zone, manifesting a paravalley phase characterized by unpolarized valley states. In this work, we demonstrate that spontaneously broken valley degeneracy can be achieved through interlayer sliding in engineered M$_2$A$_2$B and M$_2$AA$'$B bilayer altermagne…

Why Compressed Metal Hydrides are Near-room-temperature Superconductors
Warren E. Pickett
https://arxiv.org/abs/2508.18429 https://arxiv.org/pdf/2508.18429…

Why Compressed Metal Hydrides are Near-room-temperature Superconductors
This contribution provides a partial response to the titular statement since, it will be claimed,the ``why'' is not yet understood, but there is a pathway for achieving a more complete understanding. The sense of the community has been that, given a prospective metal hydride and pressure, the energy landscape can be surveyed computationally for thermodynamic and dynamic stability, the Eliashberg spectral function with its required input (energy bands, phonon modes, coupling matrix elements) can…

Is there a tool to listen to random bandcamp bands?
E.g.: i want to listen to random bands from category punk? Or only from metal?
Somehow i haven't seen that feature?
#bandcamp #random #music…

Interacting spin and charge density waves in kagome metal FeGe
Mason L. Klemm, Tingjun Zhang, Barry L. Winn, Fankang Li, Feng Ye, Sijie Xu, Xiaokun Teng, Bin Gao, Ming Yi, Pengcheng Dai
https://arxiv.org/abs/2510.01053

Interacting spin and charge density waves in kagome metal FeGe
Unveiling the interplay between spin density wave (SDW) and charge density wave (CDW) orders in correlated electron materials is important to obtain a comprehensive understanding of their electronic, structural, and magnetic properties. Kagome lattice materials are interesting because their flat electronic bands, Dirac points, and van Hove singularities can enable a variety of exotic electronic and magnetic phenomena. The kagome metal FeGe, which exhibits a CDW order deep within an A-type antif…

Carrying on our theme of bands with “The” in the name, this week’s pick is a slice of ‘90s nostalgia from The Ernies ... funky, fun, and impossible not to groove to.
Check it out and see what we had to say about the track and the band behind it.
Follow us for your weekly dose of #rock and #metal

The Ernies - Here and Now
One awesome, hand picked song from the world of rock and metal, showcased every week. Nothing more, nothing less! 🤘

Higher Chern bands in helical homotrilayer transition metal dichalcogenides
Jungho Daniel Choi, Nicol\'as Morales-Dur\'an, Yves H. Kwan, Andrew J. Millis, Nicolas Regnault, Daniele Guerci
https://arxiv.org/abs/2507.17819

Higher Chern bands in helical homotrilayer transition metal dichalcogenides
We propose helically twisted homotrilayer transition metal dichalcogenides as a platform for realizing correlated topological phases of matter with higher and tunable Chern numbers. We show that a clear separation of scales emerges for small twist angles, allowing us to derive a low-energy continuum model that captures the physics within moiré-scale domains. We identify regimes of twist angle and displacement field for which the highest-lying hole band is isolated from other bands and is topol…

Inducing ferromagnetism by structural engineering in a strongly spin-orbit coupled oxide
Ji Soo Lim, Carmine Autieri, Merit Spring, Martin Kamp, Amar Fakhredine, Pavel Potapov, Daniel Wolf, Sergii Pylypenko, Axel Lubk, Johannes Schultz, Nicolas Perez, B\"orge Mehlhorn, Louis Veyrat, Mario Cuoco, Fadi Choueikan, Philippe Ohresser, Bernd B\"uchner, Giorgio Sangiovanni, Ralph Claessen, Michael Sing

Inducing ferromagnetism by structural engineering in a strongly spin-orbit coupled oxide
Magnetic materials with strong spin-orbit coupling (SOC) are essential for the advancement of spin-orbitronic devices, as they enable efficient spin-charge conversion, complex magnetic structures, spin-valley physics, topological phases and other exotic phenomena. 5d transition-metal oxides such as SrIrO3 feature large SOC, but usually show paramagnetic behavior due to broad bands and a low density of states at the Fermi level, accompanied by a relatively low Coulomb repulsion. Here, we unveil …

Layer-selective Cooper pairing in an alternately stacked transition metal dichalcogenide
Haojie Guo, Sandra Sajan, Iri\'an S\'anchez-Ram\'irez, Tarushi Agarwal, Alejandro Blanco Peces, Chandan Patra, Maia G. Vergniory, Rafael M. Fernandes, Ravi Prakash Singh, Fernando de Juan, Maria N. Gastiasoro, Miguel M. Ugeda
https://

Layer-selective Cooper pairing in an alternately stacked transition metal dichalcogenide
Multigap superconductivity emerges when superconducting gaps form on distinct Fermi surfaces. Arising from locally overlapping atomic orbitals, multiple superconducting bands introduce a new internal degree of freedom in the material that, however, escapes external control due to their coexistence in real space in the known multigap superconductors. Here, we show that the layered superconductor 4Hb-TaSSe - composed of alternating trigonal (H) and octahedral (T) polymorph layers - is a multigap …

Localized Excitons and Landau-Level Mixing in Time-Reversal Symmetric Pairs of Chern Bands
Guopeng Xu, Nemin Wei, Inti Sodemann Villadiego, Chunli Huang
https://arxiv.org/abs/2509.18438

Localized Excitons and Landau-Level Mixing in Time-Reversal Symmetric Pairs of Chern Bands
We study Landau-level mixing in a time-reversal-symmetric Hamiltonian composed of two sets of Landau levels with opposite magnetic field, relevant to moiré minibands in twisted homobilayer transition-metal dichalcogenides in the adiabatic limit, where electrons in opposite valleys have flat Chern bands with opposite Chern numbers. Strong spin-orbit coupling polarizes spins in opposite directions in opposite valleys, separating Coulomb interactions into like-spin ($V^{\uparrow\uparrow}$) and op…

Single domain spectroscopic signatures of a magnetic Kagome metal
L. Plucinski, G. Bihlmayer, Y. Mokrousov, Yishui Zhou, Yixi Su, A. Bostwick, C. Jozwiak, E. Rotenberg, D. Usachov, C. M. Schneider
https://arxiv.org/abs/2507.12085

Single domain spectroscopic signatures of a magnetic Kagome metal
Spin- and orbital-resolved access to the electronic bands is necessary to establish key properties of quantum materials such as the quantum-geometric tensor. Despite recent revival on magnetic Kagome compounds, no spectroscopic access to their magnetic properties has been available so far due to small domain sizes and lack of appropriate techniques. Furthermore, their real space magnetic texture is often complex and temperature-dependent. We investigate the magnetic Kagome metal DyMn$_6$Sn$_6$ …

Enhanced Phonon-Assisted Tunneling in Metal -- Twisted Bilayer Graphene Junctions
Radhika Soni, Suvronil Datta, Robin Bajaj, Saisab Bhowmik, Shinjan Mandal, Baladitya Suri, Kenji Watanabe, Takashi Taniguchi, Manish Jain, U. Chandni
https://arxiv.org/abs/2507.12991

Enhanced Phonon-Assisted Tunneling in Metal -- Twisted Bilayer Graphene Junctions
We report planar tunneling spectroscopy measurements on metal-WSe$_2$-twisted bilayer graphene heterostructures across a broad range of gate and bias voltages. The observed experimental features are attributed to phonon-assisted tunneling and the significantly high density of states within the moiré bands. A notable finding is the enhanced phonon-assisted tunneling in twisted bilayer graphene compared to Bernal bilayer graphene, which arises from a more relaxed in-plane momentum matching crite…

Theoretical investigation of Quantum Anomalous Hall Effect in Potassium Tri-vanadium Pentantimonide
Partha Goswami
https://arxiv.org/abs/2508.18692 https://

Theoretical investigation of Quantum Anomalous Hall Effect in Potassium Tri-vanadium Pentantimonide
The Kagome metal Potassium Tri-vanadium Pent-antimonide can support the quantum anomalous Hall effect theoretically. This is justified by flat bands and Dirac points susceptible to gap opening by spin-orbit coupling or magnetic ordering. The theoretical investigation of this quantum effect is possible exploring strategies like magnetic proximity, and strain or electric gating tuning. Our goal here is to explore the possibility of quantum anomalous Hall effect with a system Hamiltonian involving…

Evolution from Topological Dirac Metal to Flat-band-Induced Antiferromagnet in Layered KxNi4S2 (0<=x<=1)
Hengdi Zhao, Xiuquan Zhou, Hyowon Park, Tianqi Deng, Brandon Wilfong, Alann P. Au II, Samuel E. Pate, Craig M. Brown, Hui Wu, Tushar Bhowmick, Tessa McNamee, Ravhi Kumar, Yu-Sheng Chen, Zhi-Li Xiao, Russell Hemley, Weizhao Cai, Shanti Deemyad, Duck-Young Chung, Stephan Rosenkranz, Mercouri G. Kanatzidis

Evolution from Topological Dirac Metal to Flat-band-Induced Antiferromagnet in Layered KxNi4S2 (0<=x<=1)
Condensed matter systems with coexisting Dirac cones and flat bands, and a switchable control between them within a single system, are desirable but remarkably uncommon. Here we report a layered quantum material system, KxNi4S2 (0 <= x <= 1), that simultaneously hosts both characteristics without involving typical Kagome/honeycomb lattices. Enabled by a topochemical K-deintercalation process, the Fermi surface can be fine-tuned continuously over a wide range of energies. Consequently, a non-mag…

Quantum Phases in Twisted Homobilayer Transition Metal Dichalcogenides
Bohao Li, Wen-Xuan Qiu, Fengcheng Wu, A. H. MacDonald
https://arxiv.org/abs/2509.07360 https://

Quantum Phases in Twisted Homobilayer Transition Metal Dichalcogenides
Twisted homobilayer transition metal dichalcogenides - specifically twisted bilayer MoTe$_2$ and twisted bilayer WSe$_2$ - have recently emerged as a versatile platform for strongly correlated and topological phases of matter. These two-dimensional systems host tunable flat Chern bands in which Coulomb interactions can dominate over kinetic energy, giving rise to a variety of interaction-driven phenomena. A series of groundbreaking experiments have revealed a rich landscape of quantum phases, i…

Resonantly enhanced polariton-mediated superconductivity in a doped transition metal dichalcogenide monolayer
Kenneth Choo, Olivier Bleu, Meera M. Parish, Jesper Levinsen
https://arxiv.org/abs/2508.09619

Resonantly enhanced polariton-mediated superconductivity in a doped transition metal dichalcogenide monolayer
We present a proposal for achieving light-induced superconductivity using exciton polaritons - hybrid light-matter particles of excitons (bound electron-hole pairs) and microcavity photons. In contrast to previous theories of polariton-mediated superconductivity, which typically require multiple semiconductor layers, we show that superconductivity can be induced within a single semiconductor monolayer with inverted conduction bands, such as in the tungsten-based transition metal dichalcogenides…

Giant Splitting of Folded Dirac Bands in Kekul\'{e}-ordered Graphene with Eu Intercalation
Xiaodong Qiu, Tongshuai Zhu, Zhenjie Fan, Kaili Wang, Yuyang Mu, Bin Yang, Di Wu, Haijun Zhang, Can Wang, Huaiqiang Wang, Yi Zhang
https://arxiv.org/abs/2509.05633

Giant Splitting of Folded Dirac Bands in Kekulé-ordered Graphene with Eu Intercalation
Kekulé-ordered graphene on SiC realized by intercalating two-dimensional metal layers offers a versatile platform for exploring intriguing quantum states and phenomena. Here, we achieve the intercalation of $(\mathrm{\sqrt{3}\times\sqrt{3}})\mathit{R}30^\circ$-ordered Eu layer between epitaxial graphene and SiC substrate, realizing a Kekulé graphene with large local magnetic moments of intercalated Eu atoms. Combining angle-resolved photoemission spectroscopy (ARPES) and density functional th…

Moir\'e excitons in generalized Wigner crystals
Jing-Yang You, Chih-En Hsu, Zien Zhu, Benran Zhang, Ziliang Ye, Mit H. Naik, Ting Cao, Hung-Chung Hsueh, Steven G. Louie, Mauro Del Ben, Zhenglu Li
https://arxiv.org/abs/2509.08211

Moiré excitons in generalized Wigner crystals
Moiré superlattices of transition-metal dichalcogenide bilayers host strong Coulomb interactions residing in narrow electron bands, leading to correlated insulating states at fractional carrier doping densities, known as generalized Wigner crystals. In excited states, the formation of moiré excitons is expected to be fundamentally shaped by the Wigner-crystal ground states, manifesting an intricate interplay between electronic and excitonic correlations. However, the microscopic description o…